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OBJECTIVES Assess outcomes of acetabular open-reduction and internal fixation (ORIF) in the elderly; 2) Investigate factors influencing outcome; 3) Compare outcomes following low and high energy mechanisms of injury. DESIGN Retrospective case series. SETTING Level 1 trauma center. PATIENTS Seventy-eight patients over 60 (age:70.1±7.4; 73.1% males). INTERVENTION ORIF for acetabular fractures. MAIN OUTCOME MEASUREMENTS Complications, re-operation rates, and Oxford Hip Score (OHS), joint preservation and development of symptomatic OA. Cases with OA and OHS

With the rapid uptake of entrustable professional activties and entrustment decision-making as an approach in undergraduate and graduate education in medicine and other health professions, there is a risk of confusion in the use of new terminologies. The authors seek to clarify the use of many words related to the concept of entrustment, based on existing literature, with the aim to establish logical consistency in their use. The list of proposed definitions includes independence, autonomy, supervision, unsupervised practice, oversight, general and task-specific trustworthiness, trust, entrust(ment), entrustable professional activity, entrustment decision, entrustability, entrustment-supervision scale, retrospective and prospective entrustment-supervision scales, and entrustment-based discussion. The authors conclude that a shared understanding of the language around entrustment is critical to strengthen bridges among stages of training and practice, such as undergraduate medical education, graduate medical education, and continuing professional development. Shared language and understanding provide the foundation for consistency in interpretation and implementation across the educational continuum.

The REGAIN (Regional versus General Anesthesia for Promoting Independence after Hip Fracture) trial found similar ambulation and survival at 60 days with spinal versus general anesthesia for hip fracture surgery. Trial outcomes evaluating pain, prescription analgesic use, and patient satisfaction have not yet been reported.To compare pain, analgesic use, and satisfaction after hip fracture surgery with spinal versus general anesthesia.Preplanned secondary analysis of a pragmatic randomized trial. (ClinicalTrials.gov: NCT02507505).46 U.S. and Canadian hospitals.Patients aged 50 years or older undergoing hip fracture surgery.Spinal or general anesthesia.Pain on postoperative days 1 through 3; 60-, 180-, and 365-day pain and prescription analgesic use; and satisfaction with care.A total of 1600 patients were enrolled. The average age was 78 years, and 77% were women. A total of 73.5% (1050 of 1428) of patients reported severe pain during the first 24 hours after surgery. Worst pain over the first 24 hours after surgery was greater with spinal anesthesia (rated from 0 [no pain] to 10 [worst pain imaginable]; mean difference, 0.40 [95% CI, 0.12 to 0.68]). Pain did not differ across groups at other time points. Prescription analgesic use at 60 days occurred in 25% (141 of 563) and 18.8% (108 of 574) of patients assigned to spinal and general anesthesia, respectively (relative risk, 1.33 [CI, 1.06 to 1.65]). Satisfaction was similar across groups.Missing outcome data and multiple outcomes assessed.Severe pain is common after hip fracture. Spinal anesthesia was associated with more pain in the first 24 hours after surgery and more prescription analgesic use at 60 days compared with general anesthesia.Patient-Centered Outcomes Research Institute

Background Surgical observation is an integral part of surgical training. Junior residents, who have limited understanding of the procedures being performed, use observation to gain an initial exposure to surgical techniques. This study explores the challenges junior residents face from a cognitive standpoint when they are observing surgery. Methods Four focus groups were conducted with 18 general surgery junior residents. Transcripts from these focus groups were analyzed using a qualitative interpretative approach and the findings were explored through the lenses of discovery learning and cognitive load theory. Results Surgical observation is perceived by residents as a learning activity with rich potential. However, two main challenges were identified: directing their attention to the most pertinent element during observation and making sense of what is happening during procedures. Conclusions This study can inform strategies to help junior residents observe surgeries more efficiently to help make surgical observation a better learning experience.

Background Research suggests that workplace-based assessment (WBA) tools using entrustment anchors provide more reliable assessments than those using traditional anchors. There is a lack of evidence describing how and why entrustment anchors work. Objective The purpose of this study is to better understand the experience of residents and faculty with respect to traditional and entrustment anchors. Methods We used constructivist grounded theory to guide data collection and analysis (March–December 2017) and semistructured interviews to gather reflections on anchors. Phase 1 involved residents and faculty (n = 12) who had only used assessment tools with traditional anchors. Phase 2 involved participants who had used tools with entrustment anchors (n = 10). Data were analyzed iteratively. Results Participants expressed that the pragmatic language of entrustment anchors made WBA (1) concrete and justifiable; (2) transparent as they explicitly link clinical assessment and learning progress; and (3) align with training outcomes, enabling better feedback. Participants with no prior experience using entrustment anchors outlined contextual concerns regarding their use. Participants with experience described how they addressed these concerns. Participants expressed that entrustment anchors leave a gap in assessment information because they do not provide normative data. Conclusions Insights from this analysis contribute to a theoretical framework of benefits and challenges related to the adoption of entrustment anchors. This richer understanding of faculty and resident perspectives of entrustment anchors may assist WBA developers in creating more acceptable tools and inform the necessary faculty development initiatives that must accompany the use of these new WBA tools.

