Journal of reconstructive microsurgery最新文献

The thoracodorsal artery perforator (TDAP) flap is a versatile pedicled and free flap with low donor site morbidity and a relatively thin skin paddle. Physical patient characteristics may influence interindividual differences in perforator characteristics and, therefore, help to estimate the safety of the TDAP flap.Dynamic infrared thermography and color duplex ultrasound were applied to assess the TDAP diameter, peak systolic velocity (PSV), end-diastolic velocity, resistance index, and thickness of the latissimus dorsi muscle and the subcutaneous tissue bilaterally in 25 subjects. The effect of handedness on the symmetry of perforator characteristics was investigated.Perforator properties were not significantly altered by sex or body mass index. The mean latissimus dorsi muscle thickness correlated positively with both the perforator diameter (Pearson's r = 0.25, p = 0.0048, n = 124) and the PSV (r = 0.29, p = 0.0012, n = 124). In contrast, a negative correlation was observed between subcutaneous tissue thickness and PSV (r = -0.31, p = 0.0003, n = 124). A comparison of the perforator diameter and the PSV in the dominant and nondominant sides showed no statistically significant difference.The findings of the study indicate that perfusion of the thoracodorsal artery flap is enhanced by the presence of a thicker latissimus dorsi muscle, a thinner subcutaneous tissue, and a reduced quantity of TDAPs.

Despite major advancements in lymphatic care, there remains a lack of consensus across institutions regarding the evaluation and surgical management of lymphedema. The aim of this study is to describe the practices for diagnosis and surgical treatment of lymphedema across accredited Lymphatic Education & Research Network (LE&RN) comprehensive Centers of Excellence (COEs).A survey was distributed to directors of the 16 LE&RN comprehensive COEs in January 2023. Directors were queried on lymphatic surgeon training, evaluation of potential surgical patients, description of surgical operations offered at their center, surgical algorithms, and operative techniques for various procedures.Nine COEs completed the survey (56% response rate). Eight of nine centers reported having an interdisciplinary surgical evaluation program, including lymphatic surgery (100%, 8/8), certified lymphedema therapy (100%, 8/8), and lymphatic medicine (75%, 6/8). COEs use a variety of lymphatic imaging modalities, with indocyanine green lymphography (89%, 8/9) and lymphoscintigraphy (78%, 7/9) being the most common. While all COEs offered debulking procedures, 67% (6/9) offered physiologic procedures (lymphovenous bypass and vascularized lymph node transplant), and 56% (5/9) offered immediate lymphatic reconstruction. There was no consensus on surgical algorithms or operative approaches.LE&RN comprehensive COEs consistently use multidisciplinary care teams for medical and surgical evaluations, but there is significant variability in lymphatic imaging modalities used and lymphatic surgery types and techniques. These findings underscore the need for continued research and standardization of lymphatic surgery outcomes to develop consensus.

This study evaluates the influence and longevity of a microsurgery course on the future careers of medical students over a period of up to 10 years. The course, which has been well-established for over 15 years, aimed to impart fundamental microsurgical skills through practical exercises using nonbiological and biological models.This study was conducted as an anonymous online cross-sectional survey. Only students who have completed a microsurgical training course at our department within a 10 years period between 2013 and 2023 were eligible for this online survey. This survey aimed to analyze the subjective microsurgical skills at the time of the survey and the influence of the course on further career decisions and development.A total of 300 former participants were eligible and 120 answered the survey. Key findings showed that 99.2% of participants rated the course content and the balance of practice to theory as appropriate, with 100% feeling confident in their microsurgical suturing abilities post-course. A significant 87.5% felt competent to perform vascular anastomoses, though only 63.9% felt confident about nerve coaptation. Statistical analysis indicated no significant gender differences in course evaluations, though some differences were noted between semester-accompanying and block course participants. In the survey, 54.2% of respondents reported using their microsurgical skills in their subsequent medical careers, and 50.4% indicated that the course influenced their medical specialization choices.The study concludes that early exposure to microsurgical training can significantly impact students' skills and career trajectories, supporting the integration of such courses into medical education curricula to enhance surgical training and professional development.

