Resident Perceptions of Virtual Reality Versus Dry Lab Simulation for Advanced Shoulder Arthroscopy Resident Training.

INTRODUCTION: Surgical training using simulation can fill gaps in traditional surgical residency learning. We hypothesize that arthroscopy training conducted on a virtual reality simulator will be preferred by orthopaedic surgery residents over a traditional dry lab simulation model. METHODS: 38 orthopaedic surgery residents at a single U.S. residency program were randomized to train for a shoulder arthroscopy procedure using either a virtual reality simulator or a table-top dry lab simulator. Training and learning preferences were then asked of the resident participants. RESULTS: Junior residents were likely to report training preference for the virtual reality simulator compared to senior residents [15/24 (62.5%) v. 8/14 (57.1%); P = .043]. Simulator preference was not influenced by subspecialty interest, prior arthroscopy experience, or simulator experience. Virtual reality simulation was associated with positive attitude towards arthroscopy and high chance of reporting learning gains on general arthroscopic understanding. Senior residents were 4.7 times more likely than juniors to report learning gains via staff discussion pre- and post-operatively. A majority of residents [34/38 (89.5%)] reported, however, wanting more simulation for training surgical skills. CONCLUSION: Simulation is a desired and potentially valuable adjunct to training orthopaedic residents in arthroscopy. Training needs do evolve; and junior arthroscopists may benefit more from virtual reality platforms for general skills. Senior residents preferred dry lab simulation, possibly because it allowed for handling of actual instruments and implants.

How Common Are Civilian Blast Injuries in the National Trauma Databank, and What Are the Most Common Mechanisms and Characteristics of Associated Injuries?

BACKGROUND: Recent military conflicts have produced substantial improvements in the care of service members who experience blast injuries. As conflicts draw down, it is important to preserve and improve skills gained in combat. It is unknown whether civilian blast injuries can serve as a surrogate for military blast trauma. To guide further research, it is crucial to understand the volume, severity, and distribution of civilian blast injury in the civilian population. QUESTIONS/PURPOSES: (1) What proportion of US trauma admissions are a result of blast injury? (2) What are the common mechanisms, and what is the demographic breakdown of civilian patients presenting to trauma centers after blast injuries? (3) What is the severity, and what are the characteristics of injuries sustained by civilian patients after blast injuries? METHODS: We queried the American College of Surgeons National Trauma Databank (NTDB), a national aggregation of trauma registry data which captures robust mechanism of injury and wounding pattern information, for any patient admitted for trauma and an initial mechanism of injury corresponding to a predefined list of ICD-9 and ICD-10 external cause of injury codes related to blast injuries and reported as a proportion of all trauma-related admissions. Mechanisms were categorized into similar groups, and data were collected regarding demographics as well as location and intentionality of blast (that is, unintentional, the result of assault, or self-inflicted). Patient injuries were characterized by ICD-9 or ICD-10 diagnosis codes and sorted according to the body area affected and severity of injury, measured via the Injury Severity Score (ISS). The ISS is a measure of trauma severity, with scores ranging from 1 to 75 points based on injury severity, which is calculated according to injury scores in six separate body domains (head or neck, face, chest, abdomen or pelvis, extremities, external). A score of 1 represents a minor trauma to one region, while a score of 75 indicates injuries deemed nonsurvivable in one or more domains. Data were limited to trauma admissions in 2016. RESULTS: Patients injured by blast mechanisms represented 0.3% (2682 of 968,843) of patients in NTDB-participating trauma centers who were treated after a blast injury in the year 2016; 86% (2315 of 2682) of these patients were men, and the mean ± SD age was 38 ± 21 years. Blast injuries most commonly occurred after detonation of fireworks (29% [773 of 2682]) or explosion of gas or pressurized containers (27% [732 of 2682]). The most commonly injured area of the body was the upper extremity (33% [894 of 2682]), followed by the face (28% [747 of 2682]), lower extremity (11% [285 of 2682]), thorax (10% [280 of 2682]), and head (10% [259 of 2682]). Fifty-eight percent (1564 of 2682) of patients had at least one burn injury. A total of 2% (51 of 2682) of the injuries were fatal, with a mean ISS score of 6 ± 8; 23% (608 of 2682) of patients presented with injuries classified as severe (ISS > 8). CONCLUSION: Civilian blast-associated injuries are not common, but they can be severe, and in many (though not all) respects they seem similar to those described in published case series of military blast victims. Key differences include age and gender (civilian injuries more commonly involve women and older patients than do those in military studies). The potential of civilian blast patient care as a surrogate for study and clinical experience for military surgeons in the interwar period-as recommended by the National Academies of Sciences, Engineering, and Medicine report-is supported by our preliminary results. Future interventions or training programs would likely need to rely on multisite or targeted partnerships to encounter appropriate numbers of patients with blast injuries. LEVEL OF EVIDENCE: Level IV, prognostic study.