The iconic Miller's pyramid, proposed in 1989, characterizes 4 levels of assessment in medical education ("knows," "knows how," "shows how," "does"). The frame work has created a worldwide awareness of the need to have different assessment approaches for different expected outcomes of education and training. At the time, Miller stressed the innovative use of simulation techniques, geared at the third level ("shows how"); however, the "does" level, assessment in the workplace, remained a largely uncharted area. In the 30 years since Miller's conference address and seminal paper, much attention has been devoted to procedures and instrument development for workplace-based assessment. With the rise of competency-based medical education (CBME), the need for approaches to determine the competence of learners in the clinical workplace has intensified. The proposal to use entrustable professional activities as a framework of assessment and the related entrustment decision making for clinical responsibilities at designated levels of supervision of learners (e.g., direct, indirect, and no supervision) has become a recent critical innovation of CBME at the "does" level. Analysis of the entrustment concept reveals that trust in a learner to work without assistance or supervision encompasses more than the observation of "doing" in practice (the "does" level). It implies the readiness of educators to accept the inherent risks involved in health care tasks and the judgment that the learner has enough experience to act appropriately when facing unexpected challenges. Earning this qualification requires qualities beyond observed proficiency, which led the authors to propose adding the level "trusted" to the apex of Miller's pyramid.

Background Fully immersive virtual reality (VR) uses headsets to situate a surgeon in a virtual operating room to perform open surgical procedures. The aims of this study were to determine (1) if a VR curriculum for training residents to perform anterior approach total hip replacement (AA-THR) was feasible, (2) if VR enabled residents' performance to be measured objectively, and (3) if cognitive and motor skills that were learned with use of VR were transferred to the physical world. Methods The performance of 32 orthopaedic residents (surgical postgraduate years [PGY]-1 through 4) with no prior experience with AA-THR was measured during 5 consecutive VR training and assessment sessions. Outcome measures were related to procedural sequence, efficiency of movement, duration of surgery, and visuospatial precision in acetabular component positioning and femoral neck osteotomy, and were compared with the performance of 4 expert hip surgeons to establish competency-based criteria. Pretraining and post-training assessments on dry bone models were used to assess the transfer of visuospatial skills from VR to the physical world. Results Residents progressively developed surgical skills in VR on a learning curve through repeated practice, plateauing, on average, after 4 sessions (4.1 ± 0.6 hours); they reached expert VR levels for 9 of 10 metrics (except femoral osteotomy angle). Procedural errors were reduced by 79%, assistive prompts were reduced by 70%, and procedural duration was reduced by 28%. Dominant and nondominant hand movements were reduced by 35% and 36%, respectively, and head movement was reduced by 44%. Femoral osteotomy was performed more accurately, and acetabular implant orientation improved in VR assessments. In the physical world assessments, experts were more accurate than residents prior to simulation, but were matched by residents after simulation for all of the metrics except femoral osteotomy angle. The residents who performed best in VR were the most accurate in the physical world, while 2 residents were unable to achieve competence despite sustained practice. Conclusions For novice surgeons learning AA-THR skills, fully immersive VR technology can objectively measure progress in the acquisition of surgical skills as measured by procedural sequence, efficiency of movement, and visuospatial accuracy. Skills learned in this environment are transferred to the physical environment.

Background Workplace based assessment (WBA) is crucial to competency-based education. The majority of healthcare is delivered in the ambulatory setting making the ability to run an entire clinic a crucial core competency for Internal Medicine (IM) trainees. Current WBA tools used in IM do not allow a thorough assessment of this skill. Further, most tools are not aligned with the way clinical assessors conceptualize performances. To address this, many tools aligned with entrustment decisions have recently been published. The Ottawa Clinic Assessment Tool (OCAT) is an entrustment-aligned tool that allows for such an assessment but was developed in the surgical setting and it is not known if it can perform well in an entirely different context. The aim of this study was to implement the OCAT in an IM program and collect psychometric data in this different setting. Using one tool across multiple contexts may reduce the need for tool development and ensure that tools used have proper psychometric data to support them. Methods Psychometrics characteristics were determined. Descriptive statistics and effect sizes were calculated. Scores were compared between levels of training (juniors (PGY1), seniors (PGY2s and PGY3s) & fellows (PGY4s and PGY5s)) using a one-way ANOVA. Safety for independent practice was analyzed with a dichotomous score. Variance components were generated and used to estimate the reliability of the OCAT. Results Three hundred ninety OCATs were completed over 52 weeks by 86 physicians assessing 44 residents. The range of ratings varied from 2 (I had to talk them through) to 5 (I did not need to be there) for most items. Mean scores differed significantly by training level (p

