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American Journal of Sports Medicine

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https://read.qxmd.com/read/30897340/performance-and-return-to-sport-after-latissimus-dorsi-and-teres-major-tears-among-professional-baseball-pitchers
#1
Brandon J Erickson, Peter N Chalmers, John D'Angelo, Kevin Ma, Anthony A Romeo
BACKGROUND: Latissimus dorsi and teres major (LD/TM) tears are becoming an increasingly common cause of injury and disability among professional baseball pitchers. PURPOSE/HYPOTHESIS: To determine performance and return to sport (RTS) among professional baseball pitchers after LD/TM tears treated operatively and nonoperatively and to compare the RTS rate and performance between pitchers who sustained an LD/TM tear and matched controls. The authors hypothesized a high RTS rate among professional baseball pitchers after LD/TM tears, with no significant difference in RTS rate or performance between cases and controls for operative and nonoperative treatment-specifically, in the primary performance outcome variables of WHIP ([walks + hits] / innings pitched), fielding independent pitching, and wins above replacement...
March 21, 2019: American Journal of Sports Medicine
https://read.qxmd.com/read/30897337/side-of-hamstring-harvest-does-not-affect-performance-return-to-sport-rate-or-future-hamstring-injuries-after-ulnar-collateral-ligament-reconstruction-among-professional-baseball-pitchers
#2
Brandon J Erickson, Peter N Chalmers, John D'Angelo, Kevin Ma, Christopher S Ahmad, Joshua S Dines, Anthony A Romeo
BACKGROUND: Ulnar collateral ligament reconstruction (UCLR) is a successful procedure among professional baseball pitchers. It is unclear if hamstring tendon harvest side for UCLR affects the outcome or alters the risk for subsequent hamstring injury. HYPOTHESIS: Players with prior UCLR with ipsilateral (drive leg) hamstring autograft will have the same return-to-sport (RTS) rate and performance upon RTS but a higher number of subsequent lower extremity injuries than those with contralateral (landing leg) hamstring autograft...
March 21, 2019: American Journal of Sports Medicine
https://read.qxmd.com/read/30897004/biomechanical-comparison-of-vertical-mattress-and-cross-stitch-suture-techniques-and-single-and-double-row-configurations-for-the-treatment-of-bucket-handle-medial-meniscal-tears
#3
Gilberto Y Nakama, Camilla C Kaleka, Carlos E Franciozi, Diego C Astur, Pedro Debieux, Joseph J Krob, Zachary S Aman, Bryson R Kemler, Hunter W Storaci, Grant J Dornan, Moises Cohen, Robert F LaPrade
BACKGROUND: Given the variety of suturing techniques for bucket-handle meniscal repair, it is important to assess which suturing technique best restores native biomechanics. PURPOSE/HYPOTHESIS: To biomechanically compare vertical mattress and cross-stitch suture techniques, in single- and double-row configurations, in their ability to restore native knee kinematics in a bucket-handle medial meniscal tear model. The hypothesis was that there would be no difference between the vertical mattress and cross-stitch double-row suture techniques but that the double-row technique would provide significantly improved biomechanical parameters versus the single-row technique...
March 21, 2019: American Journal of Sports Medicine
https://read.qxmd.com/read/30896980/tibial-slope-and-its-effect-on-graft-force-in-posterior-cruciate-ligament-reconstructions
#4
Andrew S Bernhardson, Zachary S Aman, Nicholas N DePhillipo, Grant J Dornan, Hunter W Storaci, Alex W Brady, Gilberto Nakama, Robert F LaPrade
BACKGROUND: A flattened posterior tibial slope may cause excessive unwanted stress on the posterior cruciate ligament (PCL) reconstruction graft and place patients at risk for PCL reconstruction graft failure. To date, there is a paucity of biomechanical studies evaluating the effect of posterior tibial slope on the loading properties of single-bundle (SB) and double-bundle (DB) PCL grafts. PURPOSE/HYPOTHESIS: The purpose of this study was to quantify the effect of sagittal plane tibial slope on PCL reconstruction graft force at varying slopes and knee flexion angles for SB and DB PCL reconstructions...
