Performance of ChatGPT on the Plastic Surgery Inservice Training Examination.

BACKGROUND: Developed originally as a tool for resident self-evaluation, the Plastic Surgery Inservice Training Examination (PSITE) has become a standardized tool adopted by Plastic Surgery residency programs. The introduction of large language models (LLMs), such as ChatGPT (OpenAI, San Francisco, CA), has demonstrated the potential to help propel the field of Plastic Surgery. OBJECTIVES: The authors of this study wanted to assess whether or not ChatGPT could be utilized as a tool in resident education by assessing its accuracy on the PSITE. METHODS: Questions were obtained from the 2022 PSITE, which was present on the American Council of Academic Plastic Surgeons (ACAPS) website. Questions containing images or tables were carefully inspected and flagged before being inputted into ChatGPT. All responses by ChatGPT were qualified utilizing the properties of natural coherence. Responses that were found to be incorrect were divided into the following categories: logical, informational, or explicit fallacy. RESULTS: ChatGPT answered a total of 242 questions with an accuracy of 54.96%. The software incorporated logical reasoning in 88.8% of questions, internal information in 95.5% of questions, and external information in 92.1% of questions. When stratified by correct and incorrect responses, we determined that there was a statistically significant difference in ChatGPT's use of external information (P < .05). CONCLUSIONS: ChatGPT is a versatile tool that has the potential to impact resident education by providing general knowledge, clarifying information, providing case-based learning, and promoting evidence-based medicine. With advancements in LLM and artificial intelligence (AI), it is possible that ChatGPT may be an impactful tool for resident education within Plastic Surgery.

Single midline incision approach for decompression of greater, lesser and third occipital nerves in migraine surgery.

BACKGROUND: The traditional approach for occipital migraine surgery encompasses three separate surgical incisions in the posterior neck to decompress the greater occipital nerves (GON), lesser occipital nerves (LON), and third occipital nerves (TON). Other incisions have been investigated, including singular transverse incisions. We sought to evaluate a single, vertical midline incision approach for decompression of all six occipital nerves. METHODS: Using 10 cadaveric hemi-sides (5 fresh cadaver head and necks). Anatomic landmarks and the location of the bilateral GON, LON, and TON were marked according to previous anatomic studies. A single, midline 9-cm incision was made, and lateral skin flaps were raised to decompress or avulse all six nerves. RESULTS: Through the midline incision, the GON and TON were identified at 3.5 and 6.2 cm, respectively, inferior to a line bisecting the external auditory canal (EAC) and 1.5 cm lateral to the midline. The LON was identified as 6-cm inferior and 6.5-cm medial to a line bisecting the EAC in the plane just above the investing layer of the deep cervical fascia until the posterior border of the sternocleidomastoid was encountered. The LON had the greatest amount of variation but was identified lateral to the posterior border of the SCM. CONCLUSIONS: A single midline incision approach allows for successful identification and decompression of all six occipital nerves in migraine surgery.

Targeted Muscle Reinnervation in the Hand: An Anatomical Feasibility Study for Neuroma Treatment and Prevention.

PURPOSE: Targeted muscle reinnervation (TMR) has emerged as a treatment for, and prevention of, symptomatic neuromas and has been reported to be of benefit in the hand. Anatomical studies establishing landmarks for consistent identification of the motor entry points (MEPs) to the intrinsic muscles have not been performed. The purpose of this study was to provide details regarding the MEPs to the intrinsic muscles, determine which MEPs are identifiable dorsally, and develop recommended sensory to MEP nerve coaptations for prophylactic TMR at the time of ray amputation or for management of symptomatic neuromas. METHODS: Motor entry points to the intrinsic hand muscles were dissected in 5 fresh latex-injected cadavers. Number of MEPs, diameter, surface of entry, and distance from dorsal (Lister tubercle) and volar (hamate hook) landmarks were recorded for each target muscle. The digital sensory nerve diameters were measured for size comparison. RESULTS: Motor entry points were identified to all 19 intrinsic muscles through a volar approach and 12 through a dorsal approach. For all fingers, at least 2 MEPs were consistently identified dorsally at the base of each amputation site innervating expendable muscles. Motor entry points to the thenar muscles were only reliably identified through a volar approach. Two recommended nerve coaptations for each digit amputation were identified. All had a favorable sensory-to-MEP diameter ratio less than 2:1. CONCLUSIONS: The intrinsic hand muscles have MEPs at consistent distances from bony landmarks both dorsally and volarly. CLINICAL RELEVANCE: These results can be applied clinically to assist surgeons in identifying the locations of MEPs to the intrinsic muscles when performing TMR in the hand for both neuroma treatment and prevention.