OBJECTIVE To determine if geriatric intertrochanteric hip fracture patients achieve equivalent postoperative functional status after management with either a short (180-200 mm) or a long (260-460 mm) InterTAN intramedullary device. DESIGN Retrospective review of a prospective randomized control trial. SETTING Four Level I Trauma Centers. PATIENTS/PARTICIPANTS One hundred eight patients with OTA/AO classification 31A-1 and 31A-2 intertrochanteric hip fractures were included in the study. INTERVENTION Internal fixation using an IT device. MAIN OUTCOMES MEASURES Primary outcomes included Functional Independence Measure and Timed Up and Go. Secondary outcomes included blood loss, surgical time, length of stay, adverse events, and mortality. RESULTS Seventy-one short and 37 long IT patients met study inclusion criteria. Demographics were similar between groups. There was no difference in Functional Independence Measure or Timed Up and Go scores between the 2 IT groups at any of the time points collected. Mean operative time was lower in the short IT group than in the long IT group (60 vs. 73 minutes; P = 0.021). A higher proportion of long IT patients had reamed constructs (95% vs. 48% short IT, P < 0.001). Postoperative blood loss was significantly higher in the long IT group without a significant influence on the number of patients requiring transfusion (P = 0.582) or average units transfused (P = 0.982). There was no significant difference in the proportion of postoperative adverse events between the 2 cohorts despite a higher number of peri-implant femur fractures in the short IT group than in the long IT group (5 vs. 1, P = 0.350). CONCLUSIONS Postoperative functional status was not influenced by the length of IT device in the management of geriatric intertrochanteric hip fractures. LEVEL OF EVIDENCE Therapeutic Level III. See Instructions for Authors for a complete description of levels of evidence.

Construct: We compared a single-item performance score with the Ottawa Surgical Competency Operating Room Evaluation (O-SCORE) for their ability in assessing surgical competency.Surgical programs are adopting competency-based frameworks. The adoption of these frameworks for assessment requires tools that produce accurate and valid assessments of knowledge and technical performance. An assessment tool that is quick to complete could improve feasibility, reduce delays, and result in a higher volume of assessments of learners. Previous work demonstrated that the 9-item O-SCORE can produce valid results; the goal of this study was to determine if a single-item performance rating (Is candidate competent to independently complete procedure: yes or no) completed at a separate viewing would correlate to the O-SCORE, thus increasing feasibility of procedural competence assessment.Nineteen residents and 2 staff orthopedic surgeons from the University of Ottawa volunteered for a 2-part OSCE-style station including a written questionnaire and videotaped simulated open reduction and internal fixation midshaft radius fracture. Each performance was rated independently by 3 orthopedic surgeons using a single-item performance score (Time 1). The performances were assessed again 6 weeks later by the 3 raters using the O-SCORE (Time 2). Correlation between the single-item performance score and the O-SCORE were evaluated.Three orthopedic surgeons completed 21 ratings each resulting in 63 orthopedic ratings. There was a high level of correlation and agreement between the single-item performance score at Time 1 and Time 2 (κ correlation =0.72-1.00; p .001; percentage agreement =90%-100%). The reliability of the O-SCORE at Time 2 with three raters was 0.83 and the internal consistency was 0.89. There was a tendency for each rater to assign more yes responses to the more senior trainees.A single-item performance score correlated highly with the O-SCORE in an orthopedic setting. A single-item score could be used to supplement a multi-item score with similar results in orthopedics. There is still benefit in completing multi-item scores such as the O-SCORE evaluations to guide specific areas of improvement and direct feedback.

Author(s): Braman, Jonathan P; Bernthal, Nicholas; Freedman, Brett; Gofton, Wade; Hsu, Joseph; Sheps, David; Strauss, Eric

Clinical trials and meta-analyses have suggested that aspirin may be effective for the prevention of venous thromboembolism (proximal deep-vein thrombosis or pulmonary embolism) after total hip or total knee arthroplasty, but comparisons with direct oral anticoagulants are lacking for prophylaxis beyond hospital discharge.We performed a multicenter, double-blind, randomized, controlled trial involving patients who were undergoing total hip or knee arthroplasty. All the patients received once-daily oral rivaroxaban (10 mg) until postoperative day 5 and then were randomly assigned to continue rivaroxaban or switch to aspirin (81 mg daily) for an additional 9 days after total knee arthroplasty or for 30 days after total hip arthroplasty. Patients were followed for 90 days for symptomatic venous thromboembolism (the primary effectiveness outcome) and bleeding complications, including major or clinically relevant nonmajor bleeding (the primary safety outcome).A total of 3424 patients (1804 undergoing total hip arthroplasty and 1620 undergoing total knee arthroplasty) were enrolled in the trial. Venous thromboembolism occurred in 11 of 1707 patients (0.64%) in the aspirin group and in 12 of 1717 patients (0.70%) in the rivaroxaban group (difference, 0.06 percentage points; 95% confidence interval [CI], -0.55 to 0.66; P0.001 for noninferiority and P=0.84 for superiority). Major bleeding complications occurred in 8 patients (0.47%) in the aspirin group and in 5 (0.29%) in the rivaroxaban group (difference, 0.18 percentage points; 95% CI, -0.65 to 0.29; P=0.42). Clinically important bleeding occurred in 22 patients (1.29%) in the aspirin group and in 17 (0.99%) in the rivaroxaban group (difference, 0.30 percentage points; 95% CI, -1.07 to 0.47; P=0.43).Among patients who received 5 days of rivaroxaban prophylaxis after total hip or total knee arthroplasty, extended prophylaxis with aspirin was not significantly different from rivaroxaban in the prevention of symptomatic venous thromboembolism. (Funded by the Canadian Institutes of Health Research; ClinicalTrials.gov number, NCT01720108 .).

