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PURPOSE OF REVIEW: Though most of the attention in recent literature on baseball injuries has been paid to throwers, one often overlooked aspect of the game is the effect of the batter’s swing on the shoulder. It is well known that the batter’s lead shoulder can experience significant translational forces during the player’s swing, and that these are increased following a missed swing. The purpose of this paper is to review the background and pathophysiology as well as clinical presentation and treatment of players with Batter’s shoulder. RECENT FINDINGS: Recent studies demonstrate that while nonoperative treatment of Batter’s shoulder is still a viable first line of treatment, favorable outcomes have been reported with arthroscopic posterior labral repair for high level athletes. SUMMARY: Batter’s injury can cause significant pain and dysfunction in baseball hitters, especially during the follow through phase of swing. While conservative care can be attempted early, outcomes following arthroscopic posterior labral repair are favorable with a high rate of return to play.

Background: A common concern associated with elbow ulnar collateral ligament (UCL) reconstruction is the amount of time required for recovery and rehabilitation. For example, for Major League Baseball pitchers, the average time to return to competition ranges from 13.8 to 20.5 months. Suture tape augmentation has shown the ability to provide additional soft tissue stability across other joints in the body. By providing an additional checkrein to the UCL reconstruction while the graft is healing, it may be possible to accelerate the rehabilitation process in overhead athletes and thus effect a quicker return to sports. Purpose: To compare elbow valgus stability and load to failure between UCL reconstruction with and without suture tape augmentation. Study Design: Controlled laboratory study. Methods: Fresh-frozen cadaveric elbows (N = 24) were dissected to expose the UCL. Medial elbow stability was tested with the UCL intact, deficient, and reconstructed utilizing the 3-strand docking technique with or without suture augmentation. A 3-N·m valgus torque was applied to the elbow, and valgus rotation of the ulna was recorded via motion-tracking cameras as the elbow was cycled through a full range of motion. After kinematic testing, reconstructed specimens were loaded to failure at 70° of elbow flexion. Results: UCL-deficient elbows demonstrated significantly greater valgus rotation when compared with intact and internally braced reconstructed elbows at every angle of flexion tested and when compared with unbraced UCL-reconstructed elbows at 50° to 120° of flexion ( P < .05). There were no significant differences between intact and UCL-reconstructed elbows with and without suture augmentation at any flexion angle tested. When loaded to failure, unbraced reconstructed elbows failed at a significantly lower torque as compared with elbows with UCL reconstruction with suture tape augmentation ( P < .01). Conclusion: In this cadaveric model, 3-strand UCL reconstruction with suture augmentation did not overconstrain the elbow throughout all flexion angles when compared with the native state and UCL reconstruction alone, while providing greater load to failure. Clinical Relevance: Suture tape augmentation may provide the additional strength necessary to accelerate rehabilitation after UCL reconstruction.

Failure of rotator cuff repair can be a disastrous clinical outcome. Although failure is a multifactorial issue, recent interest has piqued in understanding the biology of the insertional components of the supraspinatus and infraspinatus at the footprint. When the torn tendon is of poor quality, especially if it is diminutive or thin, rotator cuff repair augmentation should be considered to aid in long-term healing. Various allograft options have been described in the past, and more recently, xenografts and synthetics have become more commonly used. The use of autografts in the treatment of insertional footprint deficiency has great potential; however, few grafts have been described. This study describes the surgical technique for footprint augmentation in arthroscopic supraspinatus repair using harvested autologous coracoacromial ligament tissue.

Objective Clinicians’ overdependence on p-values to determine significance in clinical trials is common yet potentially misleading. The Fragility Index (FI) describes how robust a significant result is by determining the number of events the statistical significance hinges on. However, this concept cannot be applied to nondichotomous variables. We describe a method to calculate a Continuous Fragility Index (CFI) for continuous variables. We further provide a method to estimate CFI when original data is not available. Study Design and Setting An iterative substitution algorithm is described to calculate CFI prospectively from data or retrospectively from summary statistics and its response to variations in the data is reported. We then apply this method to a previously published review as a proof-of-concept. Results The CFI increases linearly with sample size, logarithmically with mean difference, and decreases exponentially with standard deviation. Forty-eight studies were included of which 30 had significant non-dichotomous outcomes. CFI and FI were uncorrelated and mean CFI was significantly higher than FI (9 vs. 2, P Conclusion Our algorithm extends fragility to continuous outcomes, expanding the applications of the fragility concept. The fragility of outcomes within a single study may vary based on variable type and should be evaluated independently.

PURPOSE OF REVIEW: Traditionally medial elbow injuries in overhead athletes have been treated with ulnar collateral ligament (UCL) reconstruction as first described by Dr. Frank Jobe. Recent literature has shown favorable outcomes in select patients treated with UCL repair. Newer techniques utilizing suture augmentation demonstrate biomechanical profiles as good or better than the native state and/or reconstruction. This review aims to evaluate these biomechanical studies and the clinical outcomes of ulnar collateral ligament repair with suture augmentation. RECENT FINDINGS: UCL repair has favorable outcomes in select patients with specific tear type patterns. Clinical outcomes have shown return to play rates of 92–97% with mean time of 2.5–6 months post-operatively. Biomechanical data comparing UCL repair to reconstruction techniques have shown improved resistance to common forces applied to the elbow during overhead activities. Additionally, suture tape augmentation dramatically improves stability of ligament repair without over-constraining the elbow. SUMMARY: Initial ulnar collateral ligament repair data was poor, and thus UCL reconstruction became the mainstay of treatment for overhead athletes. Recent studies evaluating the biomechanical properties as well as clinical outcomes have demonstrated favorable data when UCL repair is performed. When considering the drawbacks of a prolonged recovery associated with reconstruction, UCL repair is a viable option in select patients.