Unique Complications of Venous Anastomotic Couplers: A Systematic Review of the Literature.

BACKGROUND: Anastomotic couplers expedite venous microvascular anastomoses and have been established as an equivalent alternative to hand-sewn anastomoses. However, complications unique to the coupler such as palpability and extrusion can occur. The purpose of this study was to perform a systematic review of the literature to assess complications distinct to the venous anastomotic coupler. METHODS: A Medline, PubMed, EBSCO host search of articles involving anastomotic venous couplers was performed. Studies involving arterial anastomotic couplers, end-to-side anastomoses, and reviews were excluded. Data points of interest were flap failure, venous thrombosis, hematoma, partial flap necrosis, infection, coupler extrusion, and coupler palpability. RESULTS: The search identified 165 articles; 41 of these met inclusion criteria. A total of 8,246 patients underwent 8,955 venous-coupled anastomoses. Combined reoperation rate was 3.3% and all-cause unsalvageable flap failure was 1.0%. Complications requiring reoperation included venous thrombosis (2.0%), hematoma (0.4%), partial flap necrosis (0.4%), and infection (0.3%). Eight patients had palpable couplers and 11 patients had extrusion of couplers (head/neck, hand, and feet) and required operative management. CONCLUSION: Venous couplers remain an equivalent alternative to conventional hand-sewn anastomosis. However, venous coupler extrusion and palpability in the late postoperative period is a complication unique to anastomotic couplers, particularly in radiated head and neck, feet and hand free flaps. Removing extruded venous couplers is safe after tissue integration 3 weeks postoperatively. Coupler palpability and extrusion should be integrated into preoperative patient counseling and assessed in follow-up examinations.

Salvage of Intraoral Dehiscence With a Superficial Temporal Artery Islandized Flap (STAIF).

Intraoral dehiscence compromises free fibula flaps following mandibular reconstruction. Salivary contamination risks thrombosis of microvascular anastomosis and hardware infection. The superficial temporal artery islandized flap (STAIF) provides a non-microsurgical reconstructive option for regaining intraoral competency for a time-sensitive complication. The STAIF is based on the superficial temporal artery coursing along the anterior hairline. The flap is mapped with the assistance of the Doppler probe. The width of the skin paddle is dependent upon the ability to close the donor site. The flap is taken down to the level of the zygomatic arch and tunneled into the mouth. We present a case of a patient who underwent mandibular reconstruction with a free fibula flap after a traumatic shotgun wound. The patient developed repeated intraoral dehiscence following failed local buccal and floor of mouth flaps leading to salivary contamination of the flap and hardware. The intraoral dehiscence was successfully salvaged on the third attempt with a STAIF. Intraoral dehiscence requires urgent attention to prevent loss of the free fibula flap after mandibular reconstruction. The STAIF is a non-microsurgical option for restoring intraoral competency. This robust, axially vascularized skin paddle may be split for intra- and extraoral coverage, as was performed in this case, and is an essential tool in the reconstructive armamentarium.

Treatment of Symptomatic Lymphedema in the Hand with Omental Flow-through Flap.

Vascularized lymph node transfer (VLNT) is a surgical option to improve physiologic lymphatic drainage. This technique transfers healthy vascularized lymphatic tissue from various available donor sites to the existing lymphatics of the affected area. Here, we present a successful case halting the size progression and reversing lymphedema symptoms in a patient treated with vascularized omental lymph node transfer. A 56-year-old man presented with stage III malignant sarcoma of his left medial upper arm. Two-years after excision, flap reconstruction, and radiation brachytherapy, worsening diffuse left arm edema developed, causing pain, decreased range of motion, and paresthesia. A vascularized omental lymph node transfer was performed. The omental flap required a flow-through design, requiring anastomosis of both gastroepiploic arteries to obtain Dopplerable signals. The patient experienced progressive relief of lymphedema symptoms after this transfer. Treatment outcomes with the use of VLNT have been largely encouraging; however, objective measures of improvement and timing of neolymphangiogenesis in recipient lymph node sites still need to be defined. Understanding omental VLNT flow dynamics and expected time point changes during the postoperative course will define expected outcomes and allow for treatment of a greater number of patients affected by lymphedema.

