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Background: Saws are a common source of upper extremity injury. There have been several commercial and government-mandated safety mechanisms designed to reduce the number of saw injuries. We aim to assess the trends in the incidence and impact of saw-related upper extremity injuries over the last 2 decades.

Methods: The National Electronic Injury Surveillance System database was queried from January 2003 to December 2022 for upper extremity injuries caused by saws. Summary statistics for primary body part injured and diagnosis were calculated. Linear regression was performed to evaluate trends in the number of injuries over time.

Results: An estimated 1.38 million injuries (weighted) presenting to emergency departments were reported from January 2003 to December 2022. Patients had a mean age of 50.5 ± 18.1. Digits (82.2%) accounted for most injuries, followed by hands (11.9%). The lower arm (3.4%), wrist (1.66%), shoulder (0.3%), elbow (0.2%), and upper arm (0.2%) accounted for fewer injuries. There was a downtrend in number of saw injuries over the study period (R = 0.83, R2 = 0.69, p < .001). Subgroup analysis showed decreases in number of injuries to fingers (R = -0.82, R2 = 0.67, p < .001) and wrists (R = -0.61, R2 = 0.37, p = .004). The most common diagnoses were lacerations (69.7%), fractures (12.6%), and amputations (9.9%).

Conclusions: Upper extremity saw injuries have significantly decreased over the last 20 years. The fingers and hands account for the vast majority of saw injuries, resulting most commonly in lacerations, fractures, and amputations.

Level of evidence: IV.

Background: Traumatic digit amputation is a common injury with life-altering consequences for thousands of patients each year. In this study, we aim to update and expand the reported outcomes of return-to-work (RTW) and functional recovery in patients treated with digit replant after traumatic amputation.

Methods: A PRISMA-guided systematic review was performed to identify all published articles related to digit replantation following amputation. We queried the following 4 databases: Scopus, Embase, Web of Science, and PubMed-MEDLINE. A total of 31 studies were included in the analysis of return-to-work data.

Results: Of the 31 included studies, 26 studies reported that 1976 digits were successfully replanted, while 27 studies reported that 300 replants failed (86.8% success rate). Among 1087 patients in these studies, 82.9% who underwent replantation returned to work. The mean RTW time in 16 studies was 4.7 months (weighted average). Return-to-work time ranged from 0 to 26 months in 12 studies. Of 352 patients who returned to work in 17 studies, 90.9% resumed their previous occupation, while 29 (8.2%) changed occupations. The RTW for finger-only replantations was significantly lower compared to thumb-only, distal digit-only, and any digit replantations (66.0% vs 82.8%; 66.0% vs 87.6%; 66.0% vs 82.9%).

Conclusion: Despite a declining prevalence of digit replantation surgery in recent years, this study illustrates that replantation provides beneficial outcomes for patients with a high return-to-work rate.

Background: This study aims to evaluate the readability, quality, and reliability of online resources about peripheral nerve surgeries to determine if they meet recommended literacy standards.

Methods: We analyzed a total of 137 peripheral nerve surgery website by performing a Google search using the search terms "nerve transfer," "nerve repair," "nerve graft," "nerve decompression," "neurolysis," "targeted muscle reinnervation," "regenerative peripheral nerve interface," and "vascularized denervated muscle target." The reading level of the website text was assessed using Simple Measures of Gobbledygook, Flesch-Kincaid, and Gunning Fog. Quality was evaluated using the DISCERN Instrument. Reliability was determined using the Journal of American Medical Association Benchmark Criteria.

Results: All the websites exceeded the sixth-grade reading level, with median readability scores corresponding to a high school reading level or above. Conceptually harder peripheral nerve surgeries such as targeted muscle reinnervation and regenerative peripheral nerve interface websites were generally written at a significantly higher reading level than conceptually easier surgeries such as nerve repair and nerve graft. The median quality of the websites was rated as poor, and the median reliability of the websites was rated as low.

Conclusions: The findings indicate that the current peripheral nerve surgery websites texts do not adhere to recommended reading levels and are constructed with poor quality and low reliability. This potentially hinders patients understanding and utilization of peripheral nerve surgeries, suggesting a need for standardized guidelines to enhance the accessibility of medical information online.

Background: The purpose of this study was to evaluate differences in 90-day clinical outcomes between patients treated with generic volar locking plates (VLPs) and conventional VLPs in distal radius fractures. Secondary aims included assessing for differences in surgical characteristics and cost between the groups.

Methods: From November 2022 to April 2023, a prospective block-randomized study was undertaken in which surgeons alternated between using a generic VLP and a conventional VLP each month. The institution's chargemaster database was cross-referenced for implant cost. Primary outcomes were 90-day readmission, reoperation, and mortality rates. Secondary outcomes included estimated blood loss, tourniquet time, and implant cost.

