Faculty Bibliography

BACKGROUND:Over 500 000 carpal tunnel releases costing over $2 billion are performed each year in the United States. The study's purpose is to perform a cost-minimizing analysis to identify the least costly strategy for carpal tunnel syndrome treatment utilizing existing success rates based on previously reported literature. METHODS:We evaluate the expected cost of various treatment strategies based on the likelihood of further treatments: (1) a single steroid injection followed by surgical release; (2) up to 2 steroid injections before surgical release; (3) 3 steroid injections before surgery, and (4) immediate surgical release. To reflect costs, we use our institution's billing charges to private payers and reimbursements from Medicare. A range of expected steroid injection success rates are employed based on previously published literature. RESULTS:Immediate surgical release is the costliest treatment with an expected cost of $2149 to $9927 per patient. For immediate surgical release to cost less than a single injection attempt, the probability of surgery after injection would need to exceed 80% in the Medicare reimbursement model and 87% in the institutional billing model. A single steroid injection with subsequent surgery, if needed, amounts to a direct cost savings of $359 million annually compared with immediate surgical release. Three injections before surgery, with "high" expected success rates, represent the cost-minimizing scenario. CONCLUSIONS:Although many factors must be considered when deciding upon treatment for carpal tunnel syndrome, direct payer cost is an important component, and the initial management with steroid injections minimizes these direct payer costs.

Background  Open carpal tunnel release (CTR) is one of the most commonly performed operative procedures with operative duration being a primary metric of operating room efficiency. The purpose of this study was to identify factors associated with prolonged operative duration, in performing CTR. Materials and Methods  CTR cases performed by a single surgeon from September 2013 to October 2015 were reviewed. Patient age at the time of surgery, sex, location of surgery (specialty orthopaedic hospital versus ambulatory surgery center), body mass index (BMI), American Society of Anesthesiologists classification, total operative duration (TOD), and procedure time (PT) were recorded. Obesity was defined as BMI > 30 and morbid obesity was defined as BMI > 35. Data were analyzed to identify factors associated with prolonged TOD or PT. Results  One hundred and nine consecutive patients underwent isolated CTR. Mean age at time of surgery was 62 years (range: 24-92 years). Nonobese patients were found to have significantly shorter TOD than obese patients (22.3 vs. 24.4 minutes). Similarly, patients who were not morbidly obese had significantly shorter TOD than morbidly obese patients (22.6 vs. 26 minutes). No other factors were associated with prolonged TOD. No difference in PT was found between normal weight, obese, and morbidly obese groups. Conclusions  TOD, but not procedure time, is significantly affected by obesity. Our findings are relevant when scheduling and preparing obese patients for surgery, which may have a significant impact on health resource utilization. Level of Evidence  This is a Level III, economic/decision analysis study.

BACKGROUND:Health disparities exist among many patient populations, with race, payer status, hospital size and access to teaching versus non-teaching hospitals potentially affecting whether certain patients have access to the benefits of total wrist arthroplasty (TWA). METHODS:The National Inpatient Sample Database (NIS) was queried from 2001 to 2013 for TWA using the ICD-9 code 81.73. Patient-level data included age, sex, race, payer status, and year of discharge. Hospital-level data included hospital bed size, location, teaching status, and region. RESULTS:There were 1,213 patients identified who underwent TWA between 2001 and 2013. Total number of procedures decreased from 88 TWAs in 2001 to 65 in 2013. The yearly volume ranged from 33 in 2005 to 128 in 2007. The male-female ratio was 2.5 to 1. The majority of TWA procedures were performed at urban teaching hospitals (60.8%). CONCLUSIONS:The NIS database shows a downward trend of total wrist arthroplasty utilization. The majority of total wrist arthroplasties were performed at urban teaching hospitals indicating treatment occurs most often at academic centers of excellence.