CONSTRUCT: The competence of a trainee to perform a surgical procedure was assessed using an electronic tool."Going paperless" in healthcare has received significant attention over the past decades given the numerous potential benefits of converting to electronic health records. Not surprisingly, medical educators have also considered the potential benefits of electronic assessments for their trainees. What literature exists on the transition from paper-based to electronic-based assessments suggests a positive outcome. In contrast, work done examining the transition to and implementation of electronic health records has noted that hospitals who have implemented these systems have not gone paperless despite the benefits of doing so.This study sought to transition a paper-based assessment tool, the Ottawa Surgical Competency Operating Room Evaluation (which has strong evidence for validity) to an electronic version, in three surgical specialties (Orthopedic Surgery, Urology, General Surgery). However, as the project progressed, it became necessary to change the focus of the study to explore the issues of transitioning to a paperless assessment tool as we identified an extremely low participation rate.Over the first 3 months 440 assessment cases were logged. However, only a small portion of these cases were assessed using the electronic tool (Orthopedic Surgery = 16%, Urology = 5%, General Surgery = 0%). Participants identified several barriers in using the electronic assessment tool such as increased time compared to the paper version and technological issues related to the log-in procedure.Essentially, users want the tool to be as convenient as paper. This is consistent with research on electronic health records implementation but different from previous work in medical education. Thus, we believe our study highlights an important finding. Transitioning from a paper-based assessment tool to an electronic one is not necessarily a neutral process. Consideration of potential barriers and finding solutions to these barriers will be necessary in order to realize the many benefits of electronic assessments.

There have been no studies assessing the optimal biomechanical tension of suture button constructs. The purpose of this study was to assess optimal tensioning of suture button fixation and its ability to maintain reduction under loaded conditions using a stress computed tomography (CT) model.Ten cadaveric lower limbs disarticulated at the knee were used. The limbs were placed in a modified ankle load frame that allowed for the application of sustained torsional axial or combined torsional/axial loads. The syndesmosis and the deep deltoid ligaments complex were sectioned and the limbs were randomized to receive a suture button construct tightened at 4, 8, or 12 kg. The specimens were loaded under the 3 loading scenarios with CT scans performed after each and at the conclusion of testing. Multiple measurements of translation and rotation were compared with baseline CT scan taken before sectioning.Significant lateral (maximum 5.26 mm) and posterior translation (maximum 6.42 mm) and external rotation (maximum 11.71 degrees) was noted with the 4 kg repair. Significant translation was also seen with both the 8 and the 12 kg repairs; however, the incidence was less than with the 4 kg repair. Significant overcompression (ML = 1.69 mm, B = 2.69 mm) was noted with the 12 kg repair and also with the 8 kg repair (B = 2.01 mm).Suture button constructs must be appropriately tensioned to maintain reduction and re-approximate the degree of physiological motion at the distal tibiofibular joint. These constructs also demonstrate overcompression of the syndesmosis; however, the clinical effect of this remains to be determined.

Copyright © 2016 Wolters Kluwer Health, Inc. All rights reserved. Objectives: To compare outcomes in elderly patients with intertrochanteric hip fractures treated with either the sliding hip screw (SHS) or InterTAN intramedullary device (IT). Design: Prospective, randomized, multicenter clinical trial. Setting: Five level 1 trauma centers. Patients: Two hundred forty-nine patients 55 years of age or older with AO/OTA 31A1 (43) and OA/OTA 31A2 (206) fractures were prospectively enrolled and followed for 12 months. Intervention: Computer generated randomization to either IT (n = 123) or SHS (n = 126). Main Outcome Measurements: The Functional Independence Measure (FIM) and the Timed Up and Go test (TUG) were used to measure function and motor performance. Secondary outcome measures included femoral shortening, complications, and mortality. Results: Demographics, comorbidities, preinjury FIM scores and TUG scores were similar between groups. Patients (17.2%) who received an IT had limb shortening greater than 2 cm compared with 42.9% who received an SHS (P < 0.001). To determine the importance of preinjury function and fracture stability, we analyzed the subgroup of patients with the ability to walk 150 m independently preinjury and an OA/OTA 31A-2 fracture (n = 70). In this subgroup, patients treated with SHS had greater shortening and demonstrated poorer FIM and TUG scores compared with patients treated with an IT. Conclusions: Overall, most patients with intertrochanteric femur fractures can expect similar functional results whether treated with an intramedullary or extramedullary device. However, active, functional patients have an improved outcome when the InterTAN is used to treat their unstable intertrochanteric fracture. Level of Evidence: Therapeutic Level I. See Instructions for Authors for a complete description of levels of evidence.

