Per-Henrik Randsborg

• Mo, Ingunn Fleten; Faleide, Anne Gro Heyn; Hysing-Dahl, Trine; Magnussen, Liv Heide; Randsborg, Per-Henrik & Bogie, Rob [Vis alle 8 forfattere av denne artikkelen] (2026). From Fear to Function: How Physiotherapists Navigate Psychological Challenges in Patients Undergoing Rehabilitation After ACL Reconstruction. Sports Health: A Multidisciplinary Approach (SPH). ISSN 1941-7381. s. 1–7. doi: 10.1177/19417381261471381. Fulltekst i vitenarkiv Vis sammendrag

  Background: Psychological readiness plays a critical role in return to sport (RTS) outcomes after anterior cruciate ligament reconstruction (ACLR), yet physiotherapists (PTs) often feel unprepared to support this aspect of recovery. Although clinical guidelines advocate for psychological strategies, practical tools and structured interventions remain scarce. Hypothesis: Experienced PTs will actively use psychological strategies during rehabilitation to support patient readiness for RTS. PTs perceive themselves as playing a central role in addressing psychological barriers. Study Design: Qualitative study using semi-structured focus group interviews. Level of Evidence: Level 5. Methods: A total of 21 experienced PTs were recruited based on their involvement in ACLR rehabilitation. Three focus group interviews were conducted in each country using a semi-structured guide, developed in English and translated into Norwegian/Dutch. Interviews conducted via video call were recorded, transcribed verbatim, and analyzed using systematic text condensation to identify key themes. Results: PTs reported investing considerable time in building therapeutic alliances, enabling them to support psychological readiness throughout ACLR rehabilitation. Common strategies included individualized communication, goal-setting, reassurance through milestone tracking, and graded exposure to sport-specific movements. PTs also adapted their approaches based on patient responses. However, barriers such as time constraints, lack of formal psychological training, and organizational disruptions were identified. Conclusion: PTs play an essential role in addressing psychological readiness in ACLR rehabilitation. Key strategies include building alliances, individualized support, and gradually reintroducing patients to sport-specific activities. Despite their efforts, limited psychological training and structural challenges can hinder optimal care. Addressing these gaps may enhance rehabilitation outcomes and RTS success.

• Tirta, Maria; Eikrem-Holsæter, Amalie; Holt, Eline Borg; Olsson, Richard; Jakobsen, Rune Bruhn & Randsborg, Per-Henrik (2026). Should we remove flexible intramedullary nails after diaphyseal forearm pediatric fracture? A cohort study of 288 patients. Acta Orthopaedica. ISSN 1745-3674. 97, s. 665–671. doi: 10.2340/17453674.2026.46804. Fulltekst i vitenarkiv
• Mo, Ingunn Fleten; Melick, Nicky van; Hysing-Dahl, Trine; Magnussen, Liv Heide; Randsborg, Per-Henrik & Bogie, Rob [Vis alle 8 forfattere av denne artikkelen] (2026). Patients’ Mental Barriers in Rehabilitation after ACL Reconstruction: A Qualitative Interview Study. International Journal of Sports Physical Therapy. 21(9), s. 821–831. doi: 10.26603/001c.167447. Fulltekst i vitenarkiv Vis sammendrag

  Background: Recovery after anterior cruciate ligament reconstruction (ACLR) involves both physical and psychological challenges. Although psychological readiness for return to sport (RTS) is increasingly recognized as important, less is known about how patients experience psychological barriers during rehabilitation and how interactions with physiotherapists (PTs) may shape this process. Purpose: To explore how patients recovering from ACLR navigate potential psychological barriers, what helps them overcome these barriers, and how they experience the role of PTs in enhancing their psychological readiness. Study design: Qualitative interview Methods: Nine patients (5 women, 4 men), aged 19-45 years, from Norway and the Netherlands, 5-9 months post-ACLR, were recruited for individual semi-structured interviews. Data were analyzed using systematic text condensation. Results: Three themes emerged: (1) The Mental Landscape of Rehabilitation - confidence builds through physical progress amidst emotional setbacks; (2) Pillars of Support - professional and social support, especially from PTs, helps manage fear and build trust; (3) Lessons Learned Along the Way - patients develop insight, resilience, and personalized strategies for mental recovery. Psychological readiness was experienced as a dynamic process shaped by physical progress, emotional responses, support systems, and interactions with PTs. Conclusion: Psychological readiness should be viewed as an evolving component of ACLR recovery, shaped by patients’ experiences, support systems, and interactions with PTs. These findings highlight the importance of a holistic and individualized rehabilitation approach that acknowledges mental barriers, supports confidence-building, and considers referral to mental health professionals when needed.

• Straume-Næsheim, Truls Martin; Randsborg, Per-Henrik; Nilsgård, Tina Løkken & Årøen, Asbjørn (2026). Medial Patellofemoral Ligament Reconstruction vs Nonoperative Treatment for Recurrent Lateral Patellar Dislocation: Three-Year Results From a Randomized Controlled Trial. American Journal of Sports Medicine. ISSN 0363-5465. 54(4), s. 773–779. doi: 10.1177/03635465261416931. Fulltekst i vitenarkiv Vis sammendrag

  Background: Medial patellofemoral ligament reconstruction (MPFL-R) is the primary surgical intervention for recurrent lateral patellar dislocation (LPD). Isolated MPFL-R is recommended for patients without anatomic high-risk factors that predispose to further dislocations. Purpose: To compare instability recurrence in patients with recurrent LPD without underlying anatomic risk factors treated with MPFL-R versus active rehabilitation. Study Design: Randomized controlled clinical trial; Level of evidence, 1. Methods: Patients aged 12 to 30 years with recurrent LPD and no underlying anatomic high-risk factors for further dislocations—specifically, no severe trochlear dysplasia (Dejour D) and a tibial tuberosity–trochlear groove distance ≤20 mm on computed tomography—were randomized to receive knee arthroscopy with isolated MPFL-R followed by active rehabilitation (MPFL group) or knee arthroscopy without reconstruction followed by active rehabilitation (control group). The primary outcome was subjective persistent patellar instability at 3 years. Knee function at baseline and 1 and 3 years was assessed by the following patient-reported outcome measure (PROM) scores: Knee injury and Osteoarthritis Outcome Score (KOOS), Kujala Knee Score, Cincinnati Knee Rating System, and Noyes Sports Activity Rating Scale. Results: Between 2010 and 2019, 61 patients (72.1% female) were included in the study and randomized, with 30 assigned to the MPFL group and 31 to the control group. At 3-year follow-up, subjective persistent patellar instability was reported by 5 patients in the MPFL group (16.7%) versus 15 patients in the control group (53.6%), corresponding to an odds ratio of 5.8 (95% CI, 1.7-19.4; P = .003). Both groups reported significant improvements in all PROM scores from baseline to 3 years. However, no significant differences in PROM scores were observed between the groups at any follow-up time point. Conclusion: Isolated MPFL-R was more effective than active rehabilitation alone in preventing patellar instability after 3 years. Trial Registration: ClinicalTrials.org (NCT02263807).

• Sanchez, Lawrence Medina; Gjestland, Johanna; Randsborg, Per-Henrik & Alhaug, Ole Kristian (2026). Mid- to Long-Term Clinical Outcomes After Lumbar Microdiscectomy in Adolescent Patients: A Descriptive Study. Children. 13(4). doi: 10.3390/children13040578. Fulltekst i vitenarkiv Vis sammendrag

  Background/Objectives: Adolescent lumbar disc herniation (ALDH) is rare. Evidence on long-term surgical outcomes remains limited. The objective of this study was to evaluate mid- and long-term clinical outcomes following lumbar microdiscectomy in adolescents with lumbar disc herniation (LDH). Methods: A single-institution retrospective cohort study of patients under 19 years who underwent lumbar microdiscectomy over a ten-year period. Baseline clinical and radiological data were obtained from electronic patient records (EPR) and Magnetic Resonance Imaging (MRI). Patient-reported outcomes were collected at follow-up using the Oswestry Disability Index (ODI) as the primary outcome and Numeric Rating Scales (NRS) for back and leg pain and Global Perceived Effect (GPE) as secondary outcomes. Descriptive statistics were used to summarize results. Results: Seventeen of 27 patients (63%) participated. Mean age at surgery was 16.9 years, and mean symptom duration prior to surgery was 11.3 months. All patients underwent disc-preserving microdiscectomy. At a mean follow-up of 67.7 months, mean ODI was 9.5, mean NRS back pain was 2.8, and mean NRS leg pain was 2.3. Fourteen patients (82%) reported being completely recovered or much improved. Conclusions: Lumbar microdiscectomy in adolescents with LDH showed acceptable mid- to long-term outcomes, low disability, and low pain levels at more than five years of follow-up. Clinical and imaging findings resembled those seen in adults, though symptom duration before surgery was prolonged.

• Aae, Tommy Frøseth; Jakobsen, Rune Bruhn; Dahl, Mai Britt; Årøen, Asbjørn; Randsborg, Per-Henrik & Hoel, Myrthle Slettvåg [Vis alle 7 forfattere av denne artikkelen] (2025). Physical activity and diurnal variation have no impact on plasma microRNA-140 expression levels in patients with knee osteoarthritis and healthy controls. Osteoarthritis and Cartilage Open. 8(1). doi: 10.1016/j.ocarto.2025.100720. Fulltekst i vitenarkiv Vis sammendrag

  Objective This study aimed to determine whether physical activity or diurnal variation influence circulating microRNA-140-3p (miR-140-3p) and miR-140-5p expression levels in patients with knee osteoarthritis (OA) compared to healthy controls. Method Twenty-one patients with knee OA and ten healthy controls ran on a treadmill for 20 ​min and blood samples were taken prior to and after running. To assess diurnal variation, blood samples were drawn at six different times during a 24-h period. RNA was extracted from plasma and used for cDNA synthesis. Expression levels were assessed with real-time quantitative polymerase chain reaction and compared between patients and controls. Results All participants had detectable expression levels of miR-140-3p and miR-140-5p. A paired analysis could not demonstrate statistically significant differences between the groups. Conclusions Plasma miR-140-3p and miR-140-5p expression levels were found in all samples; however, the expression levels were not affected by physical activity and did not show diurnal variation. The observation of stable miR-140 expression supports its potential as a reliable biomarker for OA, providing a methodological foundation for future diagnostic and translational studies.

