Variable flip angle T1 mapping and multi-echo T2 and T2* mapping magnetic resonance imaging sequences allow quantitative assessment of canine lumbar disc degeneration.

Magnetic resonance imaging is the gold standard for diagnosing intervertebral disc (IVD) degeneration in dogs. However, published methods for quantifying severity or progression of IVD degeneration are currently limited. Mapping MRI sequences are used in humans for quantifying IVD degeneration but have rarely been applied in dogs. The objective of this prospective, method comparison study was to evaluate variable flip angle T1 mapping and multiecho T2 and T2* mapping as methods for quantifying canine lumbar IVD degeneration in twenty canine patients without clinical signs of spinal disease. Ventral and dorsal lumbar IVD widths were measured on radiographs, and lumbar IVDs were assigned a qualitative Pfirrmann grade based on standard T2-weighted sequences. T1, T2, and T2* relaxation times of the nucleus pulposus (NP) were measured on corresponding maps using manual-drawn ROIs. Strong intra- and interrater agreements were found (P < 0.01) for NP relaxation times. Radiographic IVD widths and T1, T2, and T2* mapping NP relaxation times were negatively correlated with Pfirrmann grading (P < 0.01). Significant differences in T1 NP relaxation times were found between Pfirrmann grade I and the other grades (P < 0.01). Significant differences in T2 and T2* NP relaxation times were found between grade I and the other grades and between grades II and III (P < 0.01). Findings indicated that T1, T2, and T2* MRI mapping sequences are feasible in dogs. Measured NP relaxation times were repeatable and decreased when Pfirrmann grades increased. These methods may be useful for quantifying the effects of regenerative treatment interventions in future longitudinal studies.

Comparison of MRI T1, T2, and T2* mapping with histology for assessment of intervertebral disc degeneration in an ovine model.

An easy, reliable, and time-efficient standardized approach for assessing lumbar intervertebral disc (IVD) degeneration with relaxation times measurements in pre-clinical and clinical studies is lacking. This prospective study aims to determine the most appropriate method for lumbar IVD degeneration (IDD) assessment in sheep by comparing three quantitative MRI sequences (variable-flip-angle T1 mapping, and multi-echo T2 and T2* mapping), correlating them with Pfirrmann grading and histology. Strong intra- and interrater agreements were found for Nucleus pulposus (NP) regions-of-interest (ROI). T1, T2, and T2* mapping correlated with Pfirrmann grading and histological scoring (p < 0.05) except for the most ventral rectangular ROI on T2 maps. Correlations were excellent for all of the T1 ROIs and the T2* NP ROIs. Highly significant differences in T1 values were found between all Pfirrmann grades except between grades I/II and between grades III/IV. Significant differences were identified in the T2 and the T2* values between all grades except between grades I/III. T1, T2, and T2* relaxation times measurements of the NP are an accurate and time-efficient tool to assess lumbar IDD in sheep. Variable-flip-angle T1 mapping may be further considered as a valuable method to investigate IDD and to assess the efficacy of regenerative treatments in longitudinal studies.

Teaching simulated arthroscopic Bankart repair: residents' assessment at the Annual Shoulder Course

Background: This study's aim was to evaluate the performance of senior orthopedic residents during simulated arthroscopic anterior stabilization (Bankart repair) before and after a national shoulder review course. Methods: Participants were assessed before and after the Annual Shoulder Review Course over a 3-day period, using a multiple-choice examination and surgery performance assessment. The surgical evaluation was completed by fellowship-trained surgeons using a standardized procedure checklist and a global rating scale. All Canadian senior orthopedic residents were invited to participate in the course. Results: The 57 participants showed improvement following the course. The written knowledge evaluation mean score increased, and all 3 surgical performance measurements improved: surgical task time improved from 4:40 min to 2:53 min (p < 0.001), surgical technique evaluation increased from 56% to 67% after the procedure checklist (p < 0.001), and anchor placement improved for all 3 aspects. Anchor entry point was the sole measure not to improve enough to reach statistical significance (p = 0.37). Conclusion: Our data support the inclusion of dry model surgical simulation as part of a surgical skills course for both training and assessment of orthopedic surgery residents.

Contexte: Le but de cette étude était d'évaluer le rendement des résidents seniors en orthopédie durant une simulation de stabilisation arthroscopique antérieure (intervention de Bankart) avant et après un cours de révision national sur l'articulation de l'épaule. Méthodes: Les participants ont été évalués avant et après l'Annual Shoulder Review Course sur une période de 3 jours, à l'aide d'un examen à choix multiples et d'une épreuve chirurgicale pratique. L'évaluation chirurgicale était effectuée par des chirurgiens spécialisés, à l'aide d'une liste de vérification normalisée des procédures et d'une échelle d'évaluation globale. Tous les résidents séniors canadiens en orthopédie étaient invités à participer au cours. Résultats: Les 57 participants ont montré une amélioration après le cours. Lesrésultats à l'examen écrit ont augmenté, tout comme ceux des 3 évaluations chirurgicales : le temps chirurgical a diminué, passant de 4:40 min à 2:53 min (p < 0,001), l'évaluation de la technique chirurgicale a augmenté de 56 % à 67 % selon la liste de vérification (p < 0,001) et le positionnement des ancres s'est aussi amélioré pour les 3 positionnements. Le point d'entrée des ancres a été la seule mesure à ne pas s'améliorer suffisamment pour atteindre une portée statistique (p = 0,37). Conclusion: Nos données appuient l'inclusion d'un modèle de simulation sec pour la formation et l'évaluation des résidents en chirurgie orthopédique.

Development and Acceptability Assessment of a Self-Management Intervention to Prevent Acute to Chronic Pain Transition after Major Lower Extremity Trauma.

