Journal of reconstructive microsurgery最新文献

Background:  Superficial inferior epigastric artery (SIEA) flap offers a significant advantage of lower donor site morbidity over other abdominal-based flaps for breast reconstruction. However, the inconsistent anatomy and territory across the midline remains a major issue. This study aimed to investigate the SIEA and determine its pattern and territory across the midline.

Methods:  Twenty cadavers were studied. Ipsilateral dye was injected to the dominant SIEA. Dissection was performed to evaluate the SIEA origin, artery and vein pattern, vessel diameter, and dye diffusion territory.

Results:  Overall, three SIEA patterns were identified: bilateral presence (45%), ipsilateral presence (30%), and bilateral absence (25%). The territory depended on the vessel course and dominant SIEA diameter, not on its common origin from the femoral artery, at the pubic tubercle level. Regarding the midline territory (pubic tubercle level to umbilicus), SIEA (type 1a) with a diameter of ≥1.4 mm on either side supplied at least half the distance, whereas SIEA with a diameter of <1 mm was limited to the suprapubic area.

Conclusion:  Designing a SIEA flap island across the midline is feasible when contralateral SIEA is present to augment the contralateral territory (e.g., type 1a SIEA) or in SIEA with a common/superficial external pudendal artery origin. Preoperative imaging studies are important for confirming the SIEA system. When the diameter at the origin of the SIEA flap is larger than 1.4 mm, the blood supply to the ipsilateral and contralateral sides is sufficient to enable safe flap elevation.

Background:  Salivary fistula formation is a common and serious complication following head and neck reconstruction. Because it can cause delayed wound healing and infection and carotid artery rupture in severe cases, hence, early detection and treatment are crucial. This study was designed to identify early predictors of postoperative fistula formation.

Methods:  We conducted a retrospective analysis of patients who underwent head and neck reconstruction between 2015 and 2022. Body temperature, serum white blood cell (WBC) count, and serum C-reactive protein (CRP) levels were assessed until postoperative day (POD) 14 and compared between patients with and without fistula.

Results:  In this study, 200 patients were included. No significant differences in body temperature and WBC count were observed between the two groups during the entire study period. CRP levels after POD2 were higher in the fistula group than in the without fistula group. From the receiver operating characteristic curves comparing the two groups, the best cutoff level for CRP was 6.27 mg/dL from POD7 to POD8, with 77.1% sensitivity, 69.8% specificity, and 90.1% negative predictive value.

Conclusion:  CRP is a valuable predictor of fistula formation following head and neck reconstruction. The course of CRP levels in patients with fistulas remains consistently elevated compared to patients without fistulas, and it is particularly useful for the exclusion diagnosis of fistula.

Background:  Within the last 20-years, Medicare reimbursements for microsurgery have been declining, while physician expenses continue to increase. As a result, hospitals may increase charges to offset revenue losses, which may impose a financial barrier to care. This study aimed to characterize the billing trends in microsurgery and their implications on patient care.

Methods:  The 2013 to 2020 Provider Utilization and Payment Data Physician and Other Practitioners Dataset was queried for 16 CPT codes. Service counts, hospital charges, and reimbursements were collected. The utilization, weighted mean reimbursements and charges, and charge-to-reimbursement ratios (CRRs) were calculated. The total and annual percent changes were also determined.

Results:  In total, 13 CPT codes (81.3%) were included. The overall number of procedures decreased by 15.0%. The average reimbursement of all microsurgical procedures increased from $618 to $722 (16.7%). The mean charge increased from $3,200 to $4,340 (35.6%). As charges had a greater increase than reimbursement rates, the CRR increased by 15.4%. At the categorical level, all groups had increases in CRRs, except for bone graft (-49.4%) and other procedures (-3.5%). The CRR for free flap breast procedures had the largest percent increase (47.1%). Additionally, lymphangiotomy (28.6%) had the second largest increases.

Conclusion:  Our analysis of microsurgical procedures billed to Medicare Part B from 2013 to 2020 showed that hospital charges are increasing at a faster rate than reimbursements. This may be in part due to increasing physician expenses, cost of advanced technology in microsurgical procedures, and inadequate reimbursement rates. Regardless, these increased markups may limit patients who are economically disadvantaged from accessing care. Policy makers should consider legislation aimed at updating Medicare reimbursement rates to reflect the increasing complexity and cost associated with microsurgical procedures, as well as regulating charge markups at the hospital level.

Background:  While free jejunum transfer (FJT) following total pharyngo-laryngo-esophagectomy (TPLE) is a reliable reconstruction technique, the jejunum flap is viewed as more susceptible to ischemia than a standard free flap. Animal studies have indicated that the jejunum can tolerate ischemia for as little as 2 to 3 hours. Clinical studies also reported increased complications after the FJT with more than 3 hours of ischemia. Traditionally, our institution has carried out FJT with an initial intestinal anastomosis, followed by a vascular anastomosis, which often results in extended jejunal ischemia time. In this study, we retrospectively examined the actual tolerance of the jejunum to ischemia, considering perioperative complications and postoperative dysphagia.

Methods:  We retrospectively studied 402 consecutive cases involving TPLE + FJT. Patients were divided into five groups based on jejunum ischemia time (∼119 minutes, 120∼149 minutes, 150∼179 minutes, 180∼209 minutes, 210 minutes∼), with each variable and result item compared between the groups. Univariate and multivariate analyses were conducted to identify independent factors influencing the four results: three perioperative complications (pedicle thrombosis, anastomotic leak, surgical site infection) and dysphagia at 6 months postoperatively.