• Andresen, Tor Kristian Molstad; Randsborg, Per-Henrik; Myhrvold, Ståle & Jakobsen, Rune Bruhn (2025). Compensation Claims After Treatment of Achilles Tendon Ruptures in Norway From 2010 to 2020. Foot & Ankle Orthopaedics. 10(3). doi: 10.1177/24730114251361475. Fulltekst i vitenarkiv Vis sammendrag

  Background: Compensation claims caused by medical treatment errors provide valuable insights into patients' experiences with received medical treatment and can help identify injuries and disabilities that might be preventable through optimized care. The objective of this retrospective descriptive study was to characterize accepted compensation claims filed after treatment for acute Achilles tendon rupture (ATR) in Norway, and to explore whether claim outcomes were associated with treatment modality or institutional catchment area. Methods: All claims filed to the Norwegian System of Patient Injury Compensation (NPE) after treatment of ATR between 2010 and 2020 were collected and categorized. The claims were organised based on whether they were accepted or denied, the initial treatment given, patient demographics, the reasons given by patients for filing claims, and the rationale provided by the NPE for accepting or rejecting compensation claims. Additionally, hospital patient catchment population were analyzed in relation to accepted claims. Results: One hundred forty-six compensation claims were received, of which 61 (41.8%) were accepted. Most accepted claims were related to surgical treatment (n = 30, 49%) or insufficient treatment (n = 22, 36%). The most frequent reason for claim acceptance was delayed diagnosis and/or treatment (15/61, 25%), followed by postoperative infections (10/61, 16%). There was no statistically significant correlation between accepted claims and institutional catchment area population. Conclusion: Delayed or missed diagnosis was the most common reason for accepted compensation claims following treatment for ATR. The study found no correlation between accepted claims and the catchment area population of the institution delivering the treatment.

• Rydberg, Emilia Möller; Pilskog, Kristian; Pakarinen, Harri; Randsborg, Per-Henrik; Saltzman, Charles L & Molund, Marius (2025). Weightbearing assessment to guide nonoperative treatment of lateral malleolar fractures: the paradigm change. Acta Orthopaedica. ISSN 1745-3674. 96, s. 780–787. doi: 10.2340/17453674.2025.44878. Fulltekst i vitenarkiv Vis sammendrag

  The goal of this Acta Orthopaedica educational article is to provide an update on how to evaluate lateral malleolar ankle fractures at the level of the syndesmosis and to guide clinicians in selecting the most appropriate treatment method. We aim to clarify the indications for non-surgical treatment and to provide clinicians with an evidence-based approach to decision-making in these frequently encountered injuries. The authors introduce the concept of “congruent on weightbearing” in contrast to the historical thinking of ankle fractures as stable or unstable. We further elaborate on how this thinking should be the basis in the decision-making regarding treatment method to safely differentiate fractures that will heal uneventfully without surgical intervention from those that need internal reduction and stabilization. As long as crucial parts of the deltoid ligament are intact, lateral malleolar ankle fractures at the level of the syndesmosis maintain, or regain, joint congruency under weightbearing. Ankle fractures that stay congruent under weightbearing often heal uneventfully and can be safely treated without surgery. Furthermore, research has shown that early weightbearing and short immobilization periods are beneficial for patient recovery without an increase in complication rates.

• Wikerøy, Annette Konstanse Bordewich; Randsborg, Per-Henrik; Aas, Eline; Fuglesang, Hendrik Frølich & Jakobsen, Rune Bruhn (2025). Cost-effectiveness analysis of locking nail compared with locking plate for displaced 3- and 4-part proximal humerus fractures: a secondary analysis of a randomized trial comparing the Multiloc nail and PHILOS plate. Acta Orthopaedica. ISSN 1745-3674. 96, s. 806–813. doi: 10.2340/17453674.2025.44881. Fulltekst i vitenarkiv Vis sammendrag

  Background and purpose: Previous studies show no clear difference in functional outcomes between locking nails and plates for proximal humerus fractures (PHFs). Economic evaluations provide valuable insights into cost-effectiveness to guide healthcare decisions. We aimed to conduct a cost-effectiveness analysis based on a semidouble-blinded randomized controlled trial comparing nailing and plating for displaced 3- and 4-part PHFs with 2-year follow-up.Methods: 79 patients with displaced 3- or 4-part PHFs were randomized to undergo open reduction and internal fixation using either a nail or a plate. Patients were followed for 2 years, with costs tracked for the index surgery, hospital stay, additional healthcare services, and secondary procedures. Quality-adjusted life years (QALYs) were calculated using EQ-5D, and incremental cost-effectiveness ratios (ICERs) were used to compare treatments.Results: 38 patients in each group were eligible for analysis. Mean total costs were €21,654 (standard deviation [SD] 10,448) for nails and €16,374 (SD 3,886) for plates, with a mean difference of €5,296 (95% confidence interval [CI] 1,989–8,603). Extra costs for reoperations and other non-regular follow-ups were €3,746 (SD 10,448) for nails and €265, (SD 1,217) for plates, resulting in a mean difference of €3,480 (CI –868 to 7,829) extra costs for nails. The mean QALY showed no statistical difference between groups of 0.09 (CI –0.003 to 0.17) (1.65 in the nail group and 1.74 in the plate group).Conclusion: Plates were more cost-effective compared with nails but did not result in a statistically significant difference in QALY.

• Mo, Ingunn Fleten; Harlem, Thomas; Faleide, Anne Gro Heyn; Strand, Torbjørn; Vindfeld, Søren & Solheim, Eirik Johan [Vis alle 8 forfattere av denne artikkelen] (2025). Comparable Mid- to Long-term Outcomes of Semitendinosus and Semitendinosus/Gracilis Grafts in ACL Reconstruction: Median 8-Year (Range, 5-10 Years) Results From a Randomized Controlled Study. American Journal of Sports Medicine. ISSN 0363-5465. 53(9), s. 2145–2153. doi: 10.1177/03635465251344106. Fulltekst i vitenarkiv
• Wikerøy, Annette Konstanse Bordewich; Fuglesang, Hendrik Frølich; Jakobsen, Rune Bruhn; Thomas, Owen Matthew Truscott & Randsborg, Per-Henrik (2025). Intramedullary Nail Versus Locking Plate for Displaced 3- and 4-Part Fractures of the Proximal Humerus Two-Year Results From a Semidouble-Blind Randomized Trial. JBJS Open Access. 10(1). doi: 10.2106/JBJS.OA.24.00078. Fulltekst i vitenarkiv Vis sammendrag

  Background: This is a semidouble-blind randomized controlled trial comparing the clinical and radiographic outcomes of fixation of displaced 3- and 4-part proximal humerus fractures with an intramedullary nail versus a locking plate. Methods: Seventy-nine patients aged 45 to 81 years (mean 66.5 years) were randomized to open reduction and osteosynthesis with either locking nails or plates. The primary outcome was the Disabilities of the Arm, Shoulder, and Hand (DASH) score at 2 years after surgery. The secondary outcomes were the Constant score (CS), Oxford shoulder score (OSS), visual analog scale for pain at rest and during activity, and complication and reoperation rates. The patients were assessed at 6 weeks, 12 weeks, 6 months, 1 year, and 2 years after inclusion. Physiotherapists who were blinded to the choice of implant performed assessments at 6 months and 2 years. Patients were also blinded to the choice of implant. Results: Three patients were lost to follow-up, leaving data from 38 patients in each group available for analysis. There were no statistically significant differences in the DASH score, CS, OSS, or pain score at any time. The DASH score at 2 years was 12.7 (95% confidence interval [CI] 8.8-17.0) for the nail group and 10.0 (95% CI 5.6-16.1) for the plate group (p = 0.48). Twelve (32%) patients underwent reoperation in the nail group, whereas 2 (5%) patients underwent reoperation in the plate group (p = 0.006). Fourteen (37%) patients in the nail group and 4 (11%) patients in the plate group experienced complications (p = 0.05). Conclusions: There were no statistically significant differences in patient-reported outcomes or function 2 years after surgery for fixation of displaced 3- and 4-part part proximal humerus fractures with nails or plates. However, there were more complications and reoperations in the nail group. Level of Evidence: Therapeutic Level I. See Instructions for Authors for a complete description of levels of evidence.

• Sailer, Monica Alessandra; Wergeland, Hilde Petrine Opdan & Randsborg, Per-Henrik (2025). Implementation of a clinical pathway for diabetes-related foot ulcers reduced the number of amputations and shortened hospital stay. Journal of Foot and Ankle Research. 18(1). doi: 10.1002/jfa2.70024. Fulltekst i vitenarkiv Vis sammendrag

  Introduction Diabetes-related foot ulcer (DFU) is the leading cause for lower extremity amputations (LEAs) in western countries, and may cause social isolation, depression, and death. However, people with DFU are not offered the same prioritized care as cancer patients, despite comparable mortality rates. We therefore decided to create a clinical pathway for patients with DFU. The purpose of this study is to evaluate the efficacy of implementing a new clinical pathway on rates of LEA, length of hospital stays, and cost reduction. Methods On January 1, 2019, a new clinical pathway ensured that all patients with a DFU were evaluated in a designated clinic run by a foot and ankle orthopedic surgeon in collaboration with the vascular surgeons, supported by a specialized wound nurse and a certified prosthetist/orthotist (CPO). We designed an algorithm for the first consultation to identify patients in need for further investigation by other specialties such as endocrinology, infectious diseases, cardiology, or vascular surgery. All patients underwent a surgical wound debridement of DFU. Negative pressure wound therapy (NPWT) was not applied. After surgery, the dressings were changed daily on the ward, until the wound was deemed viable and clean. The patients were followed for two years and compared to a historic cohort of patients with DFU admitted to the institution in 2017. Results The number of major amputations was reduced from 65% (13/20) to 7.4% (2/27) (p < 0.001) after the introduction of the clinical pathway. Both the mean number of surgical revisions (5.5 vs. 1.2) and the median length of stay (46 vs. 9 days) were statistically significantly reduced. The median cost per patient was reduced by 76% (from €538 000 to €129 000, p < 0.001). Conclusion The clinical pathway for managing DFUs resulted in a reduction in major amputations and shorter hospital stays. Discontinuing NPWT after surgical debridement did not adversely affect clinical outcomes. The new pathway also contributed to lower healthcare costs.