Correction: Autologous Muscle-Derived Nerve Wrap for Prevention of Symptomatic Microneuromas in Primary Nerve Repair.

[This corrects the article DOI: 10.7759/cureus.22513.].

Evaluation of Prepectoral Breast Tissue Expander Reconstruction Intraoperative Fill: Air or Saline?

SUMMARY: Staged implant-based breast reconstruction with immediate tissue expanders (TEs) is the most common method of breast reconstruction after mastectomy. TEs traditionally are filled with saline for expansion. Some surgeons have advocated initial intraoperative fill of the TE with air to avoid excess pressure on ischemic mastectomy skin flaps. The purpose of the study was to compare intraoperative air versus saline tissue fills. All patients who underwent prepectoral TE reconstruction after mastectomy from 2017 to 2019 were reviewed. The primary predictive variable was whether saline or air was used for initial tissue expansion. Outcome variables included mastectomy skin necrosis, nipple necrosis, infection, number of expansions, hematoma, and explantation. A total of 53 patients (88 TEs) were included in the study: 28 patients (44 TEs) who underwent initial intraoperative fill with air and 25 patients (44 TEs) who underwent an initial saline fill were assessed. There were no significant differences in complication rates between initial TE fill with saline versus air, including nipple necrosis, wound dehiscence, cellulitis, abscess, or TE removal ( P = 1.0). The number of postoperative TE fills in the initial air fill group was 3.2 compared to 2.7 in the initial saline fill group ( P = 0.27). Prepectoral TE initial fill with air has similar postoperative outcomes compared to initial saline fill. The authors found no benefit to initially filling prepectoral TEs with air intraoperatively. Given the additional effort of exchanging air for saline during the first postoperative fill, there was no clinical advantage of filling prepectoral TEs with air. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, III.

Applying GPT-4 to the Plastic Surgery Inservice Training Examination.

BACKGROUND: The recent introduction of Generative Pre-trained Transformer (GPT)-4 has demonstrated the potential to be a superior version of ChatGPT-3.5. According to many, GPT-4 is seen as a more reliable and creative version of GPT-3.5. OBJECTIVE: In conjugation with our prior manuscript, we wanted to determine if GPT-4 could be exploited as an instrument for plastic surgery graduate medical education by evaluating its performance on the Plastic Surgery Inservice Training Examination (PSITE). METHODS: Sample assessment questions from the 2022 PSITE were obtained from the American Council of Academic Plastic Surgeons website and manually inputted into GPT-4. Responses by GPT-4 were qualified using the properties of natural coherence. Incorrect answers were stratified into the consequent categories: informational, logical, or explicit fallacy. RESULTS: From a total of 242 questions, GPT-4 provided correct answers for 187, resulting in a 77.3% accuracy rate. Logical reasoning was utilized in 95.0% of questions, internal information in 98.3%, and external information in 97.5%. Upon separating the questions based on incorrect and correct responses, a statistically significant difference was identified in GPT-4's application of logical reasoning. CONCLUSION: GPT-4 has shown to be more accurate and reliable for plastic surgery resident education when compared to GPT-3.5. Users should look to utilize the tool to enhance their educational curriculum. Those who adopt the use of such models may be better equipped to deliver high-quality care to their patients.

Atasoy Flap Fingertip Reconstruction: Long-term Patient-reported Outcomes in Male Laborers.