Midface reconstruction should address both functional and cosmetic aspects. The vascularized fibular osteomyocutaneous flap (VFOF) is a promising first choice because of its numerous advantages in this type of reconstruction.This study aimed to investigate the causes of VFOF failure during midface reconstruction. We retrospectively reviewed patients who underwent midface defect reconstruction using VFOF from August 2011 to May 2022 at a single center. The primary outcome variable was VFOF loss within 30 days, and secondary outcomes included late complications related to VFOF occurring at least 6 months postoperatively.A total of 62 patients underwent VFOF reconstruction for midface defects. The VFOF technique was primarily used in 56 (90.3%) patients for initial reconstruction. according to the Brown and Shaw classification, most reconstructions were performed for Class III (77.4%) and Class b (83.6%) defects. Skin paddles of the VFOF were used in 51 (82.3%) patients, and a double flap technique utilizing the fibular was employed in 24 (38.7%) patients. VFOF failure occurred in 10 (16.1%) patients. Prognostic factors associated with VFOF failure included sex (p = 0.01) and maxillary Brown and Shaw classification (horizontal; p = 0.01). Long-term follow-up of 47 patients revealed late complications in 11 (23.4%) patients, and diabetes mellitus was identified as a significant risk factor (p < 0.01).The VFOF is suitable for midface defect reconstruction; however, proper placement of the fibular bone, avoiding pedicle vessel kinking, ensuring tension-free vascular anastomosis during surgery, considering the use of an additional flap in addition to the fibula flap for large defects, and diligent postoperative nasal care are essential.

The deep inferior epigastric perforator (DIEP) flap is considered the gold standard for autologous breast reconstruction (ABR). Less commonly used abdominal flaps include the superficial inferior epigastric artery (SIEA) and the superficial circumflex iliac artery (SCIA) flaps which are based on the superficial vasculature of the abdominal wall. We sought to compare complication rates between DIEP and superficial system flaps and their associated risk factors.A retrospective chart review of 400 breast cancer patients undergoing abdominally-based free flap breast reconstruction with either a DIEP or superficial flap from January 2017 to December 2023 was performed at a single institution. The primary outcome was breast and abdominal site complications.A total of 638 flaps, 571 (89.4%) DIEP and 67 (10.5%) superficial, were performed with flap complication rates of 27.3 and 22.4%, respectively. At the recipient site, there was a significant difference in the rate of postoperative thrombosis (0.7% vs. 4.5%, p = 0.015); however, there were no differences for flap failure (0.4% vs. 1.5%, p = 0.28) or other flap complications. Donor site outcomes were similar between groups. Although not statistically significant, abdominal bulging was seen in 18 DIEP flap patients compared with none observed in the superficial flap patients (p = 0.24). When controlling for age, BMI, and radiation history, the overall rate of superficial flap and abdominal complications was not statistically significant from the rate of DIEP flap complications (p = 0.576).Compared with DIEP flaps, superficial flaps had significantly higher rates of immediate perioperative thrombosis. However, there were no significant differences in rates of flap failure or other flap complications with superficial flaps compared with DIEP flaps. There was a clinically significant trend toward increased abdominal bulging with the use of DIEP flaps. Our results will help surgeons better understand the risks and benefits associated with superficial flaps for ABR.

Microsurgery is a core component of U.S. plastic surgery residency curriculum. This study compares publicly available information on microsurgery curricula and training among U.S. plastic surgery residency programs, while evaluating the background and experience of microsurgeon faculty at these institutions.The authors performed a cross-sectional web search on 103 accredited U.S. plastic surgery residency programs in March 2023. Publicly available information evaluated for each program included nonclinical microsurgery education, clinical microsurgical exposure, and the number of microsurgeon faculty. The perceived gender and race, professorship title, previous training, academic productivity, and scope of practice were determined for each individual faculty member.While approximately one-half of programs had evidence of microsurgical skill labs with anastomosis models (n = 56; 54%), fewer had a formal microsurgery curriculum (n = 36; 35%), or benchmark examinations (n = 25; 24%). Significantly more home institutions provided clinical exposure to breast, trauma or cancer, head and neck, and hand-related microsurgery than gender (p < 0.001) and lymphedema microsurgery (p < 0.001). Of the 724 faculty microsurgeons, most were male (n = 543), Caucasian (n = 488), and assistant professors (n = 316). Faculty underrepresented in plastic surgery were most often assistant professors with significantly fewer years of experience than their male (p < 0.001) and Caucasian counterparts (p < 0.023).Great variability exists in clinical and nonclinical microsurgery training among U.S. plastic surgery residency programs. As the demand for microsurgery continues to rise, we can expect microsurgery education to become more uniform. Most microsurgeon faculty underrepresented in plastic surgery were earlier in their career, suggesting a potential shift in diversity as these individuals ascend the academic ladder.