• Randsborg, Per-Henrik; Aae, Tommy Frøseth; Visnes, Håvard; Birkenes, Thomas; Benth, Jurate Saltyte & Lian, Øystein Bjerkestrand [Vis alle 8 forfattere av denne artikkelen] (2025). Microfracture Versus Arthroscopic Debridement for the Treatment of Symptomatic Cartilage Lesions of the Knee: 2-Year Results From a Multicenter Double-Blinded Randomized Controlled Trial. American Journal of Sports Medicine. ISSN 0363-5465. 53(9), s. 2107–2117. doi: 10.1177/03635465251346961. Fulltekst i vitenarkiv Vis sammendrag

  Background: Knee cartilage injuries can lead to significant functional limitations, pain, and diminished quality of life. Microfracture (MF) is the most common surgical procedure for smaller (<2 cm2) cartilage lesions of the knee. However, there is no established gold-standard surgical intervention. Purpose: To compare functional and patient-reported outcomes after MF and arthroscopic debridement (AD) for symptomatic, isolated femoral cartilage injuries <2 cm2 in patients aged 18 to 50 years. Study Design: Randomized controlled trial; Level of evidence, 1. Methods: A total of 65 patients were included, randomized to undergo either MF (n = 31) or AD (n = 34), and followed for 2 years. The primary outcome was the change in the Knee injury and Osteoarthritis Outcome Score (KOOS) Quality of Life subscore. Secondary outcomes included scores for the other KOOS subscales, Tegner activity scale, Lysholm score, and visual analog scale for pain. Results: The mean age at the time of inclusion was 33.2 ± 9.7 years. There were 44 (68%) male patients. The mean size of the lesion was 1.2 ± 0.6 cm2. There was no statistically significant difference between the groups in the change in the KOOS Quality of Life subscore from baseline to 2 years (3.5 [95% CI, –10.0 to 16.9]; P = .61). There were 10 complications in 5 patients in the MF group and 2 complications in 2 patients in the AD group. According to a linear mixed model, there were no statistically significant differences between the groups for any of the secondary outcomes at any time point during the 2-year follow-up period. Conclusion: MF was not superior to AD when treating femoral cartilage lesions of the knee <2 cm2.

• Randsborg, Per-Henrik; Brinchmann, Jan Engelsen; Owesen, Christian; Engebretsen, Lars; Birkenes, Thomas & Hanvold, Heidi Andreassen [Vis alle 8 forfattere av denne artikkelen] (2024). Autologous Chondrocyte Implantation Is Not Better Than Arthroscopic Debridement for the Treatment of Symptomatic Cartilage Lesions of the Knee: Two-Year Results From a Randomized-Controlled Trial. Arthroscopy, Sports Medicine, and Rehabilitation (ASMAR). 6(2). doi: 10.1016/j.asmr.2024.100909. Fulltekst i vitenarkiv Vis sammendrag

  Purpose: To compare the functional and patient-reported outcome measures after autologous chondrocyte implantation (ACI) and arthroscopic debridement (AD) in symptomatic, isolated cartilage injuries larger than 2 cm2 in patients aged 18 to 50 years. Methods: Twenty-eight patients were included and randomized to ACI (n = 15) or AD (n = 13) and followed for 2 years. The primary outcome was the change in the Knee injury and Osteoarthritis Outcome Score (KOOS) Quality of Life (QoL) subscale. Results: The mean age at inclusion was 34.1 (standard deviation [SD] 8.5) years. There were 19 (68%) male patients. The mean size of the lesion was 4.2 (SD 1.7) cm2. There was a statistically significant and clinically meaningful improvement in patient-reported outcome measures from baseline to 2 years in both groups. The improvement from baseline to final follow-up for the primary endpoint (the KOOS QoL subscale) was larger for the AD group (39.8, SD 9.4) compared with the ACI group (23.8, SD 6.7), but this difference was not statistically significant (P = .17). However, according to a mixed linear model there were statistically significantly greater scores in the AD group for several KOOS subscales at several time points, including KOOS QoL, KOOS pain, and KOOS sport and recreation at 2 years. Conclusions: This study indicates that AD followed by supervised physiotherapy is equal to or better than ACI followed by supervised physiotherapy in patients with isolated cartilage lesions of the knee larger than 2 cm2. The improvement in KOOS QoL score from baseline to 2 years was clinically meaningful for both groups (23.8 points for ACI and 39.8 points AD), and larger for the AD group by 16 points.

• Randsborg, Per-Henrik; Banitalebi, Hasan; Årøen, Asbjørn & Straume-Næsheim, Truls Martin (2024). The Tibial Tuberosity–Trochlear Groove Distance Can either Increase or Decrease during Adolescent Growth. Children. 11(5). doi: 10.3390/children11050504. Fulltekst i vitenarkiv Vis sammendrag

  Increased Tibial Tuberosity–Trochlear Groove (TT-TG) distance is a risk factor for recurrent lateral patella dislocations (RLPD). Population-based cross-sectional studies on healthy subjects demonstrate that the TT-TG increases gradually during growth until skeletal maturity, but changes in the TT-TG distance during adolescence in patients with RLPD on an individual basis have not been previously investigated. This study aimed to measure changes in TT-TG distance during skeletal maturity. The TT-TG of 13 consecutive patients with open physes (mean age 13 years) with RLPD was measured on MRI at baseline and three years later. The change in TT-TG distance over the three-year period was measured. The mean change in TT-TG distance from the baseline to the three-year follow-up increased overall (2.9 mm, 95% Confidence Interval (CI) 2.1–3.7). However, the TT-TG distance could either increase or decrease during final growth. Our results suggest that the TT-TG distance in patients suffering from RLPD may either decrease or increase individually during the growth spurt. This contradicts the current concept that the TT-TG distance increases gradually during growth.

• Ludvigsen, Trine; Hammer, Ola-Lars; Fevang, Jonas Meling; Matre, Kjell; Dybvig, Eva Hansen & Randsborg, Per-Henrik (2024). Complex Regional Pain Syndrome Following Distal Radius Fracture: Does Surgical Method Matter? Journal of Wrist Surgery (JWS). ISSN 2163-3916. doi: 10.1055/s-0044-1788323. Fulltekst i vitenarkiv
• Mikaelsen, Jan Rune; Jakobsen, Rune Bruhn; Røtterud, Jan H & Randsborg, Per-Henrik (2024). Body Mass Index Did Not Affect the Risk of Revision 3-9 Years After Total Knee Replacement Surgery. Arthroplasty Today. 27. doi: 10.1016/j.artd.2024.101376. Fulltekst i vitenarkiv Vis sammendrag

  Background There are conflicting reports in the literature regarding the risk of revision after primary total knee replacement (TKR) in obese patients. The purpose of this study was to investigate if body mass index (BMI) influences the risk of revision 3-9 years after primary TKR. Methods All patients undergoing a primary TKR in our institution from 2014 to 2018 were included in a retrospective study. The effect of BMI on all-cause revision was estimated in a logistic regression analysis. A directed acyclic graph was created to identify variables affecting the primary endpoint (revision). According to the directed acyclic graph, adjustment was only needed for age and smoking. However, we also included variables thought to influence the revision risk based on clinical experience and previous research. The final logistic regression analysis was therefore adjusted for age, sex, smoking status, diabetes mellitus and the American Society of Anesthesiologists classification. Results One thousand fifty-nine primary TKR patients with a mean age of 68.1 (standard deviation 9.4) years were included. There were 609 (57.5%) women, and the median follow-up time was 5.6 (range 3.0-9.0) years. There were 41 (3.9%) revisions. BMI did not affect the risk of revision when adjusted for relevant covariates in a multivariate logistic regression analysis (odds ratio 0.99, 95% confidence interval 0.93-1.05, P = .6). Conclusions BMI did not influence the risk of revision rate 3-9 years after TKR.

• Hauksson, Ingi Thor; Havdal, Morten Beier; Benth, Jurate Saltyte; Hoelsbrekken, Sigurd Erik & Randsborg, Per-Henrik (2024). Collagenase Clostridium histolyticum Versus Needle Fasciotomy for Primary Metacarpophalangeal Dupuytren Contracture: Five-Year Results from a Randomized Controlled Trial. JBJS Open Access. 9(4). doi: 10.2106/JBJS.OA.24.00038. Fulltekst i vitenarkiv Vis sammendrag

  Background: Collagenase Clostridium histolyticum (CCH) and percutaneous needle fasciotomy (PNF) are 2 treatment options for Dupuytren disease. The purpose of this study was to compare these 2 methods in terms of clinical and patient-reported outcomes. Methods: Eighty patients (median age, 72 years; 83% male) with a single-digit primary metacarpophalangeal (MCP) joint contracture of ≥30° were randomized to either CCH or PNF and followed for 5 years. The primary outcome was the difference in flexion-contracture reduction at the MCP joint from baseline to 2 years, with additional analysis examining the effect of the primary endpoint variable up to 5 years. Secondary outcomes included complications, grip strength, scores on the visual analogue scale (VAS) for pain, the shortened version of the Disabilities of the Arm, Shoulder and Hand, the brief Michigan Hand Questionnaire, Unité Rhumatologique des Affections de la Main, and a VAS for treatment satisfaction as well as recurrence and retreatments. Results: The mean MCP joint contracture was 48° at baseline and 2° at 5 years in the CCH group, and 50° at baseline and 7° at 5 years in the PNF group. The reduction in MCP contracture at 2 years was larger in the CCH group than in the PNF group, with a mean difference between the groups of 12° (95% confidence interval [CI], 1.5° to 22.3°; p = 0.026). At 5 years, this mean difference was reduced to 6° (−1.5° to 12.8°; p = 0.1). There was no difference between the groups in any patient-reported outcome scores or grip strength beyond 4 weeks, with the exception of the brief Michigan Hand Questionnaire at 5 years. Ten (25%) of the patients in the PNF group compared with no patient in the CCH group had recurrence (contracture of ≥30°) at the MCP joint at 2 years. At 5 years, 17 (42.5%) of 40 patients in the PNF group had been retreated compared with 4 (10%) of 40 in the CCH group (p < 0.001). The CCH group experienced more transient complications (stiffness and hematoma) during the first week and were more satisfied (VAS satisfaction) from 1 year to the 5-year follow-up. Conclusions: The main finding of this study is that CCH and PNF were equally effective in reducing MCP flexion contracture, but the correction of contracture lasted longer in the CCH group.