Sex differences in neuromuscular control of quadriceps.

PURPOSE: Patellofemoral pain syndrome (PFPS) is twice as prevalent in females as males, yet a few studies have evaluated differences in quadriceps muscle control between sexes or across force levels. This study investigated sex differences in quadriceps EMG onset times and amplitude at different force levels during isometric knee extension in asymptomatic males and females and in females with PFPS. METHODS: Thirteen healthy males, 12 healthy females, and 10 females with PFPS performed isometric knee extension ramp contractions at 25%, 50%, and 75% of maximal voluntary contraction (MVC). Surface EMG was recorded from the vastus lateralis (VL), vastus medialis oblique (VMO), vastus medialis (VM), and rectus femoris (RF). RESULTS: Healthy females showed delayed VL (222 ± 67 ms, p = 0.002), VMO (357 ± 101 ms, p = 0.001), and VM (258 ± 62 ms, p < 0.001) recruitment in comparison with healthy males. Healthy males activated the VL earlier than the VM (156 ± 51 ms, p = 0.02) and RF (379 ± 74 ms, p < 0.001), and at a similar time as the VMO; healthy females activated the VL earlier than the VM (192 ± 53 ms, p = 0.004) and VMO (239 ± 73 ms, p = 0.01). A lower VMO:VL activation ratio was found at 25% MVC (p < 0.001) than at higher force levels. CONCLUSIONS: Delayed activation of the VMO relative to the VL has been proposed as a risk factor for PFPS. This study confirms a delay in VMO onset time in females.

An Impaled Potential Unexploded Device in the Civilian Trauma Setting: A Case Report and Review of the Literature.

BACKGROUND: The management of patients with impaled unexploded devices is rare in the civilian setting. However, as the lines of the traditional battlefield are blurred by modern warfare and terrorist activity, emergency providers should be familiar with facility protocols, plans, and contact information of their local resources for unexploded devices. CASE REPORT: A 44-year-old male sustained a close-proximity blast injury to his lower extremities while manipulating a mortar-type firework. He presented to the regional trauma center with an open, comminuted distal femur fracture and radiographic evidence of a potential explosive device in his thigh. His management was coordinated with the local Explosive Ordinance Disposal and the fire department. WHY SHOULD AN EMERGENCY PHYSICIAN BE AWARE OF THIS?: Explosive devices pose a grave threat when encountered. Familiarization with protocols to manage these patients can mitigate disaster. Emergency providers should expect and be prepared to coordinate care for these patients.

Blood Flow Restriction Training After Knee Arthroscopy: A Randomized Controlled Pilot Study.

INTRODUCTION: Quadriceps strength after arthroscopic knee procedures is frequently diminished several years postoperation. Blood flow restriction (BFR) training uses partial venous occlusion while performing submaximal exercise to induce muscle hypertrophy and strength improvements. The purpose of this study was to evaluate BFR as a postoperative therapeutic intervention after knee arthroscopy. METHODS: A randomized controlled pilot study comparing physical therapy with and without BFR after knee arthroscopy was conducted. Patients underwent 12 sessions of supervised physical therapy. Subjects followed the same postoperative protocol with the addition of 3 additional BFR exercises. Outcome measures included thigh girth, physical function measures, Knee Osteoarthritis Outcome Score (KOOS), Veterans RAND 12-Item Health Survey (VR12), and strength testing. Bilateral duplex ultrasonography was used to evaluate for deep venous thrombosis preintervention and postintervention. RESULTS: Seventeen patients completed the study. Significant increases in thigh girth were observed in the BFR group at 6-cm and 16-cm proximal to the patella (P = 0.0111 and 0.0001). All physical outcome measures significantly improved in the BFR group, and the timed stair ascent improvements were greater than conventional therapy (P = 0.0281). The VR-12 and KOOS subscales significantly improved in the BFR group, and greater improvement was seen in VR-12 mental component score (P = 0.0149). The BFR group displayed approximately 2-fold greater improvements in extension and flexion strength compared with conventional therapy (74.59% vs 33.5%, P = 0.034). No adverse events were observed during the study. CONCLUSIONS: This study suggests that BFR is an effective intervention after knee arthroscopy. Further investigation is warranted to elucidate the benefits of this intervention in populations with greater initial impairment.