March 21, 2019: American Journal of Sports Medicine
https://read.qxmd.com/read/30896976/comparison-of-standard-and-right-left-international-knee-documentation-committee-subjective-knee-form-scores
#5
Justin A Magnuson, Greg Strnad, Clair Smith, Morgan H Jones, Paul Saluan, James J Irrgang, Kurt P Spindler
BACKGROUND: The International Knee Documentation Committee Subjective Knee Form (IKDC-SKF) is a validated patient-reported outcome used in clinical research. No studies exist directly comparing the standard unilateral adult version (IKDC-SKF) with the bilateral adult version (R/L IKDC-SKF). HYPOTHESES: The first hypothesis is that no clinically relevant difference would be observed between standard IKDC-SKF scores and involved R/L scores. The second hypothesis is that a relevant difference would be observed between involved and uninvolved scores on the R/L IKDC-SKF...
March 21, 2019: American Journal of Sports Medicine
https://read.qxmd.com/read/30896975/comparison-of-outcomes-based-on-graft-type-and-tunnel-configuration-for-primary-ulnar-collateral-ligament-reconstruction-in-professional-baseball-pitchers
#6
Timothy B Griffith, Christopher S Ahmad, Prakash Gorroochurn, John D'Angelo, Michael G Ciccotti, Joshua S Dines, David W Altchek, Christopher L Camp
BACKGROUND: Professional baseball pitchers are at high risk for tears of the ulnar collateral ligament (UCL) of the elbow, often requiring surgical reconstruction. Despite acceptable published return-to-play outcomes, multiple techniques and graft types have been described. PURPOSE: This study compares UCL reconstruction (UCLR) outcomes based on tunnel configuration and graft type. STUDY DESIGN: Cohort study; Level of evidence, 3. METHODS: After approval from our institutional review board and Major League Baseball (MLB), 566 professional baseball pitchers who underwent UCLR between 2010 and 2014 were identified and included...
March 21, 2019: American Journal of Sports Medicine
https://read.qxmd.com/read/30896969/variations-in-blood-supply-from-proximal-to-distal-in-the-ulnar-collateral-ligament-of-the-elbow-a-qualitative-descriptive-cadaveric-study
#7
Patrick S Buckley, Elizabeth R Morris, Colin M Robbins, Bryson R Kemler, Salvatore J Frangiamore, Michael G Ciccotti, Johnny Huard, Robert F LaPrade, Thomas R Hackett
BACKGROUND: The vascular supply of the ulnar collateral ligament (UCL) is unknown. Previous studies reported varying success in return-to-play rates after nonoperative management of partial UCL tears and suggested a varying healing capacity as possibly related to the location of the UCL injury. PURPOSE: To analyze the macroscopic vascular anatomy of the UCL of the elbow. STUDY DESIGN: Descriptive laboratory study. METHODS: Eighteen fresh-frozen male cadaveric elbows from 9 donors were sharply dissected 15 cm proximal to the medial epicondyle...
March 21, 2019: American Journal of Sports Medicine
https://read.qxmd.com/read/30888847/effects-of-aspirin-on-growth-factor-release-from-freshly-isolated-leukocyte-rich-platelet-rich-plasma-in-healthy-men-a-prospective-fixed-sequence-controlled-laboratory-study
#8
Prathap Jayaram, Peter Yeh, Shiv J Patel, Racel Cela, Theodore B Shybut, Matthew W Grol, Brendan H Lee
BACKGROUND: The benefits of platelet-rich plasma (PRP) are believed to be in part dependent on growth factor release after platelet activation. Platelet activation is complex and involves multiple mechanisms. One important mechanism is driven by cyclooxygenase 1 (COX-1)-mediated conversion of arachidonic acid (AA) to precursor prostaglandins that then mediate proinflammatory responses that trigger growth factor release. Acetylsalicylic acid (ASA; also known as aspirin) is known to irreversibly inhibit COX-1, thereby blocking AA-mediated signaling; however, it is unclear whether ASA use alters growth factor release from freshly isolated PRP...
March 19, 2019: American Journal of Sports Medicine
https://read.qxmd.com/read/30883189/epidemiology-of-shoulder-surgery-among-professional-baseball-players
#9
Peter N Chalmers, Brandon J Erickson, John D'Angelo, Kevin Ma, Anthony A Romeo
BACKGROUND: Injuries remain a significant problem for professional baseball players. There is little information regarding the incidence and outcomes of shoulder surgical procedures among these athletes. PURPOSE/HYPOTHESIS: To report the incidence, pathology, procedure type, demographics, and return-to-sport (RTS) rate of shoulder surgery among Major League Baseball (MLB) players. Most shoulder procedures would be performed on pitchers with a history of injury; the labrum would be the most commonly involved; and that the RTS rate would be >50%...