CONTEXT/BACKGROUND:Major League Baseball (MLB) players are at risk of hook of hamate fractures. There is a paucity of data assessing the effect of a hook of hamate fracture on MLB players' future athletic performance. OBJECTIVE:To determine if MLB players who sustain hook of hamate fractures demonstrate decreased performance upon return to competition when compared with their performance before injury and that of their control-matched peers. DESIGN/METHODS:Retrospective Case-Control Design. SETTING/METHODS:Retrospective Database Study. PARTICIPANTS/METHODS:18 MLB players who sustained hook of hamate fractures. METHODS:Data for 18 MLB players with hook of hamate fractures incurred over 26 seasons (1989 to 2014) were obtained from injury reports, press releases, and player profiles ( www.mlb.com and www.baseballreference.com ). Player age, position, number of years in the league, mechanism of injury and treatment were recorded. Individual season statistics for the two seasons immediately prior to injury and the two seasons after injury for the main performance variable - wins above replacement (WAR) were obtained. Eighteen controls matched by player position, age, and performance statistics were identified. A performance comparison of the cohorts was performed. MAIN OUTCOME MEASURES/METHODS:Post-injury performance compared to pre-injury performance and matched-controls. RESULTS:Mean age at the time of injury was 25.1 years with a mean of 4.4 seasons of MLB experience prior to injury. All injuries were sustained to their nondominant batting hand. All players underwent operative intervention. There was no significant change in WAR or ISO when pre-injury and post-injury performance was compared. When compared with matched-controls, no significant decline in performance in WAR the first season and second season after injury was found. CONCLUSION/CONCLUSIONS:MLB players sustaining hook of hamate fractures can reasonably expect to return to their pre-injury performance levels following operative treatment.

BACKGROUND:Previous work evaluating the pronator quadratus (PQ) muscle following volar plate fixation (VPF) of distal radius fractures (DRF) suggests that PQ repair often fails in the postoperative period. The purpose of this investigation was to assess PQ repair integrity following VPF of DRF using dynamic musculoskeletal ultrasonography. METHODS:Twenty adult patients who underwent VPF of DRF with repair of the PQ with a minimum follow-up of 3 months underwent bilateral dynamic wrist ultrasonography. The integrity of the PQ repair, wrist range of motion (ROM) and strength, and functional outcome scores were assessed. RESULTS:Mean patient age at the time of surgery was 59 ± 14 years, and 50% underwent VPF of their dominant wrist. Patients were evaluated at a mean 9 ± 4 months after VPF. All patients had an intact PQ repair. The volar plate was completely covered by the PQ in 55% of patients and was associated with a larger PQ when compared to patients with an incompletely covered volar plate ( P = .026). The flexor pollicis longus tendon was in contact with the volar plate in 20% of patients, with those patients demonstrating a trend toward significantly increased wrist flexion ( P = .053). No difference in ROM, strength, or outcome scores was noted among wrists with completely or incompletely covered volar plates. CONCLUSIONS:The PQ demonstrates substantial durability after repair following VPF. Wrist ROM, strength, and functional outcomes are similar in wrists in which the volar plate is completely or incompletely covered by the repaired PQ.

The aim of this investigation was to examine graduating orthopedic resident case logs to evaluate trends in performing pediatric orthopedic procedures and compare pediatric orthopedic case volume among residents in the 90th, 50th, and 10th percentiles (by case volume) to identify caseload variation. Accreditation Council for Graduate Medical Education orthopedic resident case logs were examined for graduating years 2007-2013. Linear regression analyses were carried out to assess temporal trends in pediatric orthopedic case volume. Subgroup analyses were carried out to assess trends in cases by anatomic location. Comparisons of the number of pediatric cases performed by the 90th, 50th, and 10th percentiles of graduating residents were also performed. Pediatric orthopedic case volume increased significantly per graduating resident (295.9-373.2; P<0.001) from 2007 to 2013. Graduating residents in the 90th (494-573; P=0.001), 50th (264-334; P<0.001), and 10th (144-216; P=0.003) percentiles of case volume all sustained significant increases in the number of pediatric orthopedic cases performed. Subgroup analyses showed significant increases in pediatric orthopedic shoulder (4.8-7.3; P<0.001), humerus/elbow (25.9-32.7; P<0.001), forearm/wrist (28.6-40.4; P<0.001), hand/finger (15-16.9; P=0.005), femur/knee (44.5-51.9; P=0.002), leg/ankle (39.4-41.1; P=0.004), and spine case volume (24.9-33.6; P<0.001). On average, graduating residents in the 90th, 50th, and 10th percentiles performed 524, 302, and 169 cases, respectively. The current investigation shows significant growth in the number of pediatric orthopedic cases performed by graduating residents, particularly among upper extremity procedures. However, considerable variation in pediatric orthopedic case volume exists among residents. Although the educational effects of this case volume variation are incompletely understood, the current investigation may be beneficial in efforts to improve pediatric orthopedic educational quality.