Cost Savings and Patient Experiences of a Clinic-Based, Wide-Awake Hand Surgery Program at a Military Medical Center: A Critical Analysis of the First 100 Procedures.

PURPOSE: Wide-awake, local anesthesia, no tourniquet (WALANT) hand surgery was developed to improve access to hand surgery care while optimizing medical resources. Hand surgery in the clinic setting may result in substantial cost savings for the United States Military Health Care System (MHS) and provide a safe alternative to performing similar procedures in the operating room. METHODS: A prospective cohort study was performed on the first 100 consecutive clinic-based WALANT hand surgery procedures performed at a military medical center from January 2014 to September 2015 by a single hand surgeon. Cost savings analysis was performed by using the Medical Expense and Performance Reporting System, the standard cost accounting system for the MHS, to compare procedures performed in the clinic versus the operating room during the study period. A study specific questionnaire was obtained for 66 procedures to evaluate the patient's experience. RESULTS: For carpal tunnel release (n = 34) and A1 pulley release (n = 33), there were 85% and 70% cost savings by having the procedures performed in clinic under WALANT compared with the main operating room, respectively. During the study period, carpal tunnel release, A1 pulley release, and de Quervain release performed in the clinic instead of the operating room amounted to $393,100 in cost savings for the MHS. There were no adverse events during the WALANT procedure. CONCLUSIONS: A clinic-based WALANT hand surgery program at a military medical center results in considerable cost savings for the MHS. TYPE OF STUDY/LEVEL OF EVIDENCE: Economic/Decision Analysis IV.

Reliability of Casting Indices Among Members of an Orthopaedic Surgery Residency.

BACKGROUND: Multiple casting indices have been described to evaluate the adequacy of cast placement in pediatric distal forearm fractures. The aim of this study was to determine the intrarater and interrater reliability of the measurements of 5 common casting indices among members of an orthopaedic surgery residency program. The cast index, 3-point index, gap index, padding index, and Canterbury index were evaluated. METHODS: This was a single-center prospective cohort reliability study that included 12 members of an orthopaedic surgery residency. Participants were placed into 1 of 4 groups by level of training: physician assistants, junior residents, senior residents, and attending orthopaedic surgeons. Twelve radiographs of casted pediatric distal forearm fractures were measured by each participant on 2 separate occasions. Statistical analysis using the intraclass correlation coefficient was used to determine the intrarater and interrater reliability. RESULTS: The cast index was the only casting index to meet our criteria for good intrarater and interrater reliability. CONCLUSION: Continued use of the cast index as a tool to assess pediatric distal forearm cast application is supported by this study. LEVEL OF EVIDENCE: Level 2.

A Process Improvement Evaluation of Sequential Compression Device Compliance and Effects of Provider Intervention.

This process improvement study sought to evaluate the compliance in orthopaedic patients with sequential compression devices and to monitor any improvement in compliance following an educational intervention. All non-intensive care unit orthopaedic primary patients were evaluated at random times and their compliance with sequential compression devices was monitored and recorded. Following a 2-week period of data collection, an educational flyer was displayed in every patient's room and nursing staff held an in-service training event focusing on the importance of sequential compression device use in the surgical patient. Patients were then monitored, again at random, and compliance was recorded. With the addition of a simple flyer and a single in-service on the importance of mechanical compression in the surgical patient, a significant improvement in compliance was documented at the authors' institution from 28% to 59% (p < .0001).

Military Orthopaedic Trauma Registry: Quality Data Now Available.