• Randsborg, Per-Henrik; Aae, Tommy Frøseth; Bukholm, Ida Rashida Khan & Jakobsen, Rune Bruhn (2024). Compensation After Surgical Treatment for Hallux Valgus: A Review of 369 Claims to the Norwegian System of Patient Injury Compensation 2010–2020. Journal of patient safety. ISSN 1549-8417. 20(7), s. e104–e108. doi: 10.1097/PTS.0000000000001268. Fulltekst i vitenarkiv Vis sammendrag

  Purpose: The aim of the study is to identify the most common avoidable patient injuries related to hallux valgus surgery. Methods: We assessed the claims reported to the Norwegian System of Patient Injury Compensation (NPE) following surgery for hallux valgus in light of hospital volume. Data from NPE was categorized according to age, sex, reason for claim, and reason for accepted/rejected claim. The institutions were grouped by catchment population into low volume (<150,000), middle volume (150,000–300,000), and high volume (>300,000) institutions. The effect of hospital volume on the likelihood of an accepted claim was estimated. Results: NPE received 369 claims of which 173 (46.9%) were accepted. The main reason for accepted claims was recurrence of the deformity, wrong level osteotomy or insufficient fixation. A quarter of the claims were accepted because of lack of indication and one in 5 accepted claims was due to a postoperative infection. Patient treated at low-volume institutions had a higher fraction of accepted claims (P < 0.01). The odds ratio for an accepted claim in the low volume hospitals was 5.8 (95% confidence interval 4.1–8.3) compared with the middle- and high-volume institutions. Conclusions: The likelihood of a treatment error that leads to compensation was higher in low-volume institutions. Level of Evidence: Level II Prospective cohort study

• Nieuwenhuijse, Marc J.; Randsborg, Per-Henrik; Hyde, Jensen H.; Xi, Wenna; Franklin, Patricia & Sun, Limin [Vis alle 21 forfattere av denne artikkelen] (2023). Evidence-based objective performance criteria for the evaluation of hip and knee replacement devices and technologies. International Journal of Surgery (IJS). ISSN 1743-9191. 109(5), s. 1125–1135. doi: 10.1097/JS9.0000000000000169. Fulltekst i vitenarkiv
• Nilsgård, Tina Løkken; Øiestad, Britt Elin; Randsborg, Per-Henrik; Årøen, Asbjørn & Straume-Næsheim, Truls Martin (2023). Association between single leg hop tests and patient reported outcome measures and patellar instability in patients with recurrent patellar dislocations. BMJ Open sport & exercise medicine. 9(4). doi: 10.1136/bmjsem-2023-001760. Fulltekst i vitenarkiv Vis sammendrag

  Objectives: To assess the associations between the single leg hop tests at two premises; baseline and the change after 12 months, and change in patient reported outcome measures and persistent instability after 12 months in patients with recurrent lateral patellar dislocation (RLPD). Methods: 61 RLPD patients aged 12–30 with a mean (±SD) of 19.2 (±5.3) were assessed at baseline, and at 12 months after treatment with either active rehabilitation alone, or medial patellofemoral ligament reconstruction and active rehabilitation. Single leg hop for distance, triple hop for distance, crossover hop for distance and 6-metre timed hop were performed for both legs, and the Limb Symmetry Index (LSI) was calculated. Persistent patellar instability was self-reported as ‘Yes’ or ‘No’ at 12-month follow-up. Knee function in sport and recreational activities and knee-related quality of life were assessed at baseline and 12 months follow-up using the Knee injury and Osteoarthritis Outcome Score (KOOS). Results: LSI for the baseline single leg hop for distance and the triple hop for distance was significantly associated with persistent patellar instability at 12 months follow-up with an OR of 0.94 (95% CI 0.88 to 0.99) and OR of 0.91 (95% CI 0.84 to 0.99), respectively. No other statistically significant associations were detected. Conclusion: Individuals with higher LSI values for the single leg hop for distance and triple hop for distance conducted at baseline had lower odds for persistent patellar instability at 12 months follow-up. Clinicians can use results from these hop tests to assess the risk of future recurrent patellar instability prior to treatment. Study design: Retrospective cohort study.

• Lian, Ola; Randsborg, Per-Henrik; Jakobsen, Rune Bruhn; Bukholm, Ida Rashida Khan & Aae, Tommy Frøseth (2023). Prevalence of malpractice claims after arthroscopic shoulder surgery: analysis of 69,097 procedures from a national registry in Norway. Patient Safety in Surgery. 17, s. 1–6. doi: 10.1186/s13037-023-00378-5. Fulltekst i vitenarkiv Vis sammendrag

  Background Systematic analysis of compensation claims following patient injuries is helpful in improving patient safety. The objective of the current study was to assess compensation claims after arthroscopic treatment of rotator cuff ruptures, impingement, and acromioclavicular joint osteoarthritis reported to the Norwegian System of Patient Injury Compensation and evaluate if there was regional variation on the risk of patient injuries leading to an accepted compensation claim. Methods Data from the Norwegian System of Patient Injury Compensation and the Norwegian Patient Registry (NPR) from 2008 to 2018 were collected. Demographics (age and sex) and type of claim and reasons for accepted claims were obtained from the Norwegian System of Patient Injury Compensation, while the number of arthroscopic procedures was collected from NPR. The treating institutions were grouped on geography according to Norway’s four regional Health Trusts and private institutions and the effect of geography on the probability of an accepted claim was estimated. Results NPR registered 69,097 shoulder arthroscopies during the study period, of which 216 (0.3%) compensation claims were filed for patient injury. A total of 38% of the claims were accepted, representing 0.1% of the arthroscopic procedures. Infection (37.8%) was the most common reason for accepted claim, followed by no surgical indication (15.9%) and wrong surgical technique (12.2%). We found a statistically significantly increased odds ratio for a claim being accepted in both the smallest and largest regional Health Trusts compared to the other regional Health Trusts and private institutions. Conclusions Compensation claims due to patient injury following shoulder arthroscopy are rare (0.3% of patients file a claim, of which a third is accepted (0.1% of all shoulder arthroscopy patients)). The most common reason for accepted claim was infection followed by lack of indication.

• Hoseth, John Magne; Aae, Tommy Frøseth; Jakobsen, Rune Bruhn; Fenstad, Anne Marie; Bukholm, Ida Rashida Khan & Gjertsen, Jan-Erik [Vis alle 7 forfattere av denne artikkelen] (2023). Compensation Claims After Hip Fracture Surgery in Norway 2008-2018. Geriatric Orthopaedic Surgery & Rehabilitation (GOS). ISSN 2151-4585. 14, s. 1–7. doi: 10.1177/21514593231188623. Fulltekst i vitenarkiv Vis sammendrag

  Background Surgical complications contribute to the significant mortality following hip fractures in the elderly. The purpose of this study was to increase our knowledge of surgical complications by evaluating compensation claims following hip fracture surgery in Norway. Further, we investigated whether the size and location of performing institutions would influence surgical complications. Methods We collected data from the Norwegian System of Patient Injury Compensation (NPE) and the Norwegian Hip Fracture Register (NHFR) from 2008 to 2018. We classified institutions into 4 categories based on annual procedure volume and geographical location. Results 90,601 hip fractures were registered in NHFR. NPE received 616 (.7%) claims. Of these, 221 (36%) were accepted, which accounts for .2% of all hip fractures. Men had nearly a doubled risk of ending with a compensation claim compared to women (OR: 1.8, CI, 1.4-2.4, P < .001). Hospital-acquired infection was the most frequent reason for accepted claims (27%). However, claims were rejected if patients had underlying conditions predisposing to infection. Institutions treating fewer than 152 hip fractures (first quartile) annually, had a statistically significant increased risk (OR: 1.9, CI, 1.3-2.8, P = .005) for accepted claims compared to higher volume facilities. Discussion The fewer registered claims in our study could be due to the relatively high early mortality and frailty in this patient group, which may decrease the likelihood of filing a complaint. Men could have undetected underlying predisposing conditions that lead to increased risk of complications. Hospital-acquired infection may be the most significant complication following hip fracture surgery in Norway. Lastly, the number of procedures performed annually in an institution influences compensation claims. Conclusions Our findings indicate that hospital acquired infections need greater focus following hip fracture surgery, especially in men. Lower volume hospitals may be a risk factor.

• Årøen, Asbjørn; Brinchmann, Jan Engelsen; Engen, Cathrine N.; Randsborg, Per-Henrik; Engebretsen, Lars & Jakobsen, Rune Bruhn (2023). The Need for Pragmatic Registry-Based Trials in Cartilage Research. Cureus - Journal of Medical Science. doi: 10.13140/RG.2.2.28582.29767. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik; Cepeda, Nicholas; Adamec, Dakota; Rodeo, Scott A.; Ranawat, Anil & Pearle, Andrew D. (2022). Patient-Reported Outcome, Return to Sport, and Revision Rates 7-9 Years After Anterior Cruciate Ligament Reconstruction Results From a Cohort of 2042 Patients. American Journal of Sports Medicine. ISSN 0363-5465. 50(2), s. 423–432. doi: 10.1177/03635465211060333. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik; Årøen, Asbjørn & Owesen, Christian (2022). The Effect of Lesion Size on Pain and Function in Patients Scheduled for Cartilage Surgery of the Knee. Cartilage. ISSN 1947-6035. 13(2), s. 1–7. doi: 10.1177/19476035221109242. Fulltekst i vitenarkiv Vis sammendrag

  Objective Despite an increased interest in treatment options for cartilage lesions of the knee, the relationship between lesion characteristics and the symptoms they elicit is not well understood. We evaluated the relationship between lesion characteristics and the patient-reported outcome measures (PROMs) and compared this with symptoms reported by patients scheduled for knee ligament reconstruction and knee arthroplasty. Design Preoperative data, including Lysholm score and The Knee Injury and Osteoarthritis Outcome Score (KOOS), in 90 consecutive patients scheduled for surgery for symptomatic isolated cartilage lesions were prospectively collected. Result The patients had a mean age of 33.2 years. There were 62 (69%) males. There was no statistically significant difference in PROMs between patients with cartilage lesions smaller or larger than 2 cm 2 , except for the KOOS subscale symptoms, with patients with smaller lesions reporting higher scores, 62.8 (95% confidence interval [CI] 58.3-67.3) vs. 51.9 (95% CI 45.5-58.4), P = 0.005. There was a small correlation between lesion size and Lysholm score. However, when adjusted for age, sex, body mass index, and lesion localization, this effect was not statistically significant. The International Cartilage Regeneration &amp; Joint Preservation Society grade did not affect preoperative PROMs. Cartilage patients reported worse preoperative symptoms than patients scheduled for knee ligament reconstruction, and approaching the symptoms reported by patients scheduled for knee arthroplasty. Conclusion The size, depth, and location of cartilage lesions have little impact on the symptoms experienced by the patients. Cartilage patients have comparable symptoms to patients scheduled for knee arthroplasty.