Despite educational focus regarding orthopedic oncology during residency, assessment of resident orthopedic oncology caseload has not been performed. The purpose of this study was to evaluate orthopedic oncology caseload trends and variation among residents. The Accreditation Council for Graduate Medical Education case log reports for orthopedic surgery residents were reviewed for graduating years 2007 to 2013. Trends in orthopedic oncology cases and variation in the median number of cases performed by residents in the 90th, 50th, and 10th percentiles of caseload were evaluated. The proportion of orthopedic oncology caseload among all cases performed by residents increased significantly (P = 0.005) from 2007 to 2013. Likewise, the mean number of adult (P = 0.002), pediatric (P = 0.003), and total orthopedic oncology cases increased significantly (P = 0.002). On average, residents in the 90th, 50th, and 10th percentiles performed 83, 28, and 3 cases, respectively. The current study demonstrates a significant increase in adult, pediatric, and total orthopedic oncology caseload. There is also evidence of substantial caseload variation among residents. Caseload variation may influence the education and technical proficiency of orthopedic residents.

BACKGROUND:Forearm immobilization techniques are commonly used to manage distal radius, scaphoid, and metacarpal fractures. The purpose of our study was to compare the degree of rotational immobilization provided by a sugar-tong splint (STS), short arm cast (SAC), Munster cast (MC), and long arm cast (LAC) at the level of the distal radioulnar joint (DRUJ), carpus, and metacarpals. METHODS:Seven cadaveric upper extremity specimens were mounted to a custom jig with the ulnohumeral joint fixated in 90° of flexion. Supination and pronation were unrestricted. K-wires were placed in the distal radius, scaphoid, and metacarpals using fluoroscopic guidance to measure the total arc of rotation referenced to the ulnar ex-fix pin. Baseline measurements followed by sequential immobilization with well-molded STS, SAC, MC, and LAC were obtained with 1.25, 2.5, and 3.75 ft-lb of supination and pronation force directed through the metacarpal K-wire. Each condition was tested 3 times. Digital photographs were taken perpendicular to the ulnar axis to analyze the total arc of motion. RESULTS:The most effective constructs from least to greatest allowed rotational arcs were LAC, MC, SAC, and STS. Above-elbow constructs (MC, LAC) demonstrated superior immobilization compared with below-elbow constructs (SAC) ( P < .001). Circumferential constructs (SAC, MC, LAC) were superior to the noncircumferential construct (STS) ( P < .001). There were no significant differences between the MC and LAC in all conditions tested. CONCLUSIONS:Both circumferential and proximally extended immobilization independently improved rotational control of the wrist. However, extending immobilization proximal to the epicondyles did not confer additional stability.

Radial shaft convergence in distal radius fractures is often misdiagnosed. This common deformation is often associated with a radial translation of the distal fragment. This parameter has to be corrected because of the increased risk of distal radioulnar joint instability due to detensioning of the distal interosseous membrane if there is an associated triangular fibrocartilage complex lesion. A new radiologic sign for diagnosis of proximal radius convergence during distal radius fracture is presented as well as technical tips for correction of this deformity.

Flexor tendon injuries of the hand are uncommon, and they are among the most challenging orthopaedic injuries to manage. Proper management is essential to ensure optimal outcomes. Consistent, successful management of flexor tendon injuries relies on understanding the anatomy, characteristics and repair of tendons in the different zones, potential complications, rehabilitation protocols, recent advances in treatment, and future directions, including tissue engineering and biologic modification of the repair site.