March 18, 2019: American Journal of Sports Medicine
https://read.qxmd.com/read/30883186/prospective-evaluation-of-the-patient-acceptable-symptom-state-to-identify-clinically-successful-anterior-cruciate-ligament-reconstruction
#10
José F Vega, Cale A Jacobs, Gregory J Strnad, Lutul Farrow, Morgan H Jones, Anthony Miniaci, Richard D Parker, James Rosneck, Paul Saluan, James S Williams, Kurt P Spindler
BACKGROUND: The length of most patient-reported outcome measures creates significant response burden, which hampers follow-up rates. The Patient Acceptable Symptom State (PASS) is a single-item, patient-reported outcome measure that asks patients to consider all aspects of life to determine whether the state of their joint is satisfactory; this measure may be viable for tracking outcomes on a large scale. HYPOTHESIS: The PASS question would identify clinically successful anterior cruciate ligament reconstruction (ACLR) at 1-year follow-up with high sensitivity and moderate specificity...
March 18, 2019: American Journal of Sports Medicine
https://read.qxmd.com/read/30883185/performance-and-return-to-sport-after-ulnar-nerve-decompression-transposition-among-professional-baseball-players
#11
Brandon J Erickson, Peter N Chalmers, John D'Angelo, Kevin Ma, Anthony A Romeo
BACKGROUND: Isolated ulnar nerve decompression/transposition is an uncommon surgical procedure among professional baseball players. PURPOSE/HYPOTHESIS: To determine performance and rate of return to sport (RTS) among professional baseball players after isolated ulnar nerve decompression/transposition, including those who required decompression/transposition after ulnar collateral ligament reconstruction (UCLR), and to compare outcomes between cases and matched controls...
March 18, 2019: American Journal of Sports Medicine
https://read.qxmd.com/read/30883182/long-term-prospective-multicenter-study-of-isolated-bankart-repair-for-a-patient-selection-method-based-on-the-instability-severity-index-score
#12
Hervé Thomazeau, Tristan Langlais, Alexandre Hardy, Jonathan Curado, Olivier Herisson, Jordane Mouton, Christophe Charousset, Olivier Courage, Geoffroy Nourissat
BACKGROUND: An isolated arthroscopic Bankart repair carries a high mid- and long-term risk of recurring instability. Preoperative patient selection based on the Instability Severity Index Score should improve outcomes. PURPOSE: To report the overall long-term recurrence rate for isolated Bankart repair, investigate the predictive factors for recurrence, analyze time to recurrence, and determine a quantitative cutoff point for recurrence in terms of Instability Severity Index Score...
March 18, 2019: American Journal of Sports Medicine
https://read.qxmd.com/read/30865844/return-to-sport-as-an-outcome-measure-for-shoulder-instability-surprising-findings-in-nonoperative-management-in-a-high-school-athlete-population
#13
Ellen Shanley, Charles Thigpen, John Brooks, Richard J Hawkins, Amit Moyama, Adam Kwapisz, Michael J Kissenberth, John M Tokish
BACKGROUND: Young age and contact sports have been postulated as risk factors for anterior shoulder instability. Management after shoulder instability is controversial, with studies suggesting that nonoperative management increases the risk of recurrence. Several studies examined return to play after an in-season instability episode, and few followed these patients to determine if they were able to successfully compete in a subsequent season. No study has evaluated this question in a high school athlete population...
March 13, 2019: American Journal of Sports Medicine
https://read.qxmd.com/read/30865838/the-role-of-anterior-capsular-laxity-in-hip-microinstability-a-novel-biomechanical-model
#14
Adam M Johannsen, Anthony W Behn, Kotaro Shibata, Leandro Ejnisman, Timothy Thio, Marc R Safran
BACKGROUND: Hip microinstability is an increasingly recognized source of hip pain and disability. Although the clinical entity has been well described, the pathomechanics of this disease remain poorly understood. PURPOSE/HYPOTHESIS: The purpose of this study was to determine the role of capsular laxity in atraumatic hip microinstability. Our hypothesis was that cyclic stretching of the anterior hip capsule would result in increased hip range of motion and femoral head displacement...