• Straume-Næsheim, Truls Martin; Randsborg, Per-Henrik; Mikaelsen, Jan Rune & Årøen, Asbjørn (2022). Medial patellofemoral ligament reconstruction is superior to active rehabilitation in protecting against further patella dislocations. Knee Surgery, Sports Traumatology, Arthroscopy. ISSN 0942-2056. 30(10), s. 3428–3437. doi: 10.1007/s00167-022-06934-3. Fulltekst i vitenarkiv Vis sammendrag

  Purpose: Isolated reconstruction of the medial patellofemoral ligament (MPFL-R) has become the predominant stabilizing procedure in the treatment of recurrent lateral patellar dislocation (LPD). To minimize the risk of re-dislocations, isolated MPFL-R is recommended in patients with no significant trochlea dysplasia and tibial tuberosity trochlear groove distance < 20 mm on computed tomography (CT). Incidentally, these criteria are the same that are used to identify first time LPD patients where conservative treatment is recommended. The purpose of this study was therefore to compare MPFL-R with active rehabilitation for patients with recurrent LPD (RLPD) in absence of the above mentioned underlying anatomical high-risk factors for further patellar dislocations. Methods: RLPD-patients aged 12–30 without underlying anatomical high-risk factors for further LPD were randomized into treatment either with isolated MPFL-R or active rehabilitation provided and instructed by a physiotherapist. All patients underwent diagnostic arthroscopy for concomitant problems. The main outcome measure was persistent patellar instability at 12 months. Knee function at baseline and 12 months was asses using the following patient reported outcomes measures (PROMS); KOOS, Kujala, Cincinnati knee rating, Lysholm score and Noyes sports activity rating scale. Results: Between 2010 and 2019, 61 patients were included in the study (MPFL-R, N = 30, Controls, N = 31). Persistent patellar instability at 12 months was reported by 13 (41.9%) controls, versus 2 (6.7%) in the MPFL-group (RR 6.3 (95% CI 1.5–25.5). No statistically significant differences in activity level were found between the MPFL-group and the Controls at neither baseline nor follow up. The patients with persistent instability at 12 months did not score significantly lower on any of the PROMs compared to their stable peers, regardless of study group. Conclusion: Patients with recurrent patellar dislocations have a six-fold increased risk of persistent patellar instability if treated with active rehabilitation alone, compared to MPFL-R in combination with active rehabilitation, even in the absence of significant anatomical risk factors. Active rehabilitation of the knee without MPFL-R improves patient reported knee function after one year, but does not protect against persistent patellar instability.

• Randsborg, Per-Henrik; Jiang, Hongying; Mao, Jialin; Devlin, Vincent; Marinac-Dabic, Danica & Peat, Raquel [Vis alle 7 forfattere av denne artikkelen] (2022). Two-Year Revision Rates in Total Ankle Replacement Versus Ankle Arthrodesis: A Population-Based Propensity-Score-Matched Comparison from New York State and California. JBJS Open Access. 7(2). doi: 10.2106/JBJS.OA.21.00136. Fulltekst i vitenarkiv
• Jiang, Hongying; Wu, Leihong; Randsborg, Per-Henrik; Houck, Jennifer; Sun, Limin & Marine, Marissa [Vis alle 9 forfattere av denne artikkelen] (2022). Analysis of Polyethylene-Related Revisions After Total Ankle Replacements Reported in US Food and Drug Administration Medical Device Adverse Event Database. Foot & ankle international. ISSN 1071-1007. 44(1), s. 13–22. doi: 10.1177/10711007221134284. Fulltekst i vitenarkiv
• Clementsen, Ståle; Jakobsen, Rune Bruhn; Hammer, Ola-Lars & Randsborg, Per-Henrik (2022). The Effect of Ulnar Styloid Fractures on Patient-Reported Outcomes After Surgically Treated Distal Radial Fractures. JBJS Open Access. 7(3). doi: 10.2106/JBJS.OA.22.00021. Fulltekst i vitenarkiv Vis sammendrag

  Background: Ulnar styloid fractures (USFs) are often associated with distal radial fractures (DRFs). When unstable DRFs are treated surgically, any associated USF is most commonly left untreated. The purpose of this study was to evaluate the effect of a concomitant USF on outcome after surgical stabilization of a DRF. Methods: Data from 2 randomized controlled trials on the treatment of unstable DRFs were pooled. The effect of a USF on the QuickDASH, EQ-5D, pain, and range of motion at 2 years was evaluated. Results: Two hundred and eighty-one patients were included; 177 (63%) had an associated, untreated USF. An unadjusted analysis demonstrated no significant difference in functional or patient-reported outcome measures (PROMs) at 2 years between patients with or without a concomitant USF. When controlling for confounding factors, the presence of a USF did not predict change in any of the PROMs from baseline to 2 years. A concomitant USF also did not predict change in grip strength or range of motion, except for a small effect on extension (−4.1°; 95% confidence interval, −7.5° to −0.8°; p = 0.02), which probably does not have clinical relevance. Conclusions: A USF in combination with a DRF does not affect PROMs, range of motion, or grip strength. We recommend that concomitant USFs be left untreated when treating a DRF with surgical fixation.

• Hammer, Ola-Lars; Jakobsen, Rune Bruhn; Benth, Jurate Saltyte & Randsborg, Per-Henrik (2021). Can Generic Outcome Questionnaires Replace QuickDASH in Monitoring Clinical Outcome Following Surgical Treatment of Distal Radius Fractures? Journal of Hand Surgery-American Volume. ISSN 0363-5023. 47(1), s. 92.e1–92.e9. doi: 10.1016/j.jhsa.2021.03.024. Fulltekst i vitenarkiv Vis sammendrag

  Purpose In contrast to region-specific patient-reported outcome measures (PROMs), generic PROMs can be argued to have an added benefit of enabling cost-utility analyses and allowing for comparisons to be made across different conditions. The aim of this study was to assess the responsiveness and strength of the association between region-specific and generic PROMs in patients treated operatively for a displaced intra-articular distal radius fracture. Methods Over a 4-year period, 166 patients aged 18–70 years with a displaced intra-articular fracture of the distal radius were treated with either a volar locking plate or external fixation augmented by K-wires and followed-up prospectively for 2 years. The main outcome measure was the Quick Disabilities of the Arm, Shoulder, and Hand (QuickDASH) score, but EuroQol-5D (EQ-5D) and 36-Item Short Form Survey (SF-36) were also employed. The associations between the QuickDASH score and EQ-5D and between the QuickDASH score and SF-36 were assessed using a linear mixed model. Results There was a significant positive association between the QuickDASH score and EQ-5D and between the QuickDASH score and SF-36 throughout the follow-up period, although wide dispersion existed for the outcome measures at an individual level. However, the association between the QuickDASH score and SF-36 was significantly weaker at 6 weeks and 3 months than that at baseline, indicating that EQ-5D more closely mirrors changes in the QuickDASH score in the early postoperative period. Conclusions The study demonstrates that the QuickDASH score and EQ-5D correlate well on a group level, but large individual variations exist. The SF-36 had decreased sensitivity for the changes in the QuickDASH score at 6 weeks and 3 months. Clinical relevance Our findings indicate that generic PROMs cannot fully replace the region-specific QuickDASH score when evaluating the outcomes of distal radius fractures.

• Randsborg, Per-Henrik; Adamec, Dakota; Cepeda, Nicolas; Pearle, Andrew & Ranawat, Anil (2021). Differences in Baseline Characteristics and Outcome Among Responders, Late Responders, and Never-Responders After Anterior Cruciate Ligament Reconstruction. American Journal of Sports Medicine. ISSN 0363-5465. doi: 10.1177/03635465211047858. Fulltekst i vitenarkiv
• Banitalebi, Hasan; Owesen, Christian; Årøen, Asbjørn; Tran, Hang Thi; Myklebust, Tor Åge & Randsborg, Per-Henrik (2021). Is T2 mapping reliable in evaluation of native and repair cartilage tissue of the knee? Journal of Experimental Orthopaedics. 8, s. 1–10. doi: 10.1186/s40634-021-00350-1. Fulltekst i vitenarkiv Vis sammendrag

  Purpose: To evaluate the effect of imaging plane and experience of observers on the reliability of T2 mapping of native and repair cartilage tissue of the knee. Methods: Fifteen consecutive patients from two randomised controlled trials (RCTs) were included in this crosssectional study. Patients with an isolated knee cartilage lesion were randomised to receive either debridement or microfracture (RCT 1) or debridement or autologous chondrocyte implantation (RCT 2). T2 mapping was performed in coronal and sagittal planes two years postoperatively. A musculoskeletal radiologist, a resident of radiology and two orthopaedic surgeons measured the T2 values independently. Intraclass Correlation Coefficient (ICC) with 95% Confidence Intervals was used to calculate the inter- and intraobserver agreement. Results: Mean age for the patients was 36.8 ± 11 years, 8 (53%) were men. The overall interobserver agreement varied from poor to good with ICCs in the range of 0.27– 0.76 for native cartilage and 0.00 – 0.90 for repair tissue. The lowest agreement was achieved for evaluations of repair cartilage tissue. The estimated ICCs suggested higher interand intraobserver agreement for radiologists. On medial femoral condyles, T2 values were higher for native cartilage on coronal images (p < 0.001) and for repair tissue on sagittal images (p < 0.001). Conclusions: The reliability of T2 mapping of articular cartilage is influenced by the imaging plane and the experience of the observers. This influence may be more profound for repair cartilage tissue. This is important to consider when using T2 mapping to measure outcomes after cartilage repair surgery.