Background The purpose of this study was to compare the biomechanical properties of an anterior cruciate ligament (ACL) anatomic repair of a true femoral avulsion to an anatomic ACL reconstruction. It was hypothesized that the ACL repair and ACL reconstruction would have comparable biomechanical behavior when compared to the native knee. Methods Ten paired fresh-frozen cadaveric knees (n = 20) were used to investigate knee kinematics when an anterior drawer force, varus, valgus, internal, and external rotational moment were applied at 0, 15, 30, 45, 60, and 90 degrees of flexion. Displacement and rotation were recorded in the following conditions: ACL-intact, ACL-deficient, and ACL-repaired vs reconstructed. Results Sectioning of the ACL significantly increased anterior tibial translation (0°, 15°, 30° and 45°) compared to the intact state. The mean anterior displacement difference from intact was lower in the ACL-repaired knees compared to reconstructed knees at 30° and 90°. There were no significant differences between conditions in varus, valgus, internal, or external rotations. Conclusion ACL repair and ACL reconstruction procedures restored knee anterior tibial translation in matched paired specimens. There were no differences in valgus, varus, internal, or external rotation. Although, ACL-repaired knees (avulsion model) demonstrated less anterior tibial translation when compared to ACL-reconstructed knees, this difference was less than one millimeter. Based on the findings of this study, repair and reconstruction procedures both restored anterior tibial translation in matched-pair specimens. This suggests that the initial functionality of both techniques is similar and that further clinical studies are needed to compare the long-term stability.

Background: Chronic attritional midsubstance capsular tears arising from repetitive throwing stress are a rare but important source of pain and dysfunction in elite baseball players; however, little is known regarding outcomes after arthroscopic capsular repair. Purpose: To evaluate the patient-reported outcomes and return-to-sport (RTS) rates after arthroscopic capsular repair in elite baseball players. Study Design: Case series; Level of evidence, 4. Methods: We identified 11 elite-level baseball players who were treated with arthroscopic repair for a midsubstance glenohumeral capsular tear by a single surgeon with a uniform approach and a standardized postoperative protocol between 2012 and 2019. All players had at least 2 years of follow-up data. Demographic data and concomitant surgical procedures were recorded. Preoperative and postoperative Kerlan-Jobe Orthopaedic Clinic (KJOC) scores and Single Assessment Numeric Evaluation (SANE) scores were collected in a subset of the cohort, and statistical comparisons were made. A telephone survey was conducted to determine the patients’ RTS level and outcome scores. Statistical comparisons between preoperative and postoperative outcomes scores were made using t tests. Results: Eight major league players, 1 minor league player, and 2 collegiate players were included. There were 9 pitchers, 1 catcher, and 1 outfielder. All patients had debridement of the posterosuperior labrum and rotator cuff. Two pitchers underwent a rotator cuff repair, and 1 outfielder underwent a posterior labral repair. The mean age at the time of surgery was 26.9 years (range, 20-34 years), with a mean follow-up of 3.5 years (range, 2.6-5.9 years). There were significant preoperative versus postoperative improvements in the mean KJOC (20.6 vs 89.8; P = .0002) and SANE (28.3 vs 86.7; P = .001) scores. All patients reported a high degree of satisfaction. At a mean of 16.3 months (range, 6.5-25.4 months), 10 of 11 (90.1%) players met the Conway-Jobe good or excellent criteria for RTS. Conclusion: Arthroscopic capsular repair provided significant improvements in functional outcomes in elite baseball players, high levels of patient satisfaction, and high levels of RTS.

Background: The transosseous-equivalent (TOE) rotator cuff repair construct has become the gold standard for the repair of medium and large rotator cuff tears. Repair failure, however, continues to be a problem. One contributing factor may be the inability of the TOE repair to replicate the native footprint contact characteristics during shoulder movement, especially in rotation. This results in higher strain across the repair, which leads to gapping and predisposes the construct to failure. In an effort to better reproduce the native compression forces throughout the footprint, an augmented TOE construct supplemented with lateral edge fixation is proposed, and the contact characteristics were compared with those of the gold standard TOE construct. Hypothesis: The augmented TOE repair will demonstrate improved footprint contact characteristics when compared with the classic TOE repair. Study Design: Controlled laboratory study. Methods: Ten fresh-frozen cadaveric shoulders underwent supraspinatus repair using both the classic TOE double-row construct and the augmented TOE repair. For the augmented repair, 2 luggage tag sutures were used to secure the lateral edge and incorporated into the lateral row anchors. A Tekscan pressure sensor (Tekscan Inc) placed under the repaired tendon was used to collect footprint contact area, force, peak pressure, and contact pressure data for each construct. Results: The augmented construct demonstrated significantly greater contact forces (average difference, 4.9 N) and significantly greater contact pressures (average difference, 23.1 kPa) at all degrees of abduction and all degrees of rotation. At 30° of internal and 30° of external rotation at both 0° and 30° of shoulder abduction, the augmented construct demonstrated significantly greater peak contact pressures. Conclusion: The augmented construct showed superior contact characteristics when compared with the classic TOE technique. The addition of lateral edge fixation to the classic TOE repair significantly improves bone-tendon contact characteristics with minimal additional surgical effort. Clinical Relevance: The results of this study indicate that lateral augmentation of the classic TOE repair produces a biomechanically superior construct that may optimize tendon healing.

Anterior knee pain and patella fracture are 2 potential complications of bone-patellar-bone autograft anterior cruciate ligament reconstruction. Techniques have been developed to minimize the risk of these complications, including filling the defects with autologous bone fragments and augmenting with biologic agents. We have developed a technique that uses a graft collection device to collect the autologous bone graft generated during surgery. This graft augments the larger bone graft derived from the bone plugs. This autologous augmentation provides a complete biologic strategy to potentially reduce the risk of anterior knee pain and potential patella fracture.