The Military Orthopaedic Trauma Registry (MOTR) orginally began as part of the Department of Defense Trauma Registry (DoDTR) and became a live registry in 2013. As a quality improvement process, this study examined MOTR data for 20 female amputees compared with DoDTR data. The DoDTR provided diagnosis and procedure codes as a list but no details. The MOTR provided additional data, including specific limb, fracture classifications, and associated injuries per limb. The MOTR allowed for construction of a treatment time line for each limb, including number and timing of debridements, antibiotics, and implant types. Orthopaedic-specific complications were also coded more frequently in the MOTR and clearly identified with a specific injury and treatment. During initial quality control checks, the MOTR provides a greater volume and granularity of detail for orthopaedic-specific injury and treatment information, indicating that the MOTR is on track to provide a valuable repository for data-driven orthopaedic management of combat injury.

Disability After Deployment Injury: Are Women and Men Service Members Different?

BACKGROUND: Civilian trauma literature suggests sexual dimorphism in outcomes after trauma. Because women represent an increasing demographic among veterans, the question remains if war trauma outcomes, like civilian trauma outcomes, differ between genders. QUESTIONS/PURPOSES: (1) Do women service members develop different conditions resulting in long-term disability compared with men service members after injuries sustained during deployment? (2) Do women service members have more or less severe disability after deployment injury compared with men service members? (3) Are men or women more likely to return to duty after combat injury? METHODS: The Department of Defense Trauma Registry was queried for women injured during deployment from 2001 to 2011. The subjects were then queried in the Physical Evaluation Board database to determine each subject's return-to-duty status and what disabling conditions and disability percentages were assigned to those who did not return to duty. Frequency of disabling conditions, disability percentages, and return-to-duty rates for 368 women were compared with a previously published cohort of 450 men service members, 378 of whom had orthopaedic injuries. RESULTS: Women who were unable to return to duty had a higher frequency of arthritic conditions (58% [48 of 83] of women versus 35% [133 of 378] of men, p=0.002; relative risk [RR], 1.64; 95% confidence interval [CI], 1.307-2.067) and lower frequencies of general chronic pain (1% [one of 83] of women versus 19% [59 of 378] of men, p<0.001; RR, 0.08; 95% CI, 0.011-0.549) and neurogenic pain disorders (1% [one of 83] of women versus 7% [27 of 378] of men, p=0.0410; RR, 0.169; 95% CI, 0.023-1.224). Women had more severely rated posttraumatic stress disorder (PTSD) compared with men (38%±23% versus 19%±17%). Forty-eight percent (64 of 133) of battle-injured women were unable to return to active duty, resulting in a lower return-to-duty rate compared with men (34% [450 of 1333]; p=0.003). CONCLUSIONS: After deployment-related injury, women have higher rates of arthritis, lower rates of pain disorders, and more severely rated PTSD compared with men. Women are unable to return to duty more often than men injured in combat. These results suggest some difference between men's and women's outcomes after deployment injury, important information for military and Veterans Administration providers seeking to minimize postdeployment disability. LEVEL OF EVIDENCE: Level III, prognostic study.

Quantification of the exposure of the glenohumeral joint from the minimally invasive to more invasive subscapularis approach to the anterior shoulder: a cadaveric study.

BACKGROUND: There are multiple techniques to approach the glenohumeral joint. Our purpose was to quantify the average area of the glenohumeral joint exposed with 3 subscapularis approaches and determine the least invasive approach for placement of shoulder resurfacing and total shoulder arthroplasty instruments. METHODS: Ten forequarter cadaveric specimens were used. Subscapularis approaches were performed sequentially from split, partial tenotomy, and full tenotomy through the deltopectoral approach. Glenohumeral joint digital photographs were analyzed in Image J software (National Institutes of Health, Bethesda, MD, USA). Shoulder resurfacing and total shoulder arthroplasty instruments were placed on the humeral head, and anatomic landmarks were identified. RESULTS: The average area of humeral head visible, from the least to the most invasive approach, was 3.2, 8.1, and 11.0 cm2, respectively. The average area of humeral head visible differed significantly according to the approach. Humeral head area increased 157% when the subscapularis split approach was compared with the partial tenotomy approach and 35% when the partial approach was compared with the full tenotomy approach. The average area of glenoid exposed from least to most invasive approach was 2.0, 2.3, and 2.5 cm2, respectively. No significant difference was found between the average area of the glenoid and the type of approach. Posterior structures were difficult to visualize for the subscapularis split approach. Partial tenotomy of the subscapularis allowed placement of resurfacing in 70% of the specimens and total arthroplasty instruments in 90%. CONCLUSIONS: The subscapularis splitting approach allows adequate exposure for glenoid-based procedures, and the subscapularis approaches presented expose the glenohumeral joint in a step-wise manner. LEVEL OF EVIDENCE: Anatomy study, cadaver dissection.