Background: Negative-pressure wound therapy (NPWT) can improve fasciotomy wound closure, but its effects on skeletal muscle are largely unknown. The purpose of this study was to evaluate NPWT effects on skeletal muscle after fasciotomy for compartment syndrome in an animal model and to assess regional variability in muscle fiber regeneration. Methods: Compartment syndrome was induced in the hindlimb of twenty-two adult female pigs with use of a continuous intracompartmental serum-infusion model. Fasciotomy was performed after six hours, and animals were randomized to receive either wet-to-dry gauze dressings (control group) or NPWT dressings (−125 mm Hg, continuous suction) for seven days. Delayed primary wound closure was attempted at seven days, and the peroneus tertius was harvested for analysis seven days or twenty-one days after fasciotomy. Muscles were weighed, and hematoxylin and eosin-stained samples from four regions of the muscle (superficial central, deep central, lateral, and proximal) were mapped for different cellular morphologies. Results: Muscle weight was greater in the affected limb at all time points with no difference between treatment groups. At seven days, only the deep central samples in the NPWT group had a significantly greater cross-sectional area containing normal fibers as compared with that found in the controls. By twenty-one days, the deep central, lateral, and proximal regions of the NPWT-treated muscles had a smaller cross-sectional area containing normal fiber morphology and a greater cross-sectional area containing only mononucleated cells as compared with the controls. Conclusions: NPWT did not decrease muscle weight. At twenty-one days, the extent of muscle fiber regeneration after fasciotomy for compartment syndrome was reduced in muscles treated with NPWT for seven days compared with the values in the control group treated with wet-to-dry gauze dressings. Clinical Relevance: NPWT may be harmful to skeletal muscle after compartment syndrome requiring fasciotomy and local wound care.

Background For total hip arthroplasty (THA), cognitive training prior to performing real surgery may be an effective adjunct alongside simulation to shorten the learning curve. This study sought to create a cognitive training tool (CTT) to perform anterior approach (AA)-THA, which was validated by expert surgeons, and test its use as a training tool compared with conventional material. Methods We employed a modified Delphi method with 4 expert surgeons from 3 international centers of excellence. Surgeons were independently observed performing THA before undergoing semistructured cognitive task analysis (CTA) and before completing successive rounds of surveys until a consensus was reached. Thirty-six surgical residents (postgraduate year [PGY]-1 through PGY-4) were randomized to cognitive training or training with a standard operation manual with surgical videos before performing a simulated AA-THA. Results The consensus CTA defined THA in 11 phases, in which were embedded 46 basic steps, 36 decision points, and 42 critical errors and linked strategies. This CTA was mapped onto an open-access web-based CTT. Surgeons who prepared with the CTT performed a simulated THA 35% more quickly (time, mean 28 versus 38 minutes) with 69% fewer errors in instrument selection (mean 29 versus 49 instances), and required 92% fewer prompts (mean 13 versus 25 instances). They were more accurate in acetabular cup orientation (inclination error, mean 8° versus 10°; anteversion error, mean 14° versus 22°). Conclusions This validated CTT for arthroplasty provides structure for competency-based learning. It is more effective at preparing orthopaedic trainees for a complex procedure than conventional materials, as well as for learning sequence, instrumentation utilization, and motor skills. Clinical relevance Cognitive training combines education on decision-making, knowledge, and technical skill. It is an inexpensive technique to teach surgeons to perform hip arthroplasty and is more effective than current preparation methods.

Most assessment of surgical trainees is based on measures of knowledge, with limited evaluation of their competence to actually perform various surgical procedures. In this study, the authors evaluated a tool they designed to assess a trainee's competence to perform an entire surgical procedure independently, regardless of procedure type or postgraduate year (PGY).In phase 1, the Ottawa Surgical Competency Operating Room Evaluation (O-SCORE) was piloted in the University of Ottawa's Division of Orthopaedic Surgery. In phase 2, the refined 11-item tool (8 items rated on a 5-point competency scale, 1 item assessing procedural competence, 2 feedback items) was used in the Divisions of Orthopaedic Surgery and General Surgery to assess residents' performance on 11 common procedures. Quantitative and qualitative analyses were conducted.In phase 2, 34 orthopaedic and general surgeons assessed the performance of 37 residents in 163 procedures. ANOVA demonstrated an effect of PGY. Post hoc analysis found that total procedure scores for PGYs 1 and 2 were lower than those for PGY 3 (P.001), and PGY 3 scores were lower than those for PGYs 4 and 5 (P.02). Analysis of qualitative data indicated that the rating scale was practical and useful for surgeons and residents.This novel evaluation tool successfully discriminated between junior and senior residents and identified surgical competency across various PGY levels regardless of procedure type. Multiple sources of evidence support the O-SCORE as a valid tool for the assessment of trainee operative competency.