Results: A total of 66 patients were included. Most were women (n = 61, 92.4%), with an average age of 61.0 ± 11.5 years. There were no significant differences in age, sex, smoking status, AO Foundation/Orthopaedic Trauma Association classification, or tourniquet time between patients who received generic and conventional implants. The average total cost was higher with conventional implants than generic implants($1348.61 ± 100.77 and $702.38 ± 47.83, respectively; P < .001). The largest difference in cost came from pegs and screws that were used ($640.77 ± 90.93 vs $268.47 ± 45.93, P < .001). No patients experienced complications such as readmission, reoperation, or death within 90 days.

Conclusions: Total implant cost was lower for procedures where generic VLPs were used. Cost differences between generic and conventional implants are driven by the variable selection of pegs and screws. With no differences in 90-day outcomes, surgeons may consider using generic implants as a way of increasing the value of care delivery.

Background: Uncertainty exists concerning the optimal utilization and effectiveness of pectoralis minor tenotomy (PMT) in neurogenic thoracic outlet syndrome (NTOS).

Methods: Between January 2020 and July 2023, 355 patients with NTOS underwent primary surgical treatment. Prospectively collected data were analyzed retrospectively.

Results: Overall mean patient age was 35.9 ± 1.9 years, 76% were female, and the Quick Disabilities of the Arm, Shoulder, and Hand (QuickDASH) score at presentation was 60.3 ± 3.2, reflecting substantial disability. Surgical treatment was based on localized tenderness/symptoms to palpation, with 322 (91%) undergoing combined supraclavicular decompression and PMT (SCD + PMT) and 33 (9%) selected for isolated PMT when findings were solely confined to the subcoracoid space. Mean operative time (29 ± 5 vs 164 ± 9 min, P < .01) and hospital stay (0.3 ± 0.1 vs 4.0 ± 0.2 days, P < .01) were both lower after isolated PMT, with no significant differences in postoperative complications or rehospitalization. During follow-up of 26.7 ± 1.5 months, QuickDASH scores declined by 41.2% ± 2.3% (P < .0001) and patient-rated outcomes were excellent in 34%, good in 41%, fair in 22%, and poor in 4%. Fewer patients had poor-rated outcomes after SCD + PMT (2%) than after isolated PMT (19%) (P < .01). Recurrent symptoms requiring supraclavicular reoperation occurred in 16 patients after SCD + PMT (5%) and in 5 patients after isolated PMT (15%) (P < .05).

Conclusions: Pectoralis minor tenotomy (PMT) has an important role in surgical treatment of NTOS, mainly as an adjunct in combination with SCD. While highly selected patients can do well after isolated PMT as a short outpatient procedure with rapid recovery, there is a greater potential for poor outcomes and supraclavicular reoperation than after SCD + PMT.

Background: Artificial intelligence offers opportunities to improve the burden of health care administrative tasks. Application of machine learning to coding and billing for clinic encounters may represent time- and cost-saving benefits with low risk to patient outcomes.

Methods: Gemini, a publicly available large language model chatbot, was queried with 139 de-identified patient encounters from a single surgeon and asked to provide the Current Procedural Terminology code based on the criteria for different encounter types. Percent agreement and Cohen's kappa coefficient were calculated.

Results: Gemini demonstrated 68% agreement for all encounter types, with a kappa coefficient of 0.586 corresponding to moderate interrater reliability. Agreement was highest for postoperative encounters (n = 43) with 98% agreement and lowest for new encounters (n = 27) with 48% agreement. Gemini recommended billing levels greater than the surgeon's billing level 31 times and lower billing levels 10 times, with 4 wrong encounter type codes.

Conclusions: A publicly available chatbot without specific programming for health care billing demonstrated moderate interrater reliability with a hand surgeon in billing clinic encounters. Future integration of artificial intelligence tools in physician workflow may improve the accuracy and speed of billing encounters and lower administrative costs.

Background: Generative artificial intelligence (AI) models have emerged as capable of producing human-like responses and have showcased their potential in general medical specialties. This study explores the performance of AI systems on the American Society for Surgery of the Hand (ASSH) Self-Assessment Exams (SAE).

Methods: ChatGPT 4.0 and Bing AI were evaluated on a set of multiple-choice questions drawn from the ASSH SAE online question bank spanning 5 years (2019-2023). Each system was evaluated with 999 questions. Images and video links were inserted into question prompts to allow for complete AI interpretation. The performance of both systems was standardized using the May 2023 version of ChatGPT 4.0 and Microsoft Bing AI, both of which had web browsing and image capabilities.

Results: ChatGPT 4.0 scored an average of 66.5% on the ASSH questions. Bing AI scored higher, with an average of 75.3%. Bing AI outperformed ChatGPT 4.0 by an average of 8.8%. As a benchmark, a minimum passing score of 50% was required for continuing medical education credit. Both ChatGPT 4.0 and Bing AI had poorer performance on video-type and image-type questions on analysis of variance testing. Responses from both models contained elements from sources such as PubMed, Journal of Hand Surgery, and American Academy of Orthopedic Surgeons.

Conclusions: ChatGPT 4.0 with browsing and Bing AI can both be anticipated to achieve passing scores on the ASSH SAE. Generative AI, with its ability to provide logical responses and literature citations, presents a convincing argument for use as an interactive learning aid and educational tool.