Objectives: A common concern associated with elbow ulnar collateral ligament (UCL) reconstruction surgery is the amount of time required for recovery and rehabilitation. For example, the average time to return to competition is around 15-18 months for major league baseball pitchers. The Internal Brace (Arthrex Inc.) has shown to provide additional soft tissue stability across other joints in the body. By providing an additional checkrein to the UCL reconstruction while the graft is healing, it may be possible to expedite the rehabilitation process in throwing athletes, providing a quicker return to sport. Purpose: To compare elbow valgus stability and load to failure between UCL reconstructions with and without suture augmentation. Methods: 24 fresh-frozen cadaveric elbows were dissected to expose the UCL. Medial elbow stability was tested with the UCL intact, deficient, and reconstructed utilizing the 3-ply docking technique either with or without suture augmentation. A 3 N·m valgus torque was applied to the elbow and valgus rotation of the ulna was recorded via motion tracking cameras as the elbow was cycled through a full range of motion. After kinematic testing, specimens were loaded to failure at 70 degrees of elbow flexion. Results: UCL-deficient elbows demonstrated significantly greater valgus rotation compared to intact and internally-braced reconstructed elbows at every angle of flexion tested and at 50-120o flexion when compared to un-braced UCL reconstructed elbows, pConclusions: UCL reconstruction with internal bracing does not over constrain the elbow throughout all flexion angles when compared to the 3-ply docking technique while providing greater biomechanical stiffness. Internal bracing may provide the additional stability necessary to accelerate rehabilitation following ulnar collateral ligament reconstruction.

Background: Medial ulnar collateral ligament (mUCL) repair is growing in popularity as a treatment for younger athletes with mUCL tears. One of the most recent techniques utilizes a collagen-coated suture tape to augment the repair. The most popular repair technique uses a screw for proximal fixation in the humerus. We present an alternative technique that uses suspensory fixation in the proximal humerus. Purpose: To biomechanically compare elbow valgus stability and load to failure of a novel alternative repair technique with suspensory fixation to an mUCL reconstruction. Study Design: Controlled laboratory study. Methods: Eighteen fresh-frozen cadaveric elbows were dissected to expose the mUCL. Medial elbow stability was tested with the mUCL in an intact, deficient—either repaired or reconstructed—state. The repair technique used a suspensory fixation with suture augmentation, and the docking technique was used on all reconstructions. A 3-N·m valgus torque was applied to the elbow, and valgus rotation of the ulna was recorded via motion tracking cameras as the elbow was cycled through a full range of motion. After kinematic testing, specimens were loaded to failure at 70° of elbow flexion. Results: Both ulnar collateral ligament reconstruction and repair restored valgus stability to levels that were not statistically different from intact at all angles of flexion. There was no significant difference in the ultimate torque to failure between repaired and reconstructed mUCLs. Conclusion: There was no significant difference in the valgus strength between the mUCL repair with suspensory fixation and the mUCL reconstruction. Clinical Relevance: Suspensory fixation is an alternative method for proximal fixation in the mUCL without compromising the strength of the construct.

To determine the postsurgical strength and stiffness of anterior cruciate ligament (ACL) reconstructions with (ACLR-SA) and without suture tape augmentation (ACLR) in a human cadaveric model.Eight matched pairs of cadaveric knees were tested intact and after bone-patellar tendon-bone ACL reconstruction. Specimens were potted and loaded onto a mechanical testing system, and an anterior drawer force of 88N was applied at 0°, 15°, 30°, 60°, and 90° of flexion. Specimens were then loaded to failure, with clinical failure defined as anterior translation greater than 10 mm.ACL-intact knees translated an average of 4.99 ± 0.28 mm across all flexion angles when an 88N anterior load was applied. ACLR knees had significantly greater translation compared to intact specimens. ACLRs with suture augmentation had less of an increase (0.67 mm, 95% confidence interval [CI]: 0.20, 1.14,Augmentation of ACLR with suture tape allowed full range of motion with improved graft stiffness and increased failure load compared to unaugmented ACLR in this time-zero study.Internal bracing may help reinforce ACLR grafts and allow for acceleration of rehabilitation protocols and earlier return to activity.

The purpose of this study is to report the change in surgical case volume and composition encountered by a multi-subspecialty orthopaedic practice due to COVID-19. We reviewed electronic medical records for patients who had surgery at our institution and collected multiple variables including age and the joint that was operated on. In the post-COVID-19 period, we found a significant increase in the percentage of hip procedures, and a significant decrease in the percentage of hand/wrist procedures. Overall, the total surgical volume of our multi-subspecialty orthopaedic practice decreased due to the COVID-19 pandemic, and the composition of surgical cases changed.

Background: The COVID-19 pandemic has had a wide-reaching impact. Graduate medical education of orthopedic surgeons was not spared from the jarring changes. Purpose: We sought to survey fellowship program directors in the field of orthopedic surgery about how the COVID-19 pandemic affected the education of the 2019 to 2020 and 2020 to 2021 fellowship classes and the future of their programs. Methods: In October 2020, an 18-item survey was distributed by an official of the American Academy of Orthopedic Surgeons (AAOS) to the specialty societies that govern fellowship training. Each specialty society then distributed the survey to its respective program directors. A reminder email was sent during the enrollment period. Each respondent was able to complete the survey once. Survey questions were grouped into 3 sections: general information about the fellowship training programs, the impact of COVID-19 on the 2019 to 2020 fellowship class, and the future impact of COVID-19 on the fellowship training programs. Results: Of the 564 accredited orthopedic surgery fellowship programs in the United States, 190 directors responded. Of these, 73.59% reported COVID-19 had a negative impact on the 2019 to 2020 fellowship class. A normal distribution of responses was found regarding didactic and academic learning, research, and mentorship opportunities. A majority of respondents said they believe that there will be no negative impact on patient care the fellows provide in the years to come. Conclusion: Orthopedic surgery fellowship program directors acknowledged that while there were negative effects to training in the pandemic, they did not think these would negatively affect patient care provided by 2019 to 2020 fellows in the short and medium term. They also reported positive outcomes from the experience of the pandemic, including new ways to educate fellows.