CONSTRUCT: The Ottawa Surgical Competency Operating Room Evaluation (O-SCORE) is a 9-item surgical evaluation tool designed to assess technical competence in surgical trainees using behavioral anchors.The initial development of the O-SCORE produced evidence for valid results. Further work is required to determine if the use of a single surgeon or an unblinded rater introduces bias. In addition, the relationship of the O-SCORE to other currently used technical assessment tools should be explored to provide validity evidence related to the relationship to other measures. We have designed this project to provide continued validity evidence for the O-SCORE related to these two issues.Nineteen residents and 2 staff Orthopedic Surgeons from the University of Ottawa volunteered to participate in a 2-part OSCE style station. Participants completed a written questionnaire followed by a videotaped 10-minute simulated open reduction and internal fixation of a midshaft radius fracture. Videos were rated individually by 2 blinded staff orthopedic surgeons using an Objective Structured Assessment of Technical Skills (OSATS) global rating scale, an OSATS checklist, and the O-SCORE in random order.O-SCORE results appeared sensitive to surgical training level even when raters were blinded. In addition, strong agreement between two independent observers using the O-SCORE suggests that the measure captures a performance easily recognized by surgical observers. Ratings on the O-SCORE also were strongly associated with global ratings on the currently most validated technical evaluation tool (OSATS). Collectively, these results suggest that the O-SCORE generates accurate, reproducible, and meaningful results when used in a randomized and blinded fashion, providing continued validity evidence for using this tool to evaluate surgical trainee competence.The O-SCORE was able to differentiate surgical trainee level using blinded raters providing further evidence of validity for the O-SCORE. There was strong agreement between two independent observers using the O-SCORE. Ratings on the O-SCORE also demonstrated equivalence to scores on the most validated technical evaluation tool (OSATS). These results suggest that the O-SCORE demonstrates accurate and reproducible results when used in a randomized and blinded fashion providing continued validity evidence for this tool in the evaluation of surgical competence in the trainees.

Meaningful residency education occurs at the bedside, along with opportunities for situated in-training assessment. A necessary component of workplace-based assessment (WBA) is the clinical supervisor, whose subjective judgments of residents' performance can yield rich and nuanced ratings but may also occasionally reflect bias. How to improve the validity of WBA instruments while simultaneously capturing meaningful subjective judgment is currently not clear. This Perspective outlines how "entrustability scales" may help bridge the gap between the assessment judgments of clinical supervisors and WBA instruments. Entrustment-based assessment evaluates trainees against what they will actually do when independent; thus, "entrustability scales"-defined as behaviorally anchored ordinal scales based on progression to competence-reflect a judgment that has clinical meaning for assessors. Rather than asking raters to assess trainees against abstract scales, entrustability scales provide raters with an assessment measure structured around the way evaluators already make day-to-day clinical entrustment decisions, which results in increased reliability. Entrustability scales help raters make assessments based on narrative descriptors that reflect real-world judgments, drawing attention to a trainee's readiness for independent practice rather than his/her deficiencies. These scales fit into milestone measurement both by allowing an individual resident to strive for independence in entrustable professional activities across the entire training period and by allowing residency directors to identify residents experiencing difficulty. Some WBA tools that have begun to use variations of entrustability scales show potential for allowing raters to produce valid judgments. This type of anchor scale should be brought into wider circulation.

Background: Assessing the adequacy of bone resection when correcting cam-type femoroacetabular impingement can be difficult when the surgeon is inexperienced or when less-invasive arthroscopic surgical techniques are used. The primary purpose of the present study was to compare, using a Sawbones model, the results of computer-assisted navigated osteochondroplasty of the femoral neck junction with correction with use of femoral head spherometer gauges. The second objective was to compare the results of computer-assisted osteochondroplasty performed by surgeons who had varied experience with the procedure. Methods: We calculated and compared the post-resection alpha angle in custom-molded Sawbones models with cam-type impingement following both surgical techniques, performed by three surgeons with varied experience with the procedure. The alpha angle was measured at two positions (the three o’clock and one-thirty positions of the femoral head-neck junction) before and after resection. Results: At the three o’clock position, there were no significant differences between the computer-navigation and spherometer groups (p = 0.83). There was undercorrection at the one-thirty position, with the median alpha angle being greater in the navigation group as compared with the spherometer group (71.0 compared with 58.6; p = 0.05). In the navigation group, there were no significant differences in the post-resection mean alpha angle among the three surgeons at either the one-thirty plane or the three o’clock plane. Conclusions: Navigation enabled the inexperienced surgeon to perform an equivalent amount of bone resection as the more experienced surgeons. However, all surgeons did not sufficiently resect the cam deformity as compared with the gold-standard open technique at the one-thirty position. Clinical Relevance: The limitations of computer-assisted surgery should be understood, and adequate training for surgical correction of cam-type femoroacetabular impingement remains essential.