Posttraumatic Amputations Epidemiology and Outcomes Within the National Trauma Data Bank: Improved Survival Over Time Results in Increased Population in Need of Rehabilitation Support.

OBJECTIVE: Acute trauma care has significantly reduced mortality over the last two decades. The last study to examine the epidemiology of traumatic amputees predates these gains. The majority of those who sustain traumatic amputation are male; therefore, limited data exist on female amputees. This study aimed to (1) provide a current epidemiological analysis of traumatic amputees and (2) compare male and female amputees. DESIGN: All patients sustaining a major limb amputation in the National Trauma Data Bank from 2013 to 2017 were identified. First, descriptive analyses of patient demographics and injury characteristics were performed and compared with a previous 2000-2004 National Trauma Data Bank study. Second, female and male traumatic amputees were compared in this study. RESULTS: From 2013 to 2017, we identified 7016 patients who underwent major limb amputation. Compared with previous years, the current amputees were older and more severely injured. Mortality was 6.3% in the current years compared with 13.4% in the previous years (odds ratio, 0.44, 95% CI = 0.37-0.51, P < 0.001). After multivariable analysis, mortality remained significantly decreased, with no difference in hospital length of stay. CONCLUSIONS: Contemporary National Trauma Data Bank analysis demonstrated that patients with traumatic amputations, regardless of sex, often survive until hospital discharge, despite more severe injuries.

Posttraumatic osteoarthritis caused by battlefield injuries: the primary source of disability in warriors.

The Army Physical Evaluation Board results for wounded warriors from a previously described cohort were reviewed to identify permanently disabling conditions and whether the conditions were preexisting or caused by battlefield injury. Arthritis was the most common unfitting condition in this cohort, with 94.4% of cases attributed to combat injury and only 5.6% attributed to preexisting conditions or documented in the health records prior to battle injury. The most common causes of injury that resulted in arthritis were intra-articular fractures secondary to explosions, traumatic arthrotomies resulting from fragment projectiles, and gunshot wounds. Arthritis was recognized as a disabling condition an average of 19 ± 10 months after injury. Research is needed to enhance prevention and management of joint injuries in order to minimize the disabling effects of joint degeneration in this young patient population.

Musculoskeletal injuries sustained in modern army combatives.

INTRODUCTION: Participation in martial arts has grown over the past 15 years with an estimated 8 million participants. In 2004, the Chief of Staff of the Army directed that all Initial Military Training soldiers receive Modern Army Combatives (MAC) training. The mechanical differences between the various martial arts styles incorporated into mixed martial arts/MAC pose challenges to the medical professional. We report the incidence of musculoskeletal injuries by Level 1 and 2 trained active duty soldiers participating in MAC over a 3-year period. METHODS: From June 1, 2005 to January 1, 2009, the Orthopaedic Surgery service treated and tracked all injuries in MAC. Data was analyzed using the Chi(2) method of analysis. (p < 0.05). RESULTS: 155 of 1,025 soldiers presenting with MAC injuries reported inability to perform their military occupation specialty duties. The knee was most frequently injured followed by shoulder. Surgical intervention was warranted 24% of the time. CONCLUSION: Participants in MAC reported injuries severe enough to impact occupational duties at 15.5%. Surgical intervention was warranted only 24% of the time. The knee and shoulder are the most frequently injured body parts. Labral repair was the most frequent surgical procedure.

Diversity and Inclusion in Orthopaedic Surgery from Medical School to Practice: AOA Critical Issues.