Atasoy flaps (AFs) are commonly used to reconstruct digits after fingertip injuries. However, recent literature reports that some surgeons prefer skeletal shortening and closure, presumably because the procedure can be performed in the emergency department without the risk of flap-associated complications. The purpose of the present outcome study is to evaluate patient-reported, long-term satisfaction of AF reconstructions for fingertip injuries. Methods: Adult, male patients working in manual labor occupations who underwent AF reconstruction for fingertip injuries were identified from an institutional database. Patients were administered an injury-specific questionnaire relating to nail growth, function, aesthetics, cryalgia, and hypersensitivity. They were then administered the QuickDASH questionnaire to report standardized functional impairment and asked about their overall satisfaction with their reconstructed finger. Results: Twelve patients underwent AF fingertip reconstruction between 2015 and 2020. Eleven of these patients agreed to be interviewed, the majority having been treated in the emergency department setting. The overall satisfaction rate was 91% (n = 10). Common sequelae included hook nail 64% (n = 7), cold sensitivity 45% (n = 5), and hypersensitivity 27% (n = 3). There were no flap failures or tissue necrosis. One patient reported a second surgery for improvement of a hook nail deformity. Conclusions: Long-term outcomes of AF reconstruction for fingertip injuries demonstrate high overall satisfaction. Patients appreciated tissue salvage to preserve digit length, even in those unconcerned with aesthetics. Issues reported by patients, such as cold intolerance, hook nail, and decreased tactile sensation, are similar to other treatment options for fingertip injuries.

SPINE: An Initiative to Reduce Pressure Sore Recurrence.

The recurrence rate after pressure sore reconstruction remains high. Primary inciting factors can be organized into efforts aimed at wound prevention: spasticity relief, pressure off-loading, infection and contamination prevention, nutrition optimization, and maximizing extremity function. This article presents our detailed protocol, SPINE, to address each inciting factor with a summary of cases at our facility and review best practices from evidence-based medicine in the literature.

Autologous Muscle-Derived Nerve Wrap for Prevention of Symptomatic Microneuromas in Primary Nerve Repair.

Regeneration of peripheral nerves after repair is incomplete. Painful microneuromas may form at the site of an appropriately performed primary microsurgical nerve repair leading to a persistent Tinel's sign and hypersensitivity in that location. Here, we describe an autologous option using a free muscle-derived nerve wrap with the intent to capture axonal escape at the site of primary nerve coaptation. We demonstrate this technique on a patient undergoing primary nerve repair of a laceration to the superficial branch of the radial nerve using extensor digitorum communis muscle as a donor graft. This has become our preferred technique over commercially available nerve wraps as the muscle wrap is autologous, not limited by cost, and has the potential to limit microneuroma formation at the coaptation site.

Anterior Scalene Muscle Block Response Predicts Outcomes Following Thoracic Outlet Decompression.

BACKGROUND: There is no definitive objective measure for diagnosis of thoracic outlet syndrome (TOS), and functional capacity testing on standardized rehabilitation exercises before and after an anterior scalene muscle block (ASMB) has the potential to serve as a predictor of response to surgery and to improve diagnostic accuracy in these cases. METHODS: Patients evaluated for TOS underwent ASMB as a diagnostic test and were retrospectively reviewed. Functional capacity scores were recorded for patients performing repetitive motion exercises immediately before ASMB, 15 minutes after ASMB, and at a minimum of 6 weeks after thoracic outlet decompression (TOD). The primary outcome of interest was correlation between the pre- to post-ASMB difference and the pre-ASMB to postoperative difference with respect to 3 functional work capacity scores. RESULTS: The average change in time-to-fatigue and work product between pre- and post-ASMB of all exercises was an increase of 39.5% and 53.8%, respectively. The greatest pre-ASMB to post-TOD difference was seen for the Extremity Abduction Stress Test with an average improvement of 109.7% and 150.4% for time-to-fatigue and work product, respectively. The degree of percent improvement post-ASMB correlated positively with the degree of percent improvement post-TOD for all exercises with respect to work product and time-to-fatigue. CONCLUSIONS: Patient response to ASMB as measured by functional capacity on rehabilitation exercises predicted objective functional outcomes following TOD. Post-ASMB outcomes correlated with post-TOD outcomes. The ASMB can be used to assist in diagnosing TOS and provide a surrogate for expectation in patients considering undergoing neurogenic TOD.

Comparison of Breast Reconstruction Outcomes Using Oxychlorosene versus Triple Antibiotic Solution for Pocket Irrigation.

