Increased Pitch Velocity Is Associated With Throwing Arm Kinetics, Injury Risk, and Ulnar Collateral Ligament Reconstruction in Adolescent, Collegiate, and Professional Baseball Pitchers: A Qualitative Systematic Review.

PURPOSE: To assess the relationship between pitch velocity and throwing arm kinetics, injury, and ulnar collateral ligament reconstruction (UCLr) among high school, collegiate, and professional baseball pitchers. METHODS: The Cochrane Database of Systematic Reviews, the Cochrane Central Register of Controlled Trials, PubMed (2008-2019), and OVID/MEDLINE (2008-2019) were queried for articles that reported on pitch velocity predicting throwing arm kinetics, injury, or UCLr. The Methodological Index for Non-randomized Studies checklist was used to evaluate the quality of all included studies. Descriptive statistics with ranges were used to quantify data where appropriate. RESULTS: A total of 24 studies examining 2,896 pitchers, with Level of Evidence II-V were included. Intergroup analysis noted pitch velocity was significantly correlated with elbow varus torque in high school (R2 = 0.36), collegiate (R2 = 0.29), and professional (R2 = 0.076) pitchers. Elbow distraction force was positively associated with ball velocity in interpitcher analyses of high school (R2 = 0.373), professional (R2 = 0.175), and mixed-cohort evaluations (R2 = 0.624). Intragroup analysis demonstrated a strong association between pitch velocity and elbow varus torque (R2 = 0.922-0.957) and elbow distraction force (R2 = 0.910) in professional pitchers. Faster ball velocity was positively associated with a history of throwing arm injury (R2 = 0.194) in nonadult pitchers. In 2 studies evaluating professionals, injured pitchers had faster pitch velocity before injury compared with uninjured controls (P = .014; P = .0354). The need for UCLr was positively correlated with pitch velocity (R2 = 0.036) in professional pitchers. The consequences of UCLr noted little to no decrease in pitch velocity. CONCLUSIONS: Professional baseball pitchers with faster pitch velocity may be at the greatest risk of elbow injury and subsequent UCLr, potentially through the mechanism of increased distractive forces on the medial elbow complex. When a pitcher ultimately undergoes UCLr, decreases in pitching performance are unlikely, but may occur, which should encourage pitchers to caution against maximizing pitch velocity. LEVEL OF EVIDENCE: Level IV, systematic review of Level II-IV studies.

Ergonomics Among Craniofacial Surgeons: A Survey of Work-Related Musculoskeletal Discomfort and Injury.

INTRODUCTION: Surgical procedures with loupe magnification, headlights, and microscopes expose craniofacial surgeons to mechanical stress that can increase risk of long-term musculoskeletal pain and injury. Identifying the prevalence and cause of work-related musculoskeletal discomfort may guide preventative strategies to prolong well-being, job satisfaction, and greater duration of surgical careers. METHODS: A 29-question online survey was distributed to the surgeon members of the American Cleft Palate-Craniofacial Association. Eight hundred seventy-three surveys were distributed, and the anonymous responses were recorded using Google forms. RESULTS: One hundred ninety-six unique responses were recorded (22.5% response rate). A total of 64.2% reported experiencing musculoskeletal symptoms during their career, with neck, lower back, and shoulders being the most common problem areas. Multivariate analysis demonstrated surgical loupes (odds ratio 2.36, P = 0.03) and length of surgical practice >15 years (odds ratio 1.95, P = 0.04) were independently associated with greater odds of developing symptoms. Headlights (median pain = 3, P < 0.001), loupes (median pain = 3.5, P < 0.001), and operative microscope use (median pain = 2, P = 0.02) were all associated with higher pain while operating. A total of 52.5% respondents sought medical treatments, 50.5% were concerned musculoskeletal discomfort would affect their careers, 56.6% reported a colleague that required an operation, and 30.2% reported a colleague on temporary or permanent disability. CONCLUSIONS: Craniofacial surgery often involves long procedures, use of surgical adjuncts, and ergonomically straining postures, which can lead to musculoskeletal discomfort and injury. This under-reported and important phenomenon merits candid conversation and active preventative strategies to prolong surgical careers, improve professional satisfaction, and maximize patient safety.