Anterior cruciate ligament reconstruction (ACLR) technique for femoral tunnel drilling varies substantially, each with advantages and disadvantages. The purpose of this study was to define ACLR femoral tunnel technique predilection among surgeons and to explore factors associated with their preference.An 11-question survey regarding ACLR femoral tunnel technique was completed by 560 AANA/AOSSM members. Surgeon and practice demographics and residency and fellowship experiences were evaluated with bivariate and multivariable models for association with surgeon preference.In current practice, 55% of surgeons prefer anteromedial (AM) portal drilling, 32% retrograde, and 14% transtibial (TT). Sports Medicine fellowship experience was the strongest predictor of current practice (p 0.001), followed by residency technique (p = 0.014). A significant increase in TT drilling was noted for those practicing15 years TT (29% vs 3%, p 0.001), with an inverse relationship for retrograde drilling (38% vs 21%, p 0.001). Number of ACLRs/year and percent Sports specific practice were significant predictors for AM drilling (p 0.001). Though less than AM and retrograde, TT was more common for those in private practice (17% vs 8%, p 0.001), and more prevalent in the Midwest/Southeast (19% vs 10%, p = 0.003). Non-significant predictors included highest level of athlete for whom an ACLR had been performed, level of athlete serving as team physician, and Certificate of Added Qualifications status.Surgeon training, practice setting, and years in practice significantly predict preference for femoral tunnel drilling technique. Surgeon comfort and confidence in attaining an anatomic reconstruction should drive choice of technique.

Supplemental material, sj-pdf-2-hss-10.1177_15563316211012006 for The Impact of COVID-19 on Orthopedic Surgery Fellowship Training: A Survey of Fellowship Program Directors by Braiden M. Heaps, Jeffrey R. Dugas and Orr Limpisvasti in HSS Journal®: The Musculoskeletal Journal of Hospital for Special Surgery

Supplemental material, sj-pdf-1-hss-10.1177_15563316211012006 for The Impact of COVID-19 on Orthopedic Surgery Fellowship Training: A Survey of Fellowship Program Directors by Braiden M. Heaps, Jeffrey R. Dugas and Orr Limpisvasti in HSS Journal®: The Musculoskeletal Journal of Hospital for Special Surgery

The purpose of this study was to define the anterior cruciate ligament (ACL) reconstruction (ACLR) graft preference of surgeons and to explore factors associated with their predilection.A 15-question survey regarding ACLR graft preference in various situations was completed by 514 American Orthopaedic Society for Sports Medicine and Arthroscopy Association of North America surgeons. Surgeon and practice demographics, along with various patient factors, were evaluated with bivariate and multivariable models for association with surgeon preference. Surgeons were also queried about their preference for their own ACLR. For surgeons who personally sustained an ACL, an additional 6 questions inquired about their experience.Surgeons reported the 5 most important factors in patient graft choice, in order: patient age, graft failure in literature and practice, pivot sport, and patient preference. Autograft patellar and quadriceps tendon were strongly preferred for younger, pivoting athletes (P.001), among those with fellowship training (47% vs 33%, P = .006), in academic practices (52% vs 44%, P = .003), and in more sports medicine-specific practices, with a higher number of ACLRs performed per year (P.001). Northeast, Southeast, Midwest, and Southwest surgeons had lower hamstring autograft preference (P.001). Non-fellowship-trained surgeons preferred hamstring autograft (P = .010). Allograft was preferred for older patients (P.001). Nonsignificant predictors included highest level of athlete for whom an ACLR had been performed, level of athlete serving as team physician, and years in practice. No factors were associated with surgeon preference for their own ACLR despite deeming these factors important for patients. ACL tears were reported by 13% of respondents, with 86% stating it influenced their decision to enter orthopaedics.Patient age was the most important factor in graft choice, with patellar and quadriceps tendon autograft the preferred graft for ACLR for younger, pivoting athletes. Fellowship training and practice demographics were also correlated with graft choice for patients.Graft preference for ACLR varies among surgeons and is associated with surgeon experience and patient characteristics, including patient age, type of sport, and patient preference.

Background: Return to play and player satisfaction have been quite high after ulnar collateral ligament reconstruction (UCLR); however, there has been little reported on how outcomes are affected by surgical technique, graft type, and tear characteristics. Purpose: To evaluate surgical techniques, graft type, and tear characteristics on Major League Baseball (MLB) performance after UCLR. Study Design: Cohort study; Level of evidence, 2. Methods: MLB pitchers who underwent primary UCLR at a single institution were included. Tear characteristics included tear location, tear grade, and acuity. Surgical technique and graft type were also collected. Pitching performance statistics, including earned run average (ERA), walks and hits per innings pitched (WHIP), innings pitched, and fastball velocity were evaluated 3 years before and after UCLR. Results: Forty-six MLB pitchers were identified as having primary UCLR. Return to play was 96%, with 82% returning to MLB play. Technique performed showed no difference in performance. As compared with pitchers with gracilis grafts, pitchers with palmaris grafts were younger ( P = .043), played longer after surgery ( P = .012), and returned to play at 100% (35 of 35) versus 82% (9 of 11, P = .010). When compared with pitchers with proximal tears, pitchers with distal tears pitched at higher velocity (93.0 vs 90.6 mph, P = .023) and had better performance before surgery (ERA, P = .003; WHIP, P = .021); however, those with proximal tears improved to match this performance and velocity after reconstruction. As compared with those having partial tears, pitchers with complete tears played longer after surgery (5.9 vs 4.0 years, P = .033), had a better ERA before injury ( P = .041), and had better WHIP ( P = .037) and strikeouts per 9 innings ( P = .025) after reconstruction. Pitchers with chronic tears had a significant improvement in postoperative ERA, from 4.49 to 3.80 ( P = .040). Conclusion: Technique performed and graft type used did not affect performance; however, pitchers with palmaris grafts returned at a higher rate than those with gracilis grafts. Distal tears occurred in pitchers with greater velocity and better performance before injury, yet pitchers with proximal tears matched this performance after reconstruction. Pitchers with complete tears played longer after reconstruction. Pitchers who had partial tears had worse performance before injury and after reconstruction, and those with chronic tears saw a significant improvement in ERA with reconstruction.