Background: Artificial intelligence (AI) is a promising tool to aid in diagnostic accuracy and patient communication. Prior literature has shown that ChatGPT answers medical questions and can accurately diagnose surgical conditions. The purpose of this study was to determine the accuracy of ChatGPT 4.0 in evaluating radiologic imaging of common orthopedic upper extremity bony pathologies, including identifying the imaging modality and diagnostic accuracy.

Methods: Diagnostic imaging was sourced from an open-source radiology database for 6 common upper extremity bony pathologies: distal radius fracture (DRF), metacarpal fracture (MFX), carpometacarpal osteoarthritis (CMC), humerus fracture (HFX), scaphoid fracture (SFX), and scaphoid nonunion (SN). X-ray, computed tomography (CT), and magnetic resonance imaging (MRI) modalities were included. Fifty images were randomly selected from each pathology where possible. Images were uploaded to ChatGPT 4.0 and queried for imaging modality, laterality, and diagnosis. Each image query was completed in a new ChatGPT search tab. Multinomial linear regression was used to identify variations in ChatGPT's diagnostic accuracy across imaging modalities and medical conditions.

Results: Overall, ChatGPT provided a diagnosis for 52% of images, with accuracy ranging from 0% to 55%. Diagnostic accuracy was significantly lower for SFX and MFX relative to HFX. ChatGPT was significantly less likely to provide a diagnosis for MRI relative to CT. Diagnostic accuracy ranged from 0% to 40% with regard to imaging modality (x-ray, CT, MRI) though this difference was not statistically significant.

Conclusions: ChatGPT's accuracy varied significantly between conditions and imaging modalities, though its iterative learning capabilities suggest potential for future diagnostic utility within hand surgery.

Background: Outcomes of interposition arthroplasty for treatment of elbow arthritis are highly dependent on elbow stability. The purpose of this study was to determine whether interposition arthroplasty with a novel bidirectional ligament reconstruction technique could adequately restore the static stability of the native elbow.

Methods: Static varus and valgus elbow stability was tested in 7 cadaver elbows with intact ligaments and capsule at 5 flexion angles (0°, 30°, 60°, 90°, and 120°). At each angle, the distance between fixed reference points across the elbow was measured both medially and laterally. The elbows were then destabilized and an interposition arthroplasty with ligament reconstruction was performed. Static elbow stability was reassessed by comparing postoperative deflection measurements with those of the native state. Graft slippage or loosening was visually assessed following testing.

Results: Interposition arthroplasty was performed in 7 cadaver specimens. Following ligament reconstruction, specimens reproduced the flexion angle-dependent static stability of native elbows to both varus and valgus stress. The greatest deflection changes between native elbows and elbows after interposition arthroplasty were 2.7% (P = .13) medially and 2.3% (P = .42) laterally, which were not significant. There was no loosening or slippage of either the interposition graft or the ligament reconstruction grafts.

Conclusions: Cadaveric elbow specimens underwent interposition arthroplasty with a novel technique for bidirectional ligament reconstruction. Static stability was maintained at varying degrees of elbow flexion, comparable to that of the native elbow. Interposition and ligament reconstruction grafts maintained secure fixation following static biomechanical testing.

Background: The treatment for Kienböck disease varies widely based on the status of the lunate. To date, there is no consensus regarding the optimal treatment for patients with coronal plane fractures of the lunate, or Lichtman Stage IIIC. Therefore, the purpose of this study was to assess whether coronal plane fractures of the lunate in Kienböck disease healed after surgical intervention, and to determine the outcomes after surgical fixation of the lunate compared with treatment with salvage procedures.

Methods: A retrospective review of 36 patients with Lichtman IIIC Kienböck disease was conducted. Patients were classified into lunate reconstruction (vascularized bone graft [VBG] or non-VBG) or salvage procedures (proximal row carpectomy [PRC] or limited fusion). Preoperative and postoperative visual analog scale (VAS) pain, range of motion, grip strength, and Mayo Wrist Score (MWS) were analyzed. Radiographs and computed tomographic scans were reviewed for Lichtman stage, fracture location, union, modified carpal height ratio, Stahl index, and radioscaphoid angle.

Results: Thirteen patients underwent lunate reconstruction, 13 underwent limited fusion, and 10 underwent PRC. The overall union rate was 45% after lunate reconstruction, with average time to union of 7 months. There were no differences in union rates between VBG and non-VBG. All 3 groups experienced improvement in their postoperative grip strength and MWS. There were no statistically significant differences in preoperative to postoperative changes in clinical outcome measures between the 3 cohorts; however, when we compared lunate reconstruction with all patients who underwent salvage procedures (limited carpal fusion and PRC), we noted the latter had improved functional outcomes (P = .019). Four patients (31%) in the reconstruction cohort and 2 patients (8%) in the limited carpal fusion group required reoperation at latest follow-up.

Conclusions: Union rate of coronal plane fractures in Kienböck disease remains variable. While the proportion of patients requiring reoperation was higher in the reconstruction group, all groups of patients experienced improvement in their clinical outcomes, without a significant difference between cohorts.