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.

Post-Traumatic 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 (NTDB) from 2013 to 2017 were identified. First, descriptive analyses of patient demographics and injury characteristics were performed and compared with a prior 2000-2004 NTDB study. Second, female and male traumatic amputees were compared in this study. RESULTS: From 2013 to 2017 we identified 7,016 patients who underwent major limb amputation. Compared to prior years, the current amputees were older and more severely injured. Mortality was 6.3% in the current years compared to 13.4% in the prior years (odds ratio [OR] 0.44, 95% CI = 0.37 to 0.51, p < 0.001). After multivariable analysis, mortality remained significantly decreased, with no difference in hospital length of stay. CONCLUSIONS: Contemporary NTDB analysis demonstrated that patients with traumatic amputations, regardless of sex, often survive until hospital discharge, despite more severe injuries.

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.

Shoulder Arthroscopy Simulator Training Improves Surgical Procedure Performance: A Controlled Laboratory Study.

BACKGROUND: Previous simulation studies evaluated either dry lab (DL) or virtual reality (VR) simulation, correlating simulator training with the performance of arthroscopic tasks. However, these studies did not compare simulation training with specific surgical procedures. PURPOSE/HYPOTHESIS: To determine the effectiveness of a shoulder arthroscopy simulator program in improving performance during arthroscopic anterior labral repair. It was hypothesized that both DL and VR simulation methods would improve procedure performance; however, VR simulation would be more effective based on the validated Arthroscopic Surgery Skill Evaluation Tool (ASSET) Global Rating Scale. STUDY DESIGN: Controlled laboratory study. METHODS: Enrolled in the study were 38 orthopaedic residents at a single institution, postgraduate years (PGYs) 1 to 5. Each resident completed a pretest shoulder stabilization procedure on a cadaveric model and was then randomized into 1 of 2 groups: VR or DL simulation. Participants then underwent a 4-week arthroscopy simulation program and completed a posttest. Sports medicine-trained orthopaedic surgeons graded the participants on completeness of the surgical repair at the time of the procedure, and a single, blinded orthopaedic surgeon, using the ASSET Global Rating Scale, graded participants' arthroscopy skills. The procedure step and ASSET grades were compared between simulator groups and between PGYs using paired t tests. RESULTS: There was no significant difference between the groups in pretest performance in either the procedural steps or ASSET scores. Overall procedural step scores improved after combining both types of simulator training (P = .0424) but not in the individual simulation groups. The ASSET scores improved across both DL (P = .0045) and VR (P = .0003), with no significant difference between the groups. CONCLUSION: A 4-week simulation program can improve arthroscopic skills and performance during a specific surgical procedure. This study provides additional evidence regarding the benefits of simulator training in orthopaedic surgery for both novice and experienced arthroscopic surgeons. There was no statistically significant difference between the VR and DL models, which disproved the authors' hypothesis that the VR simulator would be the more effective simulation tool. CLINICAL RELEVANCE: There may be a role for simulator training in the teaching of arthroscopic skills and learning of specific surgical procedures.

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.

Sexual Dimorphisms in Anterior Cruciate Ligament Injury: A Current Concepts Review.

BACKGROUND: Although most anterior cruciate ligament (ACL) injuries occur in male athletes, female athletes are consistently observed to be at a higher risk for sports-specific ACL injury. PURPOSE: To provide a thorough review of what is known about the sexual dimorphisms in ACL injury to guide treatment and prevention strategies and future research. STUDY DESIGN: Narrative review. METHODS: We conducted a comprehensive literature search for ACL-related studies published between January 1982 and September 2017 to identify pertinent studies regarding ACL injury epidemiology, prevention strategies, treatment outcomes, and dimorphisms. By performing a broad ACL injury search, we initially identified 11,453 articles. After applying additional qualifiers, we retained articles if they were published in English after 1980 and focused on sex-specific differences in any of 8 different topics: sex-specific reporting, difference in sports, selective training, hormonal effects, genetics, neuromuscular and kinematic control, anatomic differences, and outcomes. RESULTS: A total of 122 articles met the inclusion criteria. In sum, the literature review indicated that female athletes are at significantly higher risk for ACL injuries than are their male counterparts, but the exact reasons for this were not clear. Initial studies focused on intrinsic differences between the sexes, whereas recent studies have shifted to focus on extrinsic factors to explain the increased risk. It is likely both intrinsic and extrinsic factors contribute to this increased risk, but further study is needed. In addition to female patients having an increased risk for ACL injuries, they are less likely than are male patients to undergo reconstructive surgery, and they experience worse postsurgical outcomes. Despite this, reconstructive surgery remains the gold standard when knee stability, return to sports, and high functional outcome scores are the goal, but further research is needed to determine why there is disparity in surgical rates and what surgical techniques optimize postsurgical outcomes for female patients. CONCLUSION: Male athletes often predominated the research concerning ACL injury and treatment, and although sex-specific reporting is progressing, it has historically been deficient. ACL injuries, prevention techniques, and ACL reconstruction require further research to maximize the health potential of at-risk female athletes.

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.

Pelvic Fracture Care.

While combat-related pelvis fractures are more commonly open, higher energy, and complex in pattern than those seen in the civilian setting, the principles of management are similar. The primary differences are related to the austere setting in which the initial management takes place, and the lack of resources typically available. Initial management consists of cessation of hemorrhage, along with the multi-disciplinary prioritized management of associated injuries, and skeletal stabilization. This is most commonly achieved with a compressive sheet or pelvic binder, with pelvic external fixation when resources allow, and debridement of open wounds as necessary. Definitive, internal fixation is delayed until the patient arrives at a higher echelon of care.