Background:Blood flow restriction (BFR) training involves low-weight exercises performed under vascular occlusion via an inflatable cuff. For patients who cannot tolerate high-load exercises, BFR training reportedly provides the benefits of high-load regimens, with the advantage of less tissue and joint stress.Hypothesis:Low-load BFR training is safe and efficacious for strengthening muscle groups proximal, distal, and contralateral to tourniquet placement in the lower extremities.Study Design:Randomized controlled trial.Level of Evidence:Level 1.Methods:This was a randomized controlled trial of healthy participants completing a standardized 6-week course of BFR training. Patients were randomized to BFR training on 1 extremity or to a control group. Patients were excluded for cardiac, pulmonary, or hematologic disease; pregnancy; or previous surgery in the extremity. Data collected at baseline and completion included limb circumferences and strength testing.Results:The protocol was completed by 26 patients, providing 16 BFR and 10 control patients (mean patient age, 27 years; 62% female). A statistically greater increase in strength was seen proximal and distal to the BFR tourniquet when compared with both the nontourniquet extremity and the control group ( P < 0.05). Approximately twice the improvement was seen in the BFR group compared with controls. Isokinetic testing showed greater increases in knee extension peak torque (3% vs 11%), total work (6% vs 15%), and average power (4% vs 12%) for the BFR group ( P < 0.04). Limb circumference significantly increased in both the thigh (0.8% vs 3.5%) and the leg (0.4% vs 2.8%) compared with the control group ( P < 0.01). Additionally, a significant increase occurred in thigh girth (0.8% vs 2.3%) and knee extension strength (3% vs 8%) in the nontourniquet BFR extremity compared with the control group ( P < 0.05). There were no reported adverse events.Conclusion:Low-load BFR training led to a greater increase in muscle strength and limb circumference. BFR training had similar strengthening effects on both proximal and distal muscle groups. Gains in the contralateral extremity may corroborate a systemic or crossover effect.Clinical Relevance:BFR training strengthens muscle groups proximal, distal, and contralateral to cuff placement. Patients undergoing therapy for various orthopaedic conditions may benefit from low-load BFR training with the advantage of less tissue stress.

Purpose To identify, characterize, and compare the resident progenitor cell populations within the red−red, red−white, and white−white (WW) zones of freshly harvested human cadaver menisci and to characterize the vascularity of human menisci using immunofluorescence and 3-dimensional (3D) imaging. Methods Fresh adult human menisci were harvested from healthy donors. Menisci were enzymatically digested, mononuclear cells isolated, and characterized using flow cytometry with antibodies against mesenchymal stem cell surface markers (CD105, CD90, CD44, and CD29). Cells were expanded in culture, characterized, and compared with bone marrow−derived mesenchymal stem cells. Trilineage differentiation potential of cultured cells was determined. Vasculature of menisci was mapped in 3D using a modified uDisco clearing and immunofluorescence against vascular markers CD31, lectin, and alpha smooth muscle actin. Results There were no significant differences in the clonogenicity of isolated cells between the 3 zones. Flow cytometry showed presence of CD44+CD105+CD29+CD90+ cells in all 3 zones with high prevalence in the WW zone. Progenitors from all zones were found to be potent to differentiate to mesenchymal lineages. Larger vessels in the red−red zone of meniscus were observed spanning toward red−white, sprouting to smaller arterioles and venules. CD31+ cells were identified in all zones using the 3D imaging and co-localization of additional markers of vasculature (lectin and alpha smooth muscle actin) was observed. Conclusions The presence of resident mesenchymal progenitors was evident in all 3 meniscal zones of healthy adult donors without injury. In addition, our results demonstrate the presence of vascularization in the WW zone. Clinical Relevance The existence of progenitors and presence of microvasculature in the WW zone of the meniscus suggests the potential for repair and biologic augmentation strategies in that zone of the meniscus in young healthy adults. Further research is necessary to fully define the functionality of the meniscal blood supply and its implications for repair.

The aim of the present study was to evaluate and compare the effectiveness of the silver-zinc bioelectric dressing as compared with skin preparation with 2% chlorhexidine or 4% chlorhexidine in reducing the bacterial count on the knee.Three groups consisting of 48 healthy volunteers were included. Age range was 23 to 54 years old and 60% of participants were male. Each subject had 1 knee serve as the test and the contralateral as the control. The test site was prepared with either 2% chlorhexidine, 4% chlorhexidine, or a silver-zinc bioelectric dressing and after 24 hours skin cultures were taken and examined for bacterial growth.In the 2% chlorhexidine group 23 of 48 unprepped knees had positive cultures, compared with 9 of 48 prepped knees (P = .003; risk reduction, 4.0 times). In the 4% chlorhexidine group 25 of 48 unprepped knees had positive cultures, compared with 14 of 48 prepped knees (P = .027; risk reduction, 2.6 times). In the silver-zinc bioelectric dressing group 29 of 48 unprepped knees had positive cultures, compared with 7 of 48 prepped knees (P.001; risk reduction, 8.9 times). There was no difference in the positive skin culture rate between the 3 methods.Application of the silver-zinc bioelectric dressing was equally effective at reducing skin bacterial load when compared with skin preparation with 2% chlorhexidine or 4% chlorhexidine in healthy volunteers.Basic Science - Microbiology.The findings of this study indicate that the use of a bioelectric dressing after knee surgery can match the standard of care of preparing the skin with an antiseptic before surgery.

Background: Ulnar collateral ligament (UCL) reconstruction (UCLR) has shown reliable rates of return to play, with conflicting results on pitching performance after players’ return. Purpose: To evaluate Major League Baseball (MLB) pitching performance before and after UCLR performed at a single institution. Study Design: Cohort study; Level of evidence, 3. Methods: MLB pitchers (minor league players were excluded) who underwent UCLR at our institution between 2002 and 2016 were identified. Player information and return to play were determined including pitching level (MLB vs minor league) and total number of years played after surgery. Pitching performance statistics were evaluated for 3 years before surgery and for 3 years after returning to play including earned run average (ERA), walks plus hits per inning pitched (WHIP), innings pitched, wins above replacement, runs above replacement, and pitch velocity. Results: A total of 54 MLB pitchers were identified, with 46 primary and 8 revision reconstructions. The mean time to return to play was 13.8 months (primary reconstruction: 13.7 months). The majority returned to play with a 94% return rate (primary reconstruction: 96%), and 80% returned to MLB play (primary reconstruction: 82%). Three primary reconstructions required revision surgery. Pitchers played a mean of 3.2 years in MLB and 4.6 years total after surgery (39% still playing). Pitching workload and performance were maintained or improved after surgery. The preoperative ERA was 4.63 versus 4.13 after returning to play ( P = .268). Fastball velocity ( P = .032), ERA ( P = .003), and WHIP ( P = .001) worsened the first year after surgery and then improved the second year (ERA: 4.63 to 4.06 [ P = .380]; WHIP: 1.35 to 1.32 [ P = .221]; fastball velocity: 91.3 to 91.9 mph [ P = .097]). Compared with a matched control group, pitchers who had UCLR showed improvements or maintained performance after reconstruction including improved ERA ( P = .007), WHIP ( P = .025), and fastball velocity ( P = .006). Conclusion: MLB players experienced a high rate of return to play and previous level of play after UCLR. Pitching workload was maintained after returning to play. Pitching performance initially decreased the first year after returning and then improved or reverted to previous levels after the first year from UCLR.