• Aae, Tommy Frøseth; Jakobsen, Rune Bruhn; Bukholm, Ida Rashida Khan; Fenstad, Anne Marie; Furnes, Ove Nord & Randsborg, Per-Henrik (2021). Compensation claims after hip arthroplasty surgery in Norway 2008–2018. Acta Orthopaedica. ISSN 1745-3674. 92(3), s. 311–315. doi: 10.1080/17453674.2021.1872901. Fulltekst i vitenarkiv Vis sammendrag

  Background and purpose — Orthopedic surgery is one of the specialties with most compensation claims, therefore we assessed the most common reasons for complaints following total hip arthroplasty (THA) reported to the Norwegian System of Patient Injury Compensation (NPE) and viewed these complaints in light of the data from the Norwegian Arthroplasty Register (NAR). Patients and methods — We collected data from NPE and NAR for the study period (2008–2018), including age, sex, and type of complaint, and reason for accepted claims from NPE, and the number of arthroplasty surgeries from NAR. The institutions were grouped by quartiles into quarters according to annual procedure volume, and the effect of hospital procedure volume on the risk for accepted claim was estimated. Results — 70,327 THAs were reported to NAR. NPE handled 1,350 claims, corresponding to 1.9% of all reported THAs. 595 (44%) claims were accepted, representing 0.8% of all THAs. Hospital-acquired infection was the most common reason for accepted claims (34%), followed by wrong implant position in 11% of patients. Low annual volume institutions (less than 93 THAs per year) had a statistically significant 1.6 times higher proportion of accepted claims compared with higher volume institutions. Interpretation — The 0.8% risk of accepted claims following THAs is 1.6 times higher for patients treated in low-volume institutions, which should consider increasing the volume of THAs or referring these patients to higher volume institutions.

• Randsborg, Per-Henrik; Adamec, Dakota; Cepeda, Nicolas & Ling, Daphne (2021). Two-Year Recall Bias After ACL Reconstruction Is Affected by Clinical Result. JBJS Open Access. doi: 10.2106/JBJS.OA.20.00164. Fulltekst i vitenarkiv
• Kunze, Kyle N.; Polce, Evan; Ranawat, Anil; Randsborg, Per-Henrik; Williams, Riley 3rd & Allen, Answorth [Vis alle 7 forfattere av denne artikkelen] (2021). Application of Machine Learning Algorithms to Predict Clinically Meaningful Improvement After Arthroscopic Anterior Cruciate Ligament Reconstruction. Orthopaedic Journal of Sports Medicine (OJSM). doi: 10.1177/23259671211046575. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik; Aae, Tommy Frøseth; Bukholm, Ida Rashida Khan; Fenstad, Anne Marie; Furnes, Ove Nord & Jakobsen, Rune Bruhn (2021). Compensation claims after knee arthroplasty surgery in Norway 2008–2018. Acta Orthopaedica. ISSN 1745-3674. 92(2), s. 189–193. doi: 10.1080/17453674.2020.1871187. Fulltekst i vitenarkiv Vis sammendrag

  Background and purpose — Orthopedic surgery is one of the specialties with most compensation claims. We assessed the claims following knee arthroplasty surgery reported to the Norwegian System of Patient Injury Compensation (NPE) in light of institutional procedure volume. Patients and methods — We collected data from NPE and the Norwegian Arthroplasty Register (NAR) for the study period (2008–2018). Age, sex, type of claim, and reason for compensation were collected from NPE, while the number of arthroplasty surgeries was collected from NAR. The treating hospitals were grouped by quartiles according to annual procedure volume. The effect of hospital volume on the likelihood of an accepted claim was estimated. Results — NAR received 64,241 reports of arthroplasty procedures, of which 572 (0.9%) patients filed a claim for treatment injury. 55% of the claims were accepted, representing 0.5% of all knee arthroplasties. The most common reason for accepted claim was a hospital-acquired infection, in 28% of the patients, followed by misplaced implant (26%) and aseptic loosening (13%). The hospitals with the lowest annual volume (57 or fewer arthroplasties per year, first quarter) had a statistically significantly larger fraction of granted claims per procedures compared with other institutions. Interpretation — The overall risk of ending up with compensation due to treatment error following knee arthroplasty was 0.5%. The risk of accepted claim was greater for patients operated in the lowest volume hospitals.

• Liebeskind, Alexander Y.; Nieuwenhuijse, Marc; Hyde, Jensen H.; Chen, Amanda C.; Aryal, Suvekshya & Randsborg, Per-Henrik (2021). Joint effort: a call for standardization in total joint arthroplasty data reporting. BMJ Surgery, Interventions, & Health Technologies. 3(1). doi: 10.1136/bmjsit-2021-000079. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik & Chen, Amanda| (2021). How much is enough? Finding the minimum annual surgical volume threshold for total knee replacement. BMJ Surgery, Interventions, & Health Technologies. 3(1). doi: 10.1136/bmjsit-2021-000092. Fulltekst i vitenarkiv
• Aae, Tommy Frøseth; Lian, Øystein Bjerkestrand; Årøen, Asbjørn; Engebretsen, Lars & Randsborg, Per-Henrik (2020). Compensation claims after knee cartilage surgery is rare. A registry-based study from Scandinavia from 2010 to 2015. BMC Musculoskeletal Disorders. 21, s. 1–8. doi: 10.1186/s12891-020-03311-4. Fulltekst i vitenarkiv Vis sammendrag

  Background: Focal cartilage defects (FCDs) in the knee joint has a high prevalence. A broad range of treatment options exists for symptomatic patients. Knowledge of patient compensation claims following surgical treatment of FCDs is missing. The purpose of this study is to evaluate compensation claims filed to the Scandinavian registries for patient compensation following treatment of FCDs in the knee joint from 2010 to 2015 and identify possible areas of improvement. Methods: A cross-sectional study design was used to obtain all complaints following surgical treatment of FCDs from the Scandinavian registries from 2010 to 2015. Data such as age, gender, type of treatment, type of complaint, reason of verdict and amount of compensation were collected and systematically analyzed. Results: 103 patients filed a compensation claim. 43 had received debridement (41.7%), 54 microfracture (MF) (52.4%), 3 mosaicplasty (2.9%) and 3 autologous chondrocyte implantation (ACI) (2.9%). Of the 103 claims, 36 were granted (35%). 21 following debridement (58.3%), 13 after MF (36.1%), 1 following mosaicplasty (2.8%) and 1 after ACI (2.8%). The most common reason for complaint was infection (22.1%), of which 89% were granted. The average compensation was €24.457 (range €209 – €458.943). Conclusion: Compensation claims following surgical treatment of knee cartilage injuries in Scandinavia are rare. Establishing nationwide cartilage registries can add further knowledge on this troublesome disease.

• Kjennvold, Stian; Randsborg, Per-Henrik; Jakobsen, Rune Bruhn & Årøen, Asbjørn (2020). Fixation of acute chondral fractures in adolescent knees. Cartilage. ISSN 1947-6035. s. 1–9. doi: 10.1177/1947603520941213. Fulltekst i vitenarkiv
• Kjennvold, Stian; Randsborg, Per-Henrik; Jakobsen, Rune Bruhn & Årøen, Asbjørn (2020). Fiksasjon av akutte chondrale frakturer i kne. I Hansen, Ann Kristin (Red.), Høstmøteboka 2020. Norsk Ortopedisk Forening. ISSN 9788299427524. s. 31–31. Fulltekst i vitenarkiv
• Hammer, Ola-Lars; Jakobsen, Rune Bruhn; Clementsen, Ståle; Fuglesang, Hendrik Frølich; Bjørnelv, Gudrun Maria Waaler & Randsborg, Per-Henrik (2020). Cost-Effectiveness of Volar Locking Plate Compared with Augmented External Fixation for Displaced Intra-Articular Wrist Fractures. Journal of Bone and Joint Surgery. American volume. ISSN 0021-9355. 102(23), s. 2049–2059. doi: 10.2106/JBJS.19.01288. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik; Tajet, Jonas; Negård, henrik & Røtterud, Jan H (2020). Manipulation under Anesthesia for Stiffness of the Knee Joint after Total Knee Replacement. Arthroplasty Today. 6(3), s. 470–474. doi: 10.1016/j.artd.2020.05.019. Fulltekst i vitenarkiv Vis sammendrag

  Background Stiffness of the knee joint is a feared complication after total knee replacement (TKR). An initial noninvasive treatment option is the manipulation of the knee under anesthesia (MUA). The purpose of this study is to evaluate the midterm result of the MUA for joint stiffness after primary TKR. Methods Patients treated with the MUA for knee stiffness after primary TKR surgery performed at Akershus University Hospital during 2014-2018 were invited to a follow-up clinic. The range of motion (ROM) of the knee joint was measured using a goniometer, and the patients reported the Lysholm score, Knee injury and Osteoarthritis Outcome Score, and Tegner score. In addition, any complications or reoperation after the MUA was noted. Results A total of 24 patients were identified in the journal system at the hospital. Twenty-three of these (17 women and 6 men) attended the designated follow-up on average 26 months (range [r], 16-35) after the MUA. The total ROM was 97° (r, 84°-116°) at the time of follow-up, compared with 70° (r, 50°-80°) before the MUA (P

• Randsborg, Per-Henrik (2020). Orthopaedic Surgeons Are Doctors Too. Commentary on an article by Deena Kishawi, BS, et al.: “Low Preoperative Albumin Levels Predict Adverse Outcomes After Total Joint Arthroplasty”. Journal of Bone and Joint Surgery. American volume. ISSN 0021-9355. 102(10). doi: 10.2106/JBJS.20.00192. Fulltekst i vitenarkiv
• Clementsen, Ståle; Hammer, Ola-Lars; Benth, Jurate Saltyte; Jakobsen, Rune Bruhn & Randsborg, Per-Henrik (2019). Early Mobilization and Physiotherapy Vs. Late Mobilization and Home Exercises After ORIF of Distal Radial Fractures. JBJS Open Access. 4(3). doi: 10.2106/JBJS.OA.19.00012. Fulltekst i vitenarkiv Vis sammendrag

  Background: Volar locking plates have permitted early mobilization, omitting the need for prolonged cast immobilization, after distal radial fractures (DRFs). However, the type of rehabilitation following plate fixation of DRFs remains an unresolved issue. The purpose of this study was to evaluate the effect of physiotherapy after volar plate fixation of DRFs. At a 2-year follow-up, we compared the results of immediate physiotherapy (early mobilization) with those of home exercises following 2 weeks in a dorsal plaster splint (late mobilization). Methods: Patients with an extra-articular DRF scheduled for open reduction and internal fixation (ORIF) with a volar locking plate were evaluated for eligibility for enrollment in the study. The patients were randomized into 2 groups: (1) early mobilization and physiotherapy and (1) late mobilization and home exercise. In the early mobilization group, the plaster splint was removed after 2 to 3 days. During the first 3 months, the patients met with the institution’s physiotherapist every other week. The late mobilization group wore the dorsal splint for 2 weeks and only met with our physiotherapist once, when the splint was removed. This group was provided with a home physiotherapy program and instructed to perform home exercises on their own. Results: One hundred and nineteen patients were included in the study. The 2 groups had similar demographics with respect to age, sex, and baseline values. Seven patients were lost to follow-up. No clinically relevant difference in scores on the shortened version of the Disabilities of the Arm, Shoulder and Hand (QuickDASH) questionnaire was found between the 2 groups at any of the follow-up evaluations. The largest difference in the QuickDASH score was found at 6 weeks, when the early mobilization group had a mean score of 30 compared with a mean of 37 in the late mobilization group (p = 0.05). Conclusions: Early mobilization and multiple physiotherapy visits did not improve wrist function compared with standard treatment of 2 weeks in a dorsal plaster splint, a single physiotherapy visit, and home exercises. Early mobilization following ORIF of an extra-articular DRF is safe.