Background: While computer-assisted orthopaedic surgery technology may facilitate performance and learning in the expert, its effects on the trainee are unclear. Motor learning theory suggests that, while the real-time feedback provided by computer-assisted orthopaedic surgery should improve performance, it may be detrimental to learning. The purpose of this study was to assess the effects of computer-assisted orthopaedic surgery on the learning of surgical skills by trainees. Methods: Forty-five participants were randomized to one of three training groups—conventional training, computer navigation, or knowledge of results—in which they learned technical skills related to total hip replacement. Outcomes were assessed in a pretest session and in ten-minute and six-week retention and transfer tests. Results: All groups demonstrated improved accuracy and precision in the determination of the abduction angle and the version angle of the acetabular cups during training (p < 0.001). The computer navigation group demonstrated significantly better accuracy and precision in early training (p < 0.05) and better precision throughout training (p < 0.05). No significant degradation in performance was observed between the immediate and the delayed testing for any group, suggesting that there was task learning in all groups with no negative effects of the tested training modalities on learning. Conclusions: In this study, the concurrent augmented feedback provided by computer-assisted orthopaedic surgery resulted in improved early performance and equivalent learning. While we did not observe a compromise in learning, further investigation is required to ensure that computer-assisted orthopaedic surgery does not compromise trainee learning in more complex tasks. Clinical Relevance: As the utilization of computer-assisted orthopaedic surgery techniques increases, it is essential that we develop an understanding of its effects on performance and learning in both the primary and continuing education environments.

Acetabular fracture patterns in the elderly, with increased involvement of the anterior column, quadrilateral plate comminution, medialization of the femoral head, and marginal impaction, differ from those noted among a younger cohort. Poor prognostic factors for open reduction and internal fixation (ORIF) are posterior wall comminution, marginal impaction of the acetabulum, a femoral head impaction fracture, a so-called gull sign, and hip dislocation. The rate of conversion to total hip arthroplasty following formal ORIF has been reported to be 22% at a mean of twenty-nine months. Total hip replacement after an acetabular fracture generally yields good clinical results; however, in the acute setting, it must be combined with proper stable fracture fixation.

The number of revision total knee replacements continues to increase annually. To date, much of the literature has focused on the performance of titanium revision systems. The primary aim of the current study was to review the mid term results of a contemporary revision knee system, with alternative design features. Ninety-one consecutive patients having aseptic revision total knee arthroplasty with one, modular all-cobalt chrome stemmed revision knee system using hybrid stem fixation were studied prospectively. Eighty-nine revisions in 84 patients were reviewed at a mean of 5.9 years (range, 4.1-8.6 years). Significant improvements in pain scores (15 ± 14 to 38 ± 14), function (40 ± 24 to 53 ± 29), range of motion (88° ± 23° to 98° ± 18°), and total Knee Society score (85 ± 40 to 132 ± 40) were seen at followup. Five patients had revision surgery, with a Kaplan-Meier survivorship of 93.5% at 8.6 years. Intermediate results support the use of cobalt chrome components and hybrid cement fixation; however, this fixation in combination with high articular constraint requires continued monitoring.

The management of intra-articular distal humeral fractures remains a difficult surgical problem. Although an olecranon osteotomy provides excellent exposure for management of these fractures, a number of complications can occur after the creation and repair of the osteotomy including nonunion, malunion, hardware failure, and pain secondary to prominent hardware. In an effort to reduce the incidence of these complications, the senior authors now use contoured 3.5 mm reconstruction plates for the fixation of their apex-distal chevron olecranon osteotomies. Two surgeons at a single institution used this technique of exposure on a series of 17 consecutive patients with intra-articular distal humerus fractures between 1996 and 1999. In this series, all osteotomies united. There was one complication related specifically to the osteotomy: one of the screws in the plate penetrated the proximal radioulnar joint, interfering with forearm rotation; a second procedure was required to shorten the screw. Only one of the 17 patients requested plate removal during the 32 month (average) follow-up period. Plate fixation of olecranon osteotomies using a 3.5 mm reconstruction plate provides a construct with predictable healing and few complications. The overall results using this technique are comparable with other reported methods in the literature.