PURPOSE: Transition from acute to chronic pain often occurs after major lower extremity trauma. Chronic pain has been found to negatively affect daily functioning, including the capacity to work and quality of life. Empirical data and an acceptability assessment were used to develop a self-management intervention aimed at preventing acute to chronic pain transition after major lower extremity trauma (i.e., iPACT-E-Trauma). METHODS: Evidence from previous studies on preventive self-management interventions, combined with a biopsychosocial conceptual framework and clinical knowledge, helped define the key features of the preliminary version. Then a mixed-methods design was used to assess the acceptability of iPACT-E-Trauma by clinicians and patients. RESULTS: The key features of the preliminary version of iPACT-E-Trauma were assessed as acceptable to very acceptable by clinicians and patients. After clinician assessment, intervention activities were simplified and session duration was reduced. Patient acceptability assessment of iPACT-E-Trauma led to the tailoring of key intervention features, based on determinants such as pain intensity and the implementation of self-management behaviors between intervention sessions. Web-based sessions were also developed to facilitate iPACT-E-Trauma delivery. CONCLUSION: This study outlines the process involved in the development of an intervention to prevent chronic pain in patients with lower extremity trauma. Relevant information is provided to nurses and interdisciplinary teams on a self-management intervention to prevent the transition from acute to chronic pain in the trauma population.

Effects of concomitant mild traumatic brain injury on resuming work after suffering from an isolated limb fracture: A cohort study.

BACKGROUND: The objective is to explore the effects of concomitant mild traumatic brain injury (mTBI) on return to work (RTW), among patients suffering from an isolated limb fracture. This follow-up study included a total of 170 working age subjects with an isolated limb fracture, and was conducted in a phone interview approximately 1-year post trauma. 41 had experienced an mTBI and 129 did not. METHODS: Data were obtained through a phone interview conducted on average 20.7 months (SD = 9.6 months) post-accident. The main outcome measure was the number of days taken to RTW after the injury. Demographic information was also gathered during the phone interview. Workers' compensation status was obtained through the hospitals' orthopaedic clinic data. RESULTS: The mTBI group took on average 329.7 days (SD = 298.0) to RTW after the injury, as opposed to 150.3 days (SD = 171.3) for the control group (p < 0.001). After excluding patients who received workers' compensation, the mTBI group still missed significantly more days of work (M = 299.4 days; SD = 333.0) than the control group (M = 105.2 days; SD = 121.6) (p < 0.0001). CONCLUSION: This study shows that mTBI increases work disability by preventing working-age individuals from rapidly returning to work.

Primary care management for isolated limb injury: referral to orthopedic surgery in a trauma center.

INTRODUCTION: Musculoskeletal injuries affect up to 13% of adults annually. Despite this high incidence, quality of primary care, including analgesia, may be sub-optimal. The goal of this study is to describe the quality of primary care for ambulatory patients with isolated limb injury and to identify related factors. METHODS: A cross sectional study was undertaken prospectively on 166 consecutive ambulatory adult patients with isolated limb injury who presented to orthopedics service in a Level one Trauma Centre. Quality of care was assessed by evaluating analgesia, walking aids, immobilization, and quality of referral diagnosis according to actual expert recommendations. RESULTS: This study revealed low quality of primary care for 82 (53.2%) of injured patients. Seventy-three patients (50.3%) had pain level over 5/10 and 45 cases (28.5%) had insufficient/absent analgesia prescriptions. Fifty-one (32.3%) had unacceptable immobilization and 21/59 (35.6%) patients with a lower limb injury did not receive a walking aid prescription. A total of 61 patients (36.7%) had an absent or inadequate referral diagnosis. Factors associated with lower quality depended on the specific quality indicator and included: living further away from the hospital, younger age, initially consulting at another health care center, having a fracture, and being a smoker. CONCLUSION: The high frequency of low quality of care underlines the necessity for orthopedic surgeons to be involved in primary care education. Identifying factors associated with lower quality of care will orient efforts to improve medical care of patients with isolated traumatic injury.

Translation of the Patient Scar Assessment Scale (PSAS) to French with cross-cultural adaptation, reliability evaluation and validation.

BACKGROUND: Patient esthetic satisfaction related to scarring after orthopedic surgery was rarely assessed before the development of the Patient Scar Assessment Scale (PSAS). The purpose of our study was to translate and validate the PSAS and assess the psychometric properties of the French version. METHODS: We conducted a staged validation with forward and backward translation and concurrent validation. The validation committee comrpised bilingual experts. The patient validation sample comprised 53 orthopedic surgery patients who were assessed at a minimum of 1 year postoperatively. We followed a standardized process for cross-cultural adaptation to develop and assess the French version. First, 2 independent translators completed the forward translation of the PSAS and then met to achieve a consensus version. This consolidated version was then backward translated into English and cross-verified with the original version. A group of orthopedic and plastic surgeons assessed this version for content validity. We assessed the test-retest reliability of the new French scale, which was filled out twice by a cohort of 53 patients, using scale distribution analysis, internal consistency (Chronbach alpha) and absolute agreement (intraclass correlation coefficients [ICC (2,1)]). RESULTS: The level of agreement on the translation process between the translators initially and then later among the expert panel was high. The reliability of the translated version (PSAS-Fr) and its internal consistency was high (Chronback alpha 0.87-0.98 for each of the 6 questions), and the test-retest reliability was excellent (ICC 0.96). On the other hand, there was no bias between occasions (retests difference -0.24) and the scores fell within 2 standard deviations of 5. Older patients had higher satisfaction about scar appearance. CONCLUSION: The PSAS-Fr was successfully translated from the original English version and demonstrated strong cross-sectional psychometric properties. Further assessment in longitudinal studies is warranted.