Acute Extremity Compartment Syndrome and the Role of Fasciotomy in Extremity War Wounds.

Acute compartment syndrome (CS) is a frequent and potentially devastating complication of blunt and penetrating extremity injuries. Extremity war injuries are particularly susceptible to CS due to associated vascular injuries; high Injury Severity Score; extensive bone and soft tissue injury; and frequent transportation that may limit close monitoring of the injured extremity. Treatment consists of prompt fasciotomy of all compartments in the involved segment, over their full length. Delayed or incomplete fasciotomy is associated with worse outcomes, including muscle necrosis, infection, and amputation. Enhanced pre-deployment training of surgeons decreases the need for revision fasciotomy at higher echelons of care and should be continued in future conflicts. We recommend the liberal use of prophylactic fasciotomy prior to aeromedical evacuation and after limb reperfusion. For leg fasciotomy, we recommend a two-incision approach as it is more reproducible and allows easy vascular exposure when necessary.

Hydration Strategies for the Female Tactical Athlete.

With unprecedented expansion of the roles of women in the military and the longest period of continuous active combat in US history, it is time that research expanded, including the nutritional and hydration requirements of the female tactical athlete. Dehydration has a negative effect on athletic performance, most significantly in high intensity, aerobic endurance activities. There is evidence female athletes may be more prone to the potentially lethal effects of over hydration. The purpose of this article is to provide a review of the literature to ascertain optimal hydration strategies for the female tactical athlete.

Sex-based Differences in Common Sports Injuries.

The patient's sex plays an important role in mediating the risk for, and experience of, disease. Injuries of the musculoskeletal system are no exception to this phenomenon. Increasing evidence shows that the incidence, clinical presentation, and treatment outcomes for male and female patients with common sports injuries may vary widely. Stress fracture, which is associated with the female athlete triad, is a sports injury with known sex-based differences. Other common sports-related injuries may also have distinct sex-based differences. Understanding these differences is important to optimize each patient's musculoskeletal care.

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.

Sexual Dimorphic Features Associated with Femoroacetabular Impingement.

Sexual dimorphism describes differences in biologic response between males and females due to inherent chromosomal differences. These differences similarly affect orthopaedic-related injuries and treatment outcomes as seen with femoroacetabular impingement, an abnormal hip morphology where females have shown worse hip function scores than male counterparts before and after surgery. Potential dimorphic factors that increase susceptibility of females to injury and/or worse outcomes may include joint laxity, hip morphology, and osseous biology. This article reviews the relevant literature of prevalence, presentation, management, and outcomes that characterize sexual dimorphism as it relates to femoroacetabular impingement.

A randomized controlled trial evaluating methylsulfonylmethane versus placebo to prevent knee pain in military initial entry trainees.

BACKGROUND: Methylsulfonylmethane (MSM) is a naturally occurring sulfur containing substance that has been shown to have anti-inflammatory and antioxidative properties. Previous studies using MSM as an oral supplement to improve pain in those patients with knee osteoarthritis have shown superiority compared to placebo. However, these studies are not translatable to active individuals performing high impact activities and have not evaluated MSM as a preventative measure. METHODS: A total of 180 subjects ranging in age from 18 to 40 years were enrolled. Subjects were randomized into 2 groups receiving either 3 grams OptiMSM methylsulfonylmethane (Bergstrom Nutrition, Vancouver, WA) or a placebo for 8 weeks. Outcomes measured were the Knee Osteoarthritis Outcome Score (KOOS) and the Profile of Moods States (POMS). RESULTS: Three grams of MSM administered daily did not provide significant improvements in the 5 KOOS subscales or the 6 POMS subscales at 30 days or 60 days. CONSLUSION: Although 3 grams of MSM daily can be used safely, there does not appear to be a significant improvement in KOOS or POMS.

Characteristics of US combat veterans (2001-2011) who remain on active duty after upper extremity amputations.

OBJECTIVES: Return to duty following traumatic amputations has been extensively studied in those with lower extremity amputation. As upper extremity amputations occur less frequently, the issue of return to duty for those with upper extremity amputations has received relatively little research. The purpose of this study was to determine the rate at which service members remain on active duty at least one year after having sustained traumatic upper extremity amputations during Operation Iraqi Freedom, Operation Enduring Freedom, and other overseas contingency operations of the Global War on Terrorism. DESIGN: Retrospective. SETTING: Military, Academic Level 1 trauma center. PATIENTS: One hundred eighteen patients who sustained combat-related upper extremity amputations between October 2001 and December 2011. INTERVENTION: Data was obtained from the medical record for these 118 patients. MAIN OUTCOME MEASUREMENTS: Percentage of service member remaining on active duty one year following an upper extremity amputation, and evaluation of demographic and injury related factors associated with retention. RESULTS: The overall rate for the upper extremity amputees studied at one year from injury who remained on active duty was 47%. Officers were more likely to remain on active duty than their enlisted counterparts (P=.021) and patients who sustained burns were also more likely to remain on active duty than patients with similar amputation types without concomitant burn injuries (P=.039). CONCLUSIONS: The rate of service members with traumatic upper extremity amputations who were still on active duty status 1-year postinjury was 47%. The presence of burns and rank were significant factors when examining retention on active duty. Further study on war casualties who sustain upper-extremity traumatic amputations with and without burns is required to optimize outcomes in this population.