Peripheral nerve repair is considered the gold standard treatment for complete nerve transection injuries, yet achieving satisfactory functional recovery remains challenging due to muscle atrophy during the time required for axonal regeneration. This study investigated the beneficial effects of 4-aminopyridine (4-AP), a potassium channel blocker, on neural and muscular recovery.Following complete transection of the right sciatic nerve, 40 mice underwent end-to-end nerve repair using microscopic epineural sutures and were randomly assigned to either the control or 4-AP groups immediately after surgery (n = 20 per group). The experimental animals were administered intraperitoneal injections of 200 μL normal saline or soluble 4-AP at a dose of 10 μg daily. The sciatic functional index (SFI) and nerve conduction studies were measured until 12 weeks postoperatively. Morphological analyses of nerve and muscle, and Western blotting for proteins associated with muscle atrophy were performed at 3 and 12 weeks after surgery.There were no significant differences in the SFI between the two groups. Nerve conduction study showed that 4-AP treatment increased the compound muscle action potential and decreased latency. A histomorphometric study showed that 4-AP treatment increased myelin thickness, G-ratio (axonal diameter/axoglial diameter on cross-sectioned nerve), cross-sectional area of myofibrils, and minimal Feret diameter of myofibrils. Additionally, expression levels of FoxO3 and mTORC1 were lower in the 4-AP treated mice, while myogenin expression levels showed no significant difference between the groups.4-AP treatment promotes myelination and prevents denervation-induced muscle atrophy after neurorrhaphy. These findings suggest that 4-AP may be a promising candidate for clinical consideration as an adjuvant therapy following nerve repair for transection injuries.

Venous thromboembolism (VTE) is considered a complication of free flap surgery. Prior studies investigating the use of the Caprini Risk Score (CRS) to estimate the risk of complications in free flap reconstruction are confounded by small sample sizes, varying surgical sites, and disparate classification of risk. This study evaluates the predictive merit of CRS for complications in free flap reconstructions.A retrospective review of patients (n = 502) who underwent free flap reconstruction from January 2015 to April 2022 collected patient medical history, type and location of free tissue transfer, CRS, and prior and perioperative anticoagulation (AC). Reconstructive outcomes and complications were analyzed in low (CRS <8) and high (CRS ≥8) cohorts using chi-square tests. Complications were also analyzed by flap sites in sufficient cohort populations (n > 10).Of 502 patients, the high CRS cohort (n = 71) was associated with upper (p < 0.005) and lower (p < 0.001) extremity reconstructions while the low CRS (n = 431) cohort was associated with breast reconstructions (p < 0.001). The high CRS cohort demonstrated an increased need for intraoperative blood transfusions (p < 0.001). Other intraoperative or postoperative complications such as flap loss, intraoperative AC, return to operating room (OR), or VTE had no significant correlations. High CRS patients were more likely to be discharged on AC (p < 0.001) and have a longer length of stay (LOS; p < 0.001). By flap site, there was a significant association between CRS and LOS >14 days in breast and head and neck flaps (p < 0.05) and discharge on AC in head and neck flaps only (p < 0.001).CRS may have utility in predicting the need for blood transfusion and AC requirements in free flap reconstruction but does not seem to predict the incidence of flap complications. A larger, higher-powered study may be used to assess the validity of CRS in risk of VTE and anticoagulant prophylaxis.

Microsurgical breast reconstruction offers superior outcomes after mastectomy, but vascular microanastomosis remains technically demanding. Venous couplers are widely adopted, whereas the use of arterial couplers remains controversial. This study aimed to establish an algorithmic approach for arterial coupler use and compare outcomes with hand-sewn sutures.A retrospective review was performed on 105 patients undergoing deep inferior epigastric perforator flap breast reconstruction by a single surgeon. Patients were divided into an arterial coupler group (n = 62) and a hand-sewn suture group (n = 43). An intraoperative algorithm guided coupler use, requiring the absence of atherosclerosis, intact intima, and adequate vessel laxity. Demographics, operative details, microanastomosis time, and postoperative outcomes were analyzed.Patients in the coupler group were younger (47.6 ± 8.6 vs. 53.0 ± 7.9 years, p = 0.001) and underwent more robot-assisted procedures (16.1% vs. 2.3%, p = 0.025). Microanastomosis time was significantly shorter with couplers (19.6 ± 8.9 vs. 26.1 ± 6.5 minutes, p < 0.01). Flap survival was comparable between groups (96.8% vs. 100%, p = 0.512). Complication rates, including arterial/venous insufficiency, hematoma, and infection, showed no significant differences. Two coupler failures occurred: One venous congestion and one late thrombosis, both attributed to multifactorial causes rather than device failure.Arterial couplers, when used under strict algorithmic selection criteria, provide reliable outcomes comparable to hand-sewn sutures while significantly reducing operative time. This approach enhances efficiency in microsurgical breast reconstruction and may guide future standardized practice.