Increasing numbers of people are playing golf. Golf is a unique sport in that the ability to participate at a high level is not limited by age. In addition, participants tend to play more rather than less as they grow older. Injuries can occur at any point during the golf swing, from takeaway through follow-through. Upper extremity injuries can affect the hands, elbow, and shoulder and are usually a result of the golf swing at impact. Injuries are also common in the lower back as well as the lower extremities. Most injuries are the result of overuse and poor swing mechanics. When treating golfers, it is important to have a good understanding of the biomechanics and forces of the golf swing to diagnose and manage the vast spectrum of injuries incurred in this sport.

Context: Current perception dictates that glenohumeral internal rotation deficit (GIRD) is a chronic adaptation that leads to an increased risk of pathologic conditions in the dominant shoulder or elbow of overhead athletes. Objective: To determine whether adaptations in glenohumeral range of motion in overhead athletes lead to injuries of the upper extremity, specifically in the shoulder or elbow. Data Sources: An electronic database search was performed using Medline, Embase, and SportDiscus from 1950 to 2016. The following keywords were used: GIRD, glenohumeral internal rotation deficit, glenohumeral deficit, shoulder, sport, injury, shoulder joint, baseball, football, racquet sports, volleyball, javelin, cricket, athletic injuries, handball, lacrosse, water polo, hammer throw, and throwing injury. Study Selection: Seventeen studies met the inclusion criteria for this systematic review. Of those 17 studies, 10 included specific range of motion measurements required for inclusion in the meta-analysis. Study Design: Systematic review and meta-analysis. Level of Evidence: Level 4. Data Extraction: Data on demographics and methodology as well as shoulder range of motion in various planes were collected when possible. The primary outcome of interest was upper extremity injury, specifically shoulder or elbow injury. Results: The systematic review included 2195 athletes (1889 males, 306 females) with a mean age of 20.8 years. Shoulders with GIRD favored an upper extremity injury, with a mean difference of 3.11° (95% CI, –0.13° to 6.36°; P = 0.06). Shoulder total range of motion suggested increased motion (mean difference, 2.97°) correlated with no injury ( P = 0.11), and less total motion (mean difference, 1.95°) favored injury ( P = 0.14). External rotational gain also favored injury, with a mean difference of 1.93° ( P = 0.07). Conclusion: The pooled results of this systematic review and meta-analysis did not reach statistical significance for any shoulder motion measurement and its correlation to shoulder or elbow injury. Results, though not reaching significance, favored injury in overhead athletes with GIRD, as well as rotational loss and external rotational gain.

Infection is a concern after all orthopedic procedures, including shoulder surgery. This systematic review of literature aimed to determine risk factors for infection as well as the availability and effectiveness of measures utilized to prevent infection after elective shoulder surgery. An electronic database search was performed using MEDLINE (1950–October 2017), EMBASE (1980–October 2017), CINAHL (1982–October 2017), and the Cochrane database to identify studies reporting a risk factor or preventive measure for infection after shoulder surgery. Fifty-one studies were eligible for inclusion. Risk factors identified for infection were male sex, the presence of hair, receiving an intra-articular cortisone injection within the 3 months prior to surgery, smoking, obesity, and several comorbidities. The only preventive measure with level I evidence was for the use of chlorhexidine wipes for cleansing the skin in the days prior to surgery and for the use of ChloraPrep or DuraPrep over povodine and iodine to prep the skin at the time of surgery. Level II–IV evidence was found for other infection prevention methods such as intravenous antibiotic prophylaxis. There are many risk factors associated with developing an infection after elective shoulder surgery. Many preventive measures have been described which may decrease the risk of infection; however, most lack a high level evidence to support them. The findings of this systematic review are clinically relevant as it has been shown that infection after shoulder surgery results in poor patient-reported outcomes and pose a significant financial burden. As surgeons the goal should be to prevent infections to avoid the morbidity for patients and the increased cost for society. IV systematic review of literature.

Background Biomechanical and clinical success of the superior capsule reconstruction (SCR) using fascia lata (FL) grafts has been reported. In the United States, human dermal (HD) allograft has been used successfully for SCRs; however, the biomechanical characteristics have not been reported. Methods Eight cadaveric shoulders were tested in 5 conditions: (1) intact; (2) irreparable supraspinatus tear; (3) SCR using FL allograft with anterior and posterior suturing; (4) SCR using HD allograft with anterior and posterior suturing; and (5) SCR using HD allograft with posterior suturing. Rotational range of motion, superior translation, glenohumeral joint force, and subacromial contact were measured at 0°, 30°, and 60° of glenohumeral abduction in the scapular plane. Graft dimensions before and after testing were also recorded. Biomechanical parameters were compared using a repeated-measures analysis of variance with Tukey post hoc test, and graft dimensions were compared using a Student t-test (P Results Irreparable supraspinatus tear significantly increased superior translation, superior glenohumeral joint force, and subacromial contact pressure, which were completely restored with the SCR FL allografts. Both SCR HD allograft repairs partially restored superior translation and completely restored subacromial contact and superior glenohumeral joint force. The HD allografts significantly elongated by 15% during testing, whereas the FL allograft lengths were unchanged. Conclusions Single-layered HD SCR allografts partially restored superior glenohumeral stability, whereas FL allograft SCR completely restored the superior glenohumeral stability. This may be due to the greater flexibility of the HD allograft, and the SCR procedure used was developed on the basis of FL grafts.