March 13, 2019: American Journal of Sports Medicine
https://read.qxmd.com/read/30855979/return-to-sport-after-arthroscopic-rotator-cuff-repair-is-there-a-difference-between-the-recreational-and-the-competitive-athlete
#15
Burak Altintas, Nicole Anderson, Grant J Dornan, Robert E Boykin, Catherine Logan, Peter J Millett
BACKGROUND: Return to sport (RTS) remains an important challenge and measure of success for athletes undergoing arthroscopic rotator cuff repair (RCR). PURPOSE: To determine the rate of RTS after RCR and to analyze predictive factors associated with a lower rate of return. STUDY DESIGN: Systematic review and meta-analysis. METHODS: A systematic review of the literature was performed following the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines...
March 11, 2019: American Journal of Sports Medicine
https://read.qxmd.com/read/30848659/cellular-components-and-growth-factor-content-of-platelet-rich-plasma-with-a-customizable-commercial-system
#16
Michael Baria, W Kelton Vasileff, Meghan Miller, James Borchers, David C Flanigan, Sushmitha S Durgam
BACKGROUND: Platelet-rich plasma (PRP) is an autologous orthobiologic treatment option for musculoskeletal conditions with favorable results in a limited number of high-quality clinical trials. Because different blood-processing methods result in PRP with varying cellular and growth factor content, it is critical that clinicians understand the content of the specific PRP being used in clinical practice. One adjustable system, the Angel System, has few independent laboratory reports on the specific composition of its PRP...
March 8, 2019: American Journal of Sports Medicine
https://read.qxmd.com/read/30844295/are-amniotic-fluid-products-stem-cell-therapies-a-study-of-amniotic-fluid-preparations-for-mesenchymal-stem-cells-with-bone-marrow-comparison
#17
Alberto J Panero, Alan M Hirahara, Wyatt J Andersen, Joshua Rothenberg, Fernando Fierro
BACKGROUND: In vivo amniotic fluid is known to contain a population of mesenchymal stem cells (MSCs) and growth factors and has been shown to assist in healing when used as an adjunct in procedures across multiple medical specialties. It is unclear whether amniotic fluid products (AFPs) contain MSCs and, if so, whether the cells remain viable after processing. PURPOSE: To determine whether MSCs, growth factors, and hyaluronan are present in commercially available AFPs...
March 7, 2019: American Journal of Sports Medicine
https://read.qxmd.com/read/30840831/leucocyte-rich-platelet-rich-plasma-treatment-of-gluteus-medius-and-minimus-tendinopathy-a-double-blind-randomized-controlled-trial-with-2-year-follow-up
#18
Jane Fitzpatrick, Max K Bulsara, John O'Donnell, Ming Hao Zheng
BACKGROUND: A previously published trial showed that patients with chronic gluteal tendinopathy achieved greater clinical improvement at 12 weeks when treated with a single platelet-rich plasma (PRP) injection than those treated with a single corticosteroid injection (CSI). PURPOSE: This follow-up study was conducted to determine whether there would be a sustained long-term difference in the modified Harris Hip Score (mHHS) at 2 years for a leucocyte-rich PRP (LR-PRP) injection in the treatment of chronic gluteal tendinopathy...
March 6, 2019: American Journal of Sports Medicine
https://read.qxmd.com/read/30835150/midshaft-clavicle-fractures-surgery-provides-better-results-as-compared-with-nonoperative-treatment-a-meta-analysis
#19
Enrico Guerra, Davide Previtali, Simone Tamborini, Giuseppe Filardo, Stefano Zaffagnini, Christian Candrian
BACKGROUND: There is no agreement on the best treatment for displaced midshaft clavicle fractures (MCFs), which are currently addressed by nonoperative or surgical approaches. PURPOSE: The aim of this meta-analysis was to compare fracture healing and functional outcome after surgical versus nonsurgical treatment of MCFs, to help specialists in deciding between these different strategies by providing a synthesis of the best literature evidence. STUDY DESIGN: Meta-analysis...
March 5, 2019: American Journal of Sports Medicine
https://read.qxmd.com/read/30802147/evaluation-of-an-in-ear-sensor-for-quantifying-head-impacts-in-youth-soccer
#20
Stian Bahr Sandmo, Andrew S McIntosh, Thor Einar Andersen, Inga Katharina Koerte, Roald Bahr
BACKGROUND: Wearable sensor systems have the potential to quantify head kinematic responses of head impacts in soccer. However, on-field use of sensors (eg, accelerometers) remains challenging, owing to poor coupling to the head and difficulties discriminating low-severity direct head impacts from inertial loading of the head from human movements, such as jumping and landing. PURPOSE: To test the validity of an in-ear sensor for quantifying head impacts in youth soccer...
February 25, 2019: American Journal of Sports Medicine
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