• Randsborg, Per-Henrik (2019). Making Omelets without Breaking Eggs Commentary on an article by Gregory S. Kazarian, AB, et al.: “The Impact of Surgeon Volume and Training Status on Implant Alignment in Total Knee Arthroplasty”. Journal of Bone and Joint Surgery. American volume. ISSN 0021-9355. 101(19), s. e104–e104. doi: 10.2106/JBJS.19.00740. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik; Kjennvold, Stian & Røtterud, Jan H (2019). Arthroscopic Fixation of Osteochondritis Dissecans of the Knee Using a Motorized Pick and Headless Compression Screws. Arthroscopy Techniques. s. e1–e6. doi: 10.1016/j.eats.2019.05.031. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik (2019). Unstable Osteochondritis Dissecans in the Mature Knee: Internal Fixation Works, But We Need More Data. Arthroscopy: The Journal of Arthroscopy And Related. ISSN 0749-8063. s. 2523–2524. doi: 10.1016/j.arthro.2019.05.040. Fulltekst i vitenarkiv
• Straume-Næsheim, Truls Martin; Randsborg, Per-Henrik; Mikaelsen, Jan Rune; Sivertsen, Einar; Devitt, Brian M. & Granan, Lars-Petter [Vis alle 7 forfattere av denne artikkelen] (2019). Recurrent lateral patella dislocation affects knee function as much as ACL deficiency – however patients wait five times longer for treatment. BMC Musculoskeletal Disorders. 20. doi: 10.1186/s12891-019-2689-7. Fulltekst i vitenarkiv Vis sammendrag

  Background: Surgical treatment of young patients with recurrent lateral patella dislocation (RLDP) is often recommended because of loss of knee function that compromises their level of activity or even their daily life functioning. This situation is comparable to young patients with an anterior cruciate ligament (ACL) rupture. The purpose of this study was therefore to explore the time from injury to surgery and the pre-operative symptoms and knee function of young RLPD patients scheduled for stabilizing surgery and compare this group to age and sex-matched ACL-deficient patients. Method: Forty-seven patients with unilateral RLPD listed for isolated medial patellofemoral ligament reconstruction were included in the study (RLPD-group). This group was compared to an age, sex and BMI matched ACL patient group obtained from the Norwegian knee ligament registry (ACL-group) for the following outcome measures: the knee injury and osteoarthritis outcome score (KOOS) assessed on the day of surgery and time from injury to surgery. Results: The RLPD-group scored significantly lower than the ACL-group for the three KOOS subscales “Pain” (73.6 vs. 79.8, p < 0.05), “Symptoms” (71.7 vs. 79.3, p < 0.05) and “ADL” (84.7 vs 89.5, p < 0.05). The lowest KOOS values were found for Sports/Recreation (53.5 vs. 51.3, p = 0.65) and Quality of life (37.6 vs. 36.7, p = 0.81). The average time from primary injury to surgery was 6 months for the ACL group and 31 months for the RLPD group. Conclusion: RLPD affected knee function as much as ACL deficiency, and was associated with more pain. Still the RLDP patients waited on average 5 times longer for surgery.

• Hammer, Ola-Lars; Clementsen, Ståle; Hast, Joakim Aasli; Benth, Jurate Saltyte; Madsen, Jan Erik & Randsborg, Per-Henrik (2019). Volar Locking Plates Versus Augmented External Fixation of Intra-Articular Distal Radial Fractures - Functional Results from a Randomized Controlled Trial. Journal of Bone and Joint Surgery. American volume. ISSN 0021-9355. 101(4), s. 311–321. doi: 10.2106/JBJS.18.00014. Fulltekst i vitenarkiv
• Fuglesang, Hendrik Frølich; Flugsrud, Gunnar B; Randsborg, Per-Henrik; Hammer, Ola-Lars & Utvåg, Stein-Erik (2018). Five-Year Follow-up Results of a Randomized Controlled Study Comparing Intramedullary Nailing with Plate Fixation of Completely Displaced Midshaft Fractures of the Clavicle in Adults. JBJS Open Access. 3(4). doi: 10.2106/JBJS.OA.18.00009. Fulltekst i vitenarkiv Vis sammendrag

  Background: Surgical management of completely displaced midshaft fractures of the clavicle is becoming more frequent, although long-term follow-up with Level-I evidence is scarce. Plate fixation (PF) of comminuted fractures provides faster functional recovery than elastic stable intramedullary nailing (ESIN). The 12-month follow-up of this randomized controlled trial, published previously, found no clinical differences at that time on the group level, but subtle differences on the subgroup level indicated that the results after closed ESIN were better than those after open ESIN. The primary aim of the study reported here was to compare the long-term clinical outcomes and sequelae after open reduction with those after closed reduction and to help surgeons develop a treatment strategy of either PF or ESIN for selected patients. Methods: At a median follow-up of 66 months (range, 49 to 89 months), the 123 patients in the original study were invited to an online secure survey. We used the survey results to compare the PF and ESIN treatment arms and to perform predetermined subgroup analyses of closed compared with open ESIN in relation to Disabilities of the Arm, Shoulder and Hand (DASH) score, pain assessment, and implant removal. Results: The questionnaire was completed by 114 (93%) of the 123 patients. There were no differences between the 2 treatment arms with regard to the DASH score (ESIN, 3.1 ± 7.0 and PF, 3.7 ± 7.5; p = 0.9). The 27 patients who had been treated with closed ESIN had a significantly superior DASH score compared with the 27 patients who had been treated with open ESIN (closed, 0.7 ± 1.4 and open, 5.2 ± 8.9; p = 0.015) and compared with the patients who had been treated with PF (closed ESIN, 0.7 ± 1.4 and PF, 3.9 ± 7.5; p = 0.002). Patients who had been treated with closed ESIN also reported fewer sequelae than patients who had been treated with open ESIN or PF. Conclusions: The results of this study, combined with those of our prior 1-year follow-up of the same patients, indicate that it seems to be advantageous to perform closed ESIN. The long-term results after PF were similar to those after open ESIN, but PF resulted in faster functional recovery and fewer patients needing to have the implant removed. Therefore, if open reduction is necessary for a comminuted fracture, it seems that the advantages of the minimally invasive ESIN procedure are lost, and the surgeon should consider conversion to PF. Level of Evidence: Therapeutic Level I. See Instructions for Authors for a complete description of levels of evidence.

• Ananthaharan, Archana & Randsborg, Per-Henrik (2018). Epidemiology and patient-reported outcome after juvenile osteochondritis dissecans in the knee. Knee (Oxford). ISSN 0968-0160. 25(4), s. 595–601. doi: 10.1016/j.knee.2018.02.005. Fulltekst i vitenarkiv
• Clementsen, Ståle; Hammer, Ola-Lars; Engebretsen, Erik; Jakobsen, Rune Bruhn & Randsborg, Per-Henrik (2018). Compensation after distal radial fractures. A review of 800 claims to the Norwegian system of patient injury compensation 2000-2013. The Open Orthopaedics Journal. doi: 10.2174/1874325001812010419. Fulltekst i vitenarkiv
• Oksum, Mads Anders & Randsborg, Per-Henrik (2018). Treatment of instability of the proximal tiobiofibular joint dynamic internal fixation with a suture button. Arthroscopy Techniques. 7(10), s. 1057–1061. doi: 10.1016/j.eats.2018.08.004. Fulltekst i vitenarkiv
• Oppebøen, Sjur; Wikerøy, Annette Konstanse Bordewich; Fuglesang, Hendrik Frølich; Dolatowski, Filip Celestyn & Randsborg, Per-Henrik (2018). Calcar screws and adequate reduction reduced the risk of fixation failure in proximal humeral fractures treated with a locking plate: 190 patients followed for a mean of 3 years. Journal of Orthopaedic Surgery and Research. 13(197). doi: 10.1186/s13018-018-0906-y. Fulltekst i vitenarkiv Vis sammendrag

  Background Fixation of proximal humeral fractures (PHF) with locking plates has gained popularity over conservative treatment, but surgery may be complicated with infection, non-union, avascular necrosis (AVN) of the humeral head and fixation failure. Failure to achieve structural support of the medial column has been suggested to be an important risk factor for fixation failure. The aims of this study were to examine the effect of calcar screws and fracture reduction on the risk of fixation failure and to assess long-term shoulder pain and function. Methods This was a single-centre retrospective study of 190 adult PHF patients treated with a locking plate between 2011 and 2014. Reoperations due to fixation failure were the primary outcome. Risk factors for fixation failure were assessed using the Cox regression analysis. Postoperative shoulder pain and function were assessed by the Oxford Shoulder Score (OSS). Results Thirty-one of 190 (16%) patients underwent a reoperation: 14 (7%) due to fixation failure, 10 (5%) due to deep infection and 2 (1%) due to AVN. The absence of calcar screws and fixation with residual varus malalignment (head-shaft angle < 120°) both increased the risk of fixation failure with an adjusted hazard ratio (95% CI) of 8.6 (1.9–39.3; p = 0.005) and 4.9 (1.3–17.9; p = 0.02), respectively. The median (interquartile range) OSS was 40 (27–46). Conclusion The use of calcar screws, as well as the absence of postoperative varus malalignment, significantly reduced the risk of fixation failure. We, therefore, recommend the use of calcar screws and to avoid residual varus malalignment to improve the medial support of proximal humeral fractures treated with a locking plate.