Today's surgeon is required to demonstrate a variety of professional competencies in an increasingly complex environment. Recently, the time available to train this surgeon has started to erode due to external pressures on administrators and faculty. This growing crisis has led to questions about how to optimize learning in the surgical environment. Clearly, to adequately train a competent surgeon in all the required aspects, multiple environments will be required. We must, therefore, look carefully at each environment to maximize its educational potential for each of the competencies. At the same time, however, we must ensure these educational environments and opportunities integrate into a coherent and systematic program of training that is flexible and adaptable to the individual needs of the trainees. This paper describes two broad areas that must be at the forefront of the community's thinking as we strive toward this goal: the irreplaceable value of a mentor and maximizing the potential of optimal challenge points in learning.

In addition to the intentional teaching of knowledge and skills by surgeons to their trainees and proteges is the unintended, often unrealized transmission of implicit beliefs, attitudes, and behaviors through a process called the hidden curriculum. The hidden curriculum is a function of implicit values held by the institution as a whole, and the individual surgical educators and allied health professionals working in the trainee's learning environment. It has been argued the hidden curriculum plays a central role in the development of professionalism, but it may also play an important role in inadvertently deterring good candidates from considering orthopaedic surgery as a career. We review the importance of attending to the messages we transmit to our trainees, proteges, and junior colleagues as we strive to develop professional competency and recruit the best into the field.

BACKGROUND The role of aspirin in thromboprophylaxis after total hip arthroplasty (THA) is controversial. OBJECTIVE To compare extended prophylaxis with aspirin and dalteparin for prevention of symptomatic venous thromboembolism (VTE) after THA. DESIGN Multicenter randomized, controlled trial with a noninferiority design based on a minimal clinically important difference of 2.0%. Randomization was electronically generated; patients were assigned to a treatment group through a Web-based program. Patients, physicians, study coordinators, health care team members, outcome adjudicators, and data analysts were blinded to interventions. (Current Controlled Trials: ISRCTN11902170). SETTING 12 tertiary care orthopedic referral centers in Canada. PATIENTS 778 patients who had elective unilateral THA between 2007 and 2010. INTERVENTION After an initial 10 days of dalteparin prophylaxis after elective THA, patients were randomly assigned to 28 days of dalteparin (n = 400) or aspirin (n = 386). MEASUREMENTS Symptomatic VTE confirmed by objective testing (primary efficacy outcome) and bleeding. RESULTS Five of 398 patients (1.3%) randomly assigned to dalteparin and 1 of 380 (0.3%) randomly assigned to aspirin had VTE (absolute difference, 1.0 percentage point [95% CI, -0.5 to 2.5 percentage points]). Aspirin was noninferior (P < 0.001) but not superior (P = 0.22) to dalteparin. Clinically significant bleeding occurred in 5 patients (1.3%) receiving dalteparin and 2 (0.5%) receiving aspirin. The absolute between-group difference in a composite of all VTE and clinically significant bleeding events was 1.7 percentage points (CI, -0.3 to 3.8 percentage points; P = 0.091) in favor of aspirin. LIMITATION The study was halted prematurely because of difficulty with patient recruitment. CONCLUSION Extended prophylaxis for 28 days with aspirin was noninferior to and as safe as dalteparin for the prevention of VTE after THA in patients who initially received dalteparin for 10 days. Given its low cost and greater convenience, aspirin may be considered a reasonable alternative for extended thromboprophylaxis after THA. PRIMARY FUNDING SOURCE Canadian Institutes of Health Research.

Background: The visual overlay technique for surgical planning is difficult to apply to spatially complex fractures. Virtual reality can be applied by virtual fracture carving to adapt the visual overlay technique to three-dimensional (3D) images. In this study, we evaluated whether virtual fracture carving is a useful exercise by performing two experiments comparing trainees’ understanding of a complex fracture with the application of either current preoperative techniques or the use of the Virtual-Fracture-Carving Simulator. Methods: Forty-eight participants—senior medical students and residents in postgraduate year 1 (PGY1)—were asked to learn the anatomy of an associated both-column acetabular fracture. The participants were randomized into three groups: control, Sawbones, and virtual (Virtual-Fracture-Carving Simulator). The randomization protocol was stratified for sex and visuospatial ability. The measure of learning was a fracture line-drawing task evaluated for nineteen anatomic relationships. Results: The virtual group performed better than both the control and the Sawbones group, with an absolute difference in score of 22.7% (p = 0.0001) and 17.8% (p = 0.0026), respectively. There was no significant difference between the control and Sawbones groups. The virtual group drew fracture characteristics requiring a higher level of spatial understanding with greater accuracy. Conclusions: The results of this study validate the concept behind the visual overlay planning technique—i.e., that thoughtful play promotes understanding of fracture anatomy. These results objectively demonstrate that the use of a Virtual-Fracture-Carving Simulator is feasible, and superior to conventional preoperative planning strategies in terms of quantity and quality of understanding of a spatially complex fracture.