Background: No validated functional assessments are available that are designed specifically to evaluate the performance and function of the athletic hip. Subsections of some validated outcome assessments address recreation, but a full assessment dedicated to athletic hip function does not exist. Current hip scoring systems may not be sensitive to subtle changes in performance and function in an athletic, younger population. Hypothesis: The patient-athlete subjective scoring system developed in this study will be validated, reliable, and responsive in the evaluation of hip function in the athlete. Study Design: Cross-sectional study; Level of evidence, 3. Methods: Based on the results of a pilot questionnaire administered to 18 athletic individuals, a final 10-item questionnaire was developed. Two hundred fifty competitive athletes from multiple sports completed the final questionnaire and 3 previously validated hip outcome assessments. Each athlete was self-assigned to 1 of 3 injury categories: (1) playing without hip/groin trouble; (2) playing, but with hip/groin trouble; and (3) not playing due to hip/groin trouble. The injury categories contained 196, 40, and 14 athletes, respectively. Correlations between the assessment scores and injury categories were measured. Responsiveness testing was performed in an additional group of 24 injured athletes, and their scores before and after intervention were compared. Results: The Kerlan-Jobe Orthopaedic Clinic (KJOC) Athletic Hip Score showed high correlation with the modified Harris Hip Score, the Nonarthritic Hip Score, and the International Hip Outcome Tool. The new score stratified athletes by injury category, demonstrated responsiveness and accuracy, and varied appropriately with improvements in injury category after treatment of injuries. Conclusion: The new KJOC Athletic Hip Score is valid, reliable, and responsive for evaluation of the hip in an athletic population. The results support its use for the functional assessment of the hip in future studies.

Background The Kerlan-Jobe Orthopedic Clinic shoulder and elbow score (KJOC score) was developed for assessing performance and function in overhead athletes with shoulder and elbow injury and recently adapted as the standard score for overhead athletes in Major League Baseball. However, the Korean version of the KJOC score was not developed in the literature. The aim of the current study was to adapt the English version of the KJOC score to develop a Korean version (K-KJOC) and to evaluate its validity and reliability. Methods A total of 52 professional baseball players in the Korean Baseball League completed the K-KJOC at two-week intervals during the off-season. The QuickDASH (11-point Disabilities of the Arm, Shoulder and Hand) score was also performed to evaluate the construct validity of the K-KJOC score. The internal consistency of reliability and test–retest reliability were assessed as well. Results The K-KJOC score was correlated with the Quick DASH – disability/symptom (−0.309, ~−0.268, p

The purpose of this study was to compare standard knee arthroscopic and MRI findings and measurements for visualization of the femoral condyle articular cartilage. The hypothesis was that certain posterior cartilage defects identified with MRI may not be accessible with routine arthroscopy.Six cadaveric knees were examined by routine arthroscopy through standard inferomedial and inferolateral portals. Suture anchors were inserted into the femoral condyles at 30°, 60°, 90°, and 120° of flexion as markers of the cartilage surface at the most posterior aspect of the condyle that could be accessed at each degree of flexion. Each specimen was then examined with 3-T MRI and gross dissection. Measurements were obtained and compared.During arthroscopy at 90° of knee flexion, only 5.83 mm of the medial femoral condyle and 6.83 mm of the lateral femoral condyle were visualized posterior to the anchor placed at 90° of flexion. These arthroscopic measurements were statistically significant underestimates of the actual amount of cartilage identified posterior to the 90° anchor at gross dissection (medial condyle, 44.20 mm; lateral condyle, 37.50 mm) and MRI (medial, 41.33 mm; lateral, 38.87 mm). This indicates that 85.9% of the medial and 81.8% of the lateral posterior articular cartilage of the femoral condyle seen at MRI were not visualized during arthroscopy.More than 80% of the articular cartilage proximal to the menisci seen at MRI is not visible during routine arthroscopy. This far posterior articular cartilage should be called the hidden zone.

The anterior cruciate ligament (ACL) is the most common ligamentous knee injury and often is encountered in those participating in multidirectional sports. ACL reconstruction is the most commonly performed knee ligament reconstruction and employs a variety of surgical techniques but still is challenged by residual laxity and graft rupture. To help address and prevent future ACL failures, new repair and reconstruction techniques have been employed that incorporate suture augmentation (InternalBrace; Arthrex, Naples, FL), which protects the graft during healing and ligamentization. Our goal of this article is to provide a surgical technique of suture augmentation with ACL reconstruction.

PURPOSE OF REVIEW: Primarily reported in the overhead throwing athlete, ulnar collateral ligament (UCL) injuries have been extensively studied since Dr. Frank Jobe first described his technique for ulnar collateral ligament reconstruction on professional baseball pitcher Tommy John. While the framework for our understanding of UCL injury was initially established studying the repetitive valgus loading of the throwers’ elbow, other sport-related activities in non-throwing athletes can impart similar valgus stress on the medial elbow placing the UCL at risk for injury. The purpose of this review is to evaluate the current literature on UCL injury specifically in the non-throwing athlete. RECENT FINDINGS: In the four decades since Dr. Jobe’s seminal description of UCL reconstruction, an abundance of literature has been published on UCL injury in the throwing athlete. The evidence evaluating the UCL specifically in the non-throwing athlete, however, is quite scarce. Several small retrospective studies have demonstrated good results with high rates of return to play with focused rehabilitation and non-operative management in non-throwing athletes. Recent evidence has also demonstrated that surgical repair and/or reconstruction of the UCL in this population can produce good outcomes. SUMMARY: The level of evidence of these published studies is low and consists primarily of case series without control groups. Further investigation is warranted to determine the optimal treatment algorithm for UCL injury in the non-throwing athlete.

Recent orthopedic literature has shown that primary repair for femoral-sided avulsion tears of the anterior cruciate ligament (ACL) can be successful. Primary ACL repair avoids invasive reconstruction techniques, graft-site morbidity, and the loss of native anatomy while producing excellent results in appropriately selected patients. Here we describe our patient selection parameters, ACL repair technique, and rehabilitation protocol.