• Solvang, Håkon; Nordheggen, Robin Andre; Clementsen, Ståle; Hammer, Ola-Lars & Randsborg, Per-Henrik (2018). Epidemiology of distal radius fracture in Akershus, Norway, in 2010-2011. Journal of Orthopaedic Surgery and Research. 13(199). doi: 10.1186/s13018-018-0904-0. Fulltekst i vitenarkiv Vis sammendrag

  Background Several studies published over the last decade indicate an increased incidence of distal radius fractures (DRF). With Norway having one of the highest reported incidence of DRFs, we conducted a study to assess the epidemiology of DRFs and its treatment in the catchment area of Akershus University Hospital (AHUS). Methods Patients 16 years or older who presented to AHUS with an acute DRF during the years 2010 and 2011 were prospectively recorded and classified according to the AO fracture classification system. The mechanism of injury and treatment modality were noted. Results Overall, 1565 patients with an acute DRF presented to the institution in 2010–2011, of which 1134 (72%) were women. The overall annual incidence was 19.7 per 10,000 inhabitants 16 years or older. Women had an exponential increase in incidence after the age of 50, though the incidence for both genders peaked after the age of 80 years. There was an even distribution between extra- and intra-articular fractures. Falling while walking outside was the most common mechanism of injury. Of the 1565 registered, 418 (26.7%) patients underwent surgery, with a volar locking plate being the preferred surgical option in 77% of the cases. Conclusion The overall incidence of distal radius fractures was lower in our study than earlier reports from Norway. Postmenopausal women had a higher risk of fracture than the other groups, and low-energy injuries were most dominant. 26.7% were treated operatively, which is higher than earlier reports, and might reflect an increasing preference for surgical treatment.

Se alle arbeider i NVA

• Randsborg, Per-Henrik & Bukholm, Ida Rashida Khan (2023). Vern om ordningen med pasientskadeerstatning. 143(1). doi: 10.4045/tidsskr.22.0710. Fulltekst i vitenarkiv Vis sammendrag

  Vi må kunne skille mellom pasientskader som følge av feilbehandling og kriminelle handlinger som bør vurderes av domstolene. Dersom helsepersonell risikerer sivil straffeforfølgelse etter en feilbehandling, vil det ha betydelige konsekvenser for helsevesenet.

• Randsborg, Per-Henrik; Kalager, Guro; Owe, Jone Furulund; Thorsen, Elin Vermelid; Josefsen, Roger & Löffeler, Sven [Vis alle 7 forfattere av denne artikkelen] (2023). Tannløse spesialitetskomitéer. Tidsskrift for Den norske legeforening (Tidsskriftet). ISSN 0029-2001. 143(15), s. 1–3. doi: 10.4045/tidsskr.23.0600. Fulltekst i vitenarkiv
• Lian, Ole Kristian; Randsborg, Per-Henrik; Bukholm, Ida Rashida Khan & Aae, Tommy Frøseth (2023). En gjennomgang av erstatningskrav etter artroskopisk skulderkirurgi i Norge 2008 – 2018. Fulltekst i vitenarkiv
• Straume-Næsheim, Truls Martin; BANITALEBI, HASAN; Årøen, Asbjørn & Randsborg, Per-Henrik (2023). Endring i rotasjonsforholdet mellom femur og tibia under den pubertalen veksspurten hos pasienter med patellaluksasjonsproblematikk. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik (2023). Evidence-based objective performance criteria for the evaluation of hip and knee replacement devices and technologies. Fulltekst i vitenarkiv
• Hauksson, Ingi Thor; Havdal, Morten; Hoelsbrekken, Sigurd Erik & Randsborg, Per-Henrik (2023). Clostridium collagenase histolyticum vs. nåletomi for Dupytren’s kontraktur i MCP leddet. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik; Brinchmann, Jan Engelsen; Owesen, Christian; Engebretsen, Lars; Birkenes, Thomas & Hanvold, Heidi Andreassen [Vis alle 8 forfattere av denne artikkelen] (2023). Bruskcelletransplantasjon vs. artroskopisk debridement av isolerte bruskskader i kneleddet. En RCT med 2 års oppfølging. Fulltekst i vitenarkiv
• Mikaelsen, Jan Rune; Jakobsen, Rune Bruhn; Fenstad, Anne Marie & Randsborg, Per-Henrik (2023). EFFEKTEN AV KROPPMASSEINDEKS (KMI) PÅ REVISJONSRATEN 2 – 7 ÅR ETTER KNEPROTESE. Fulltekst i vitenarkiv
• Sailer, Monica & Randsborg, Per-Henrik (2023). Innføring av standardisert pasientforløp for behandling av diabetiske fotsår reduserte antall amputasjoner og ga kortere liggetid på sykehus. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik; Aae, Tommy Frøseth; Bukholm, Ida Rashida Khan & Jakobsen, Rune Bruhn (2023). Pasientskadeerstatninger etter hallux valgus korreksjon i Norge fra 2010 til 2020. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik & Bukholm, Ida Rashida Khan (2023). Tilsvar til debattartikkel av advokatene Jerstad og Haukalid. 143(4). doi: 10.4045/tidsskr.23.0132. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik (2023). Hva skal vi drive med? Fulltekst i vitenarkiv
• Wikerøy, Annette Konstanse Bordewich; Jakobsen, Rune Bruhn; Fuglesang, Hendrik Frølich & Randsborg, Per-Henrik (2023). Tittel Intramedullær nagling versus Platefiksasjon av dislokerte 3 og 4 parts proksimale humerusfrakturer, en single senter randomisert kontrollert studie. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik; Jiang, Hongying; Wu, Leihong; Houck, Jennifer; Sun, Linim & Marine, Marisa [Vis alle 7 forfattere av denne artikkelen] (2022). Risiko for tidlig revisjon etter ankelprotese med fixed eller mobil bearing plastkomponent En analyse fra FDAs MAUDE database. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik (2022). Vi står på skuldrene til kjemper. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik; Aryal, Suvekshya; Zheng, Xinyan; Mao, Jialin; Marinac-Dabic, Danica & Devlin, Vincent [Vis alle 9 forfattere av denne artikkelen] (2022). Kjønnsforskjeller i risiko for tidlig revisjon etter kneprotese. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik (2022). Autologous Chondrocyte Implantation. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik (2022). Machine Learning for å forutsi klinisk meningsfull forbedring etter korsbåndsrekonstruksjon. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik (2022). Norwegian Catilage Project Status Update. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik (2022). Effekten av bruskskadens størrelse på pasientrapporterte symptomer. En studie fra Norwegian Cartilage Project. Fulltekst i vitenarkiv
• Straume-Næsheim, Truls Martin; Randsborg, Per-Henrik & Årøen, Asbjørn (2022). Medial patellofemoral ligament reconstruction vs conservative treatment for recurrent lateral patellar dislocation - 3 years results from a randomized control trail. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik (2021). Is It Time to Consider Single-Stage Revision for Periprosthetic Joint Infections After Total Knee Replacement?: Commentary on an article by Louis Dagneaux, MD, et al.: "Acute Kidney Injury When Treating Periprosthetic Joint Infections After Total Knee Arthroplasties with Antibiotic-Loaded Spacers. Incidence, Risks, and Outcomes ". Journal of Bone and Joint Surgery. American volume. ISSN 0021-9355. 103(9), s. e37–e37. doi: 10.2106/JBJS.21.00111. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik; Jiang, Hongying; Mao, Jialin; Devlin, Vincent; Peat, Raquel & Sedrakyan, Art (2021). Ankelprotese versus Artrodese – en befolkningsbasert propensity score-matched sammenligning fra New York og California. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik & Jiang, Hongying (2021). Compare Revision Rates in Total Ankle Replacements Versus Ankle Arthrodesis Using Claims Data. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik (2021). Epidemiologi og behandling av barnebrudd og Osteochondritis Dissecans. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik; Cepeda, Nicolas; Adamec, Dakota; Rodeo, Scott; Ranawat, Anil & Pearle, Andrew (2021). Pasientrapportert resultat, retur til idrett og revisjonsrate 7-9 år etter rekonstruksjon av fremre korsbånd. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik; Adamec, Dakota; Cepeda, Nicolas; Pearle, Andrew & Ranawat, Anil (2021). Differences in Baseline Characteristics and Outcome between Responders, Late-Responders and Never-Responders after Anterior Cruciate Ligament Reconstruction. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik (2020). Koronakrisen forsterker klasseskillet i New York. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik (2020). Hvor ble det av den forskende klinikeren? 20, s. 18–19. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik (2020). Korona New York. 20(3), s. 32–34. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik (2020). Should we do more unicompartemental knee replacements? Journal of Bone and Joint Surgery. American volume. ISSN 0021-9355. doi: 10.2106/JBJS.20.00059. Fulltekst i vitenarkiv
• Årøen, Asbjørn; Kjennvold, Stian; Brinchmann, Jan E.; Randsborg, Per-Henrik; Reinholt, Finn P. & Engebretsen, Lars (2019). Bone marrow derived mesenchymal stem cells in a human clinical trial to repair articular cartilage defects of the knee. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik (2019). From pediatric fractures to cartilage surgery. Orthopaedic Research at Akershus University Hospital, Norway. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik (2019). ACL registry Research. Data Collection, compliance and Choice of outcome measures. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik; Tajet, Jonas; Negård, Henrik & Røtterud, Jan H (2019). Manipulasjon under anestesi (MUA) for stivhet etter kneprotese. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik (2018). Konvertering fra kneartrodese til kneprotese – et pasientkasus. Fulltekst i vitenarkiv
• Aae, Tommy Frøseth; Lian, Øystein Bjerkestrand; Årøen, Asbjørn & Randsborg, Per-Henrik (2018). Pasienterstatning etter bruskkirurgi i kneleddet i Skandinavia fra 2010 til 2015. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik (2018). Bruskskader. De desperate 40 åringene. Fulltekst i vitenarkiv
• Oksum, Mads Anders & Randsborg, Per-Henrik (2018). Fiksering av proksimale tibiofibulærledd med dynamisk suturbutton (demonstrasjon av en kirurgisk metode). Fulltekst i vitenarkiv
• Årøen, Asbjørn; Kjennvold, Stian; Brinchmann, Jan E.; Randsborg, Per-Henrik; Reinholt, Finn P. & Engebretsen, Lars (2018). Bone marrow derived mesenchymal stem cells in a human clinical trial to repair articular cartilage defects of the knee. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik (2018). Norwegian Cartilage Project. Presenting protocols. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik & Ananthaharan, Archana (2018). Epidemiology and patient reported outcome after juvenile osteochondritis dissecans in the knee. Fulltekst i vitenarkiv
• Randsborg, Per-Henrik; Jakobsen, Rune Bruhn & Bukholm, Ida Rashida Khan (2018). Compensation after treatment for ACL injuries. Fulltekst i vitenarkiv

Se alle arbeider i NVA