Background: Breast pocket irrigation with antiseptic solutions is performed to reduce contamination with breast implants. The optimal antiseptic irrigation solution and the efficacy of individual practices are unclear. Oxychlorosene sodium is frequently used at our institution. Oxychlorosene is bactericidal with a mechanism of action of oxidation and hypochlorination. The purpose of our study was to compare the outcomes of oxychlorosene sodium irrigation with triple antibiotic solution (TAS) in implant-based breast reconstruction. Methods: All patients who underwent implant-based reconstruction after mastectomy were reviewed. The primary predictive variable was type of solution used for pocket irrigation (TAS or oxychlorosene). Outcome variables included surgical site infection, device removal, and wound complications. Results: Between 2013 and 2018, 331 implant-based breast reconstructions were performed. Of these, 62% (n = 206) received oxychlorosene for surgical pocket irrigation (group I), and 38% (n = 125) received TAS (group II). Group I had an 11.7% (n = 24) 90-day surgical site infection rate, with 4.9% (n = 10) requiring oral antibiotics, 2.4% (n = 5) requiring intravenous antibiotics without device removal, and 4.4% (n = 9) requiring prosthetic removal. Group II had an 11.2% (n = 14) 90-day infection rate, with 5.6% (n = 7) requiring oral antibiotics, 2.4% (n = 3) requiring intravenous antibiotics without device removal, and 3.2% (n = 4) requiring removal (P = 0.90). When comparing the cost of oxychlorosene irrigation with TAS irrigation, oxychlorosene was less expensive. Conclusions: Oxychlorosene and TAS have similar surgical site infection rates in prosthetic breast reconstruction. Ease of preparation and cost make oxychlorosene a more favorable option for antibiotic irrigation in reconstructive breast surgery with prosthetic devices.

Necrotizing fasciitis secondary to lake water inoculation with Aeromonas sobria: A case report.

RATIONALE: Necrotizing fasciitis (NF) is a rapidly progressing bacterial soft tissue infection with a high mortality rate. It is characterized by significant soft tissue destruction with associated sepsis. The mainstay of treatment is coverage with appropriate broad-spectrum antibiotic therapy and emergent surgical debridement. PATIENT CONCERNS: A previously healthy 66-year-old female presented with a deep laceration to her right, posterior calf with subsequent contamination with lake water. After the wound was irrigated and closed, the patient developed NF. DIAGNOSIS: Laceration of the right lower extremity complicated by NF secondary to Aeromonas sobria. INTERVENTIONS: The patient underwent emergent surgical debridements with intravenous broad-spectrum antibiotics and negative pressure wound therapy. The lower extremity was reconstructed with split-thickness skin grafts. OUTCOMES: The patient's initial penetrating trauma was closed in the emergency room, and the patient was discharged home with antibiotics. She returned the next day with unstable vitals and was admitted to the intensive care unit. Her condition continued to deteriorate, and she underwent serial surgical debridements. Her condition improved and was discharged home after 13 days in the hospital. LESSONS LEARNED: Close monitoring for NF is important for tissue infections sustained in aquatic environments. Timely identification and surgical management of NF increases overall survival.

Sentinel Lymph Node Biopsy, Lymph Node Dissection, and Lymphedema Management Options in Melanoma.

Melanoma tumor thickness and ulceration are the strongest predictors of nodal spread. The recommendations for sentinel lymph node biopsy (SLNB) have been updated in recent American Joint Committee on Cancer and National Comprehensive Cancer Network guidelines to include tumor thickness ≥0.8 mm or any ulcerated melanoma. Mitotic rate is no longer considered an indicator for determining T category. Improvements in disease-specific survival conferred from SLNB were demonstrated through level I data in the Multicenter Selective Lymphadenectomy Trial (MSLT) I. The role for completion lymph node dissection has evolved to less surgery in lieu of recent domestic (MSLT II) and international (Dermatologic Cooperative Oncology Group Selective Lymphadenectomy Trial [DeCOG-SLT]) level I data having similar melanoma-specific survival. Treatment options for the prevention of treatment of lymphedema have progressed to include immediate lymphatic reconstruction, lymphovenous anastomosis, and vascularized lymph node transfer.