Blood flow restriction (BFR) training with low weight is purported to induce similar physiological changes to high-weight regimens with the benefit of less tissue stress. We hypothesized that low-weight training with BFR would produce increased gains in strength and hypertrophy for muscle groups proximal, distal, and contralateral to tourniquet placement compared with low-weight training alone.In this prospective, randomized controlled trial, healthy subjects were randomized into a 6-week low-weight training program either with or without BFR on 1 extremity. Outcome measures included limb circumference and strength. Comparisons were made between the BFR and non-BFR extremities, BFR and control groups, and non-BFR extremity and control groups.A total of 24 subjects (14 BFR and 10 control subjects) completed the protocol. Significantly greater gains were observed in dynamometric strength both proximal (shoulder scaption [30% greater], flexion [23%], and abduction [22%]) and distal (grip strength [13%]) to the tourniquet in the BFR limb compared with both the non-BFR extremity and the control group (P.05). Arm and forearm circumferences significantly increased in the BFR limb compared with the non-BFR limb and control group (P = .01). The non-BFR extremity demonstrated greater grip strength than the control group (9%, P.01). No adverse events were reported.Low-weight BFR training provided a greater increase in strength and hypertrophy in the upper-extremity proximal and distal muscle groups compared with the control group. The non-BFR extremity showed a significant increase in grip strength compared with the control group, indicating a potential systemic effect.

Background: Graft-tunnel mismatch is an avoidable complication in anterior cruciate ligament (ACL) reconstruction. Patient height and sex may be predictors of patellar tendon length (PTL) and intra-articular ACL length (IAL). Understanding these relationships may assist in reducing graft-tunnel mismatch during ACL reconstruction with bone–patellar tendon–bone (BTB) autograft. Purpose: To determine the association of patient height and sex with PTL and IAL. Study Design: Cross-sectional study; Level of evidence, 3. Methods: Magnetic resonance imaging (MRI) studies were obtained on the healthy knees of 100 male and 100 female patients. Patients with prior surgery, open physes, significant degenerative changes, ACL rupture, or extensor mechanism injury were excluded. Three independent readers measured PTL, IAL, and Caton-Deschamps Index (CDI) on MRI. Bivariate and linear regression analysis was performed to detect the association of anthropometric data with anatomic parameters measured on MRI studies. Results: The mean age and body mass index were not significantly different between the male and female patients; however, male patients were significantly taller than female patients (1.75 vs 1.72 m, respectively; P < .001). There was a substantial agreement between the 3 readers for all parameters (κ > 0.75). Overall, female patients had significantly longer PTL (47.38 vs 43.92 mm), higher CDI (1.146 vs 1.071), and shorter IAL (33.05 vs 34.39 mm) ( P < .001 for all). Results of the linear regression analysis demonstrated that both height and female sex were predictive of longer PTL. Further, height was independently predictive of IAL but sex was not. Conclusion: PTL was correlated more with patient sex than height. IAL was also correlated with patient sex. Longer BTB grafts are expected to be harvested in female patients compared with male patients of the same height despite shorter IAL. These associations should be considered during BTB ACL reconstruction to minimize graft-tunnel mismatch.

Background:In response to the COVID-19 pandemic, many US health systems suspended elective surgery at the recommendation of the US Surgeon General. This dramatically decreased case volumes for orthopaedic sports medicine fellows at academic institutions.Purpose:To describe how the COVID-19 pandemic has affected the education of the sports medicine fellowship class of 2020 as well as the subsequent effects on their career plans and psychological well-being.Study Design:Cross-sectional study.Methods:A 33-item survey was distributed via email to all American Orthopaedic Society for Sports Medicine (AOSSM) 2020 fellow members on April 22, 2020. Frequencies are presented as raw totals and percentages of respondents. The Fisher exact test was used to determine statistical significance between nominal variables, with significance set at P < .05.Results:Of 210 registered fellows, 101 (48.1%) responded. Before the COVID-19 outbreak, the typical case volume per week for most fellows (47.5%) was 11 to 15 cases. From the enactment of COVID-19 mitigation policies to the date of survey completion, 90.1% of fellows had performed fewer than 20 cases. A total of 32 fellows were presented with redeployment options by their fellowship program, with 10 redeployed mandatorily to other hospital departments. Fellows reported that web-based didactics (n = 100) and web-based journal clubs (n = 72) were utilized as alternative supplements in the absence of clinical education. There were 8 respondents who had either their prior contract or job offer rescinded, while 1 had a signed contract voided. As a result, 6 fellows now plan to matriculate into a previously unplanned fellowship. Also, 10 respondents’ intended practice start date was being delayed by their employer. Respondents whose postfellowship plans were affected were statistically more likely to experience doubts about readiness for practice (58.8% vs 20.3%, respectively; P = .005), anxiety about future career plans (94.4% vs 63.8%, respectively; P = .01), anxiety about their financial situation (86.7% vs 50.8%, respectively; P = .018), stress in personal relationships (58.8% vs 29.9%, respectively; P = .045), and signs or symptoms of depression (41.2% vs 11.1%, respectively; P = .007) compared with those whose plans were not affected.Conclusion:This survey illustrates that during the early stages of the COVID-19 pandemic and the subsequent suspension of elective surgery, there have been downstream effects to this group’s education, careers, board certification timeline, and potentially their social and/or emotional well-being.

Injuries to the ulnar collateral ligament were previously career-ending injuries in high-level pitchers. Since Dr. Frank Jobe first performed ulnar collateral ligament reconstruction (UCLR) in 1974, there have been many variations of the technique which have allowed competitive athletes to return to play at a high level. Although UCLR has shown a high rate of return to play and athlete satisfaction, complications associated with diagnosis, the operation, and recovery can present unique challenges to the treating physician and are important to understand. Preoperative evaluation requires a thorough understanding of patient expectations and activity level. Intraoperative techniques should focus on proper tunnel placement and use of alternative fixation when bone stock is insufficient or complication occurs. Postoperative rehabilitation is important to allow complete graft maturation and return of pitching mechanics before complete return to play.