ABSTRACT: Orthopaedic surgery has historically been one of the least diverse fields in medicine in the U.S. Despite having been declared a critical issue by the American Orthopaedic Association, a lack of diversity and inclusion across all metrics remains a persistent problem. In order to balance representation within orthopaedic surgery, a multiyear and multilevel approach should be considered across the life cycle of a surgeon. Talented individuals from diverse backgrounds must be identified and given early exposure to orthopaedic surgery. They must be nurtured, mentored, and retained. Representation at the medical student, resident, and faculty level is vital to ensuring diversity across the next generation of surgeons.We cannot alter representation within orthopaedics unless we broaden the candidate selection pool. Medical school classes provide the selection pool for residency, residency provides the candidates for fellowship, fellowships provide the candidates for employment, and employment provides the pool for promotion to leadership positions. Through each progression, there is a loss of underrepresented applicants, which leads to a lack of balanced representation in orthopaedic surgery. With stronger efforts to identify and retain individuals at each phase of a surgeon's career, we hope to mitigate the loss of talented and diverse individuals from this field.We challenge the paradigm of increasing diversity that focuses only on the resident selection level. Instead, efforts must begin at the medical student level. Efforts for early and meaningful exposure to the field through a musculoskeletal curriculum and rotations as well as connection through mentorship and sponsorship are vital for retention. At each ascending level of education, reinvestment in each individual is critical. Exposure, mentorship, retention, and promotion should lead to a more diverse and rich future. To achieve this, deliberate and longitudinal action should be instituted to increase diversity within orthopaedics.

Breakout session: Ethnic and gender differences in diabetic foot management and amputations.

BACKGROUND: Although the health status of all Americans has improved substantially in the past century, gender and ethnic disparities still persist. Gender and ethnic disparities in diabetic foot management and amputations are an important but largely ignored issue in musculoskeletal health care. QUESTIONS/PURPOSES: Our purposes were to (1) clarify where we are now, (2) describe ways to get where we need to go, and (3) suggest solutions for how we get there, with respect to gender and ethnic disparities in diabetic foot management and amputations. WHERE ARE WE NOW?: Studies investigating socioeconomic, cultural, racial, and biologic contributing factors on gender and ethnic musculoskeletal healthcare disparities have found no single root cause. Studies into disparities in diabetic foot management and amputation have discordant methodologies and most are retrospective. Effective intervention strategies to eliminate these disparities are nonexistent. WHERE DO WE NEED TO GO?: The orthopaedic leadership should lead the movement to create a clearly defined strategy and assist young investigators to gain access to large datasets to study this problem. Orthopaedic specialty society leaders should help to create valid outcome tools, especially on peripheral vascular disease and amputations. HOW DO WE GET THERE?: The working group proposed a three-pronged strategy of education, research, and advocacy to help address this problem.

Mortality in female war veterans of operations enduring freedom and Iraqi freedom.

BACKGROUND: Combat-wounded service members are surviving battle injuries more than ever. Given different combat roles held by men and women, female service members should survive wounds at an unprecedented rate. QUESTIONS/PURPOSES: We determined whether the casualty rates for females differ from their male counterparts and characterized wounds sustained by female casualties. METHODS: We calculated the percentage of the 5141 deaths among the 40,531 casualties by gender for those serving in Operations Enduring Freedom (OEF) and Iraqi Freedom (OIF) from Defense Manpower Statistics between 2001 and 2009. We searched the Joint Theatre Trauma Registry for female casualties and described their injury characteristics. No matched cohort of male casualties was searched. RESULTS: Female veterans comprised 1.9% of all casualties and 2.4% of all deaths. In OIF, the percent death for women was 14.5% (103 deaths) versus 12.0% (4226 deaths) for men. In OEF, the percent death for women was 35.9% (19 deaths) versus 17.0% (793 deaths) for men. Battle-injured females had a greater proportion of facial and external injuries and more severe extremity injuries compared with those nonbattle-injured. CONCLUSIONS: The casualty death rate appears higher for women than men although the mechanisms of fatal injuries are not known and may not be comparable. Although facial, external, and extremity injuries were common among battle-injured females, no conclusion can be made as to whether male casualties sustain similar wounding patterns. LEVEL OF EVIDENCE: Level II, prognostic study. See Guidelines for Authors for a complete description of levels of evidence.