Results:  The mean jejunal ischemia time was 164.6 ± 28.4 (90-259) minutes. When comparing groups divided by jejunal ischemia time, we found no significant differences in overall outcomes or complications. Our multivariate analyses indicated that jejunal ischemia time did not impact the three perioperative complications and postoperative dysphagia.

Conclusion:  In TPLE + FJT, a jejunal ischemia time of up to 4 hours had no effect on perioperative complications or postoperative dysphagia. The TPLE + FJT technique, involving a jejunal anastomosis first followed by vascular anastomosis, benefits from an easier jejunal anastomosis but suffers from a longer jejunal ischemia time. However, we found that ischemia time does not pose significant problems, although we have not evaluated the effects of jejunal ischemia extending beyond 4 hours.

Background:  This study aimed to quantify the blood flow of free flaps and compare the blood flow of small vessel (<0.8 mm) and larger vessel (>0.8 mm) anastomosed free flaps.

Methods:  This retrospective study included patients treated successfully with a perforator free flap in the lower extremity between June 2015 and March 2017. A color duplex ultrasound system measured the flow volume through the pedicle by analyzing the mean flow peak velocity, flow volume, and flow volume per 100 g of the flap.

Results:  A total of 69 patients were enrolled in this study. There was no statistical difference in peak velocity between the small vessel anastomosed free flap (25.2 ± 5.6) and larger vessel anastomosed free flap (26.5 ± 5.4). Flow volume (6.8 ± 4.2 vs. 6.3 ± 3.6) and flow volume/100 g (3.6 ± 3.9 vs. 6.2 ± 6.9) also did not show significant differences.

Conclusion:  Small vessel (<0.8 mm) free flaps showed similar flow velocity and flow volume to larger vessel (>0.8 mm) anastomosed free flaps. Blood flow to the small vessel anastomosed free flap was sufficient despite its small vessel size.

Background:  Microsurgery requires complex skill development with a steep learning curve for plastic surgery trainees. Flap dissection courses and simulation exercises are useful to acquire these skills. This study aims to assess plastic surgery training programs' access to and interest in microsurgical courses.

Methods:  A survey was distributed to plastic surgery residency and microsurgery fellowship program directors (PDs). The survey collected program demographics and attendance of trainees at structured microsurgical skills or flap dissection courses. We assessed if PDs thought trainees would benefit from instructional courses.

Results:  There were 44 residency PD responses (44/105, 41.9%, 36 integrated, 8 independent), and 16 fellowship PD responses (16/42, 38.1%). For residency PDs, 54.5% (24/44) sent residents to flap courses, and 95% (19/20) of remaining PDs felt residents would benefit from attending. In addition, 59.1% of programs (26/44) sent residents to microsurgical skills courses, and 83.3% (15/18) of remaining PDs felt residents would benefit from attending. When examining fellowship PDs, 31.2% of programs (5/16) sent fellows to flap dissection courses and 10/11 of remaining PDs felt fellows would benefit from attending a course (90.1%). Half of programs (8/16) sent fellows to microsurgical skills courses, and 7/8 remaining PDs felt fellows would benefit from attending (87.5%).

Conclusion:  Only half of the plastic surgery trainees have access to microsurgical skills and flap dissection courses. The majority of residency and fellowship PDs feel that training courses are valuable. Expanding access to these courses could provide a significant benefit to microsurgical education in plastic surgery training.

Background:  Split anterolateral thigh flap is a versatile reconstruction option, yet long underestimated as no practical perforator classification and no optimal strategy were present. Harvesting "capillary nonsizable perforators" could potentially expand flap splits to those with no existing multiple sizable perforators. Concerns over defect characteristics, recipient vessels, pedicle length, and split timing should all be weighted equally in designing the suitable flap. Refinement is thus required to enable precise reconstructions.

Methods:  All patients undergoing anterolateral thigh flap harvests between 2014 and 2021 performed by a single surgeon were included. The perforator patterns of sizable pedicle, course, origin, and further successful flap-split methods were documented. Surgical outcome of flap survival was analyzed.

Results:  Anatomical variants of 134 (48.4%) dual, 123 (44.4%) single, and 20 (7.2%) no sizable perforators were found in a total of 277 anterolateral thigh flaps. The overall flap survival rate was 97.5%. Flap split was performed in 82 flaps, including 29 single and 5 no sizable perforator cases previously considered "unsplittable," by utilizing a series of direct skin paddle split, capillary nonsizable perforators harvesting, and flow-through anastomosis technique. Comparable flap survivals were found between split and nonsplit flaps as well as between split segments supplied by sizable and capillary nonsizable perforators. Primary closure was achieved in 98.9% of the thigh donor sites.

Conclusion:  A new classification of the common anterolateral thigh flap anatomical variants was proposed and a comprehensive algorithm of split flap strategy was developed along with the innovative "fabricate" concept.

Background:  The most common method for autologous breast reconstruction is the deep inferior epigastric perforator (DIEP) flap. The umbilicus can be managed in various ways, including re-inset, neoumbilicus, and umbilectomy without reconstruction. This study evaluated the aesthetic differences in umbilicus reconstruction choice and variation in patients' postoperative satisfaction with their abdomen.

Methods:  A retrospective review of 1,019 patients treated with DIEP flap breast reconstruction between August 2009 and January 2022 was conducted. Patients were stratified by management of the umbilicus: preservation and re-inset of the native umbilicus, umbilectomy with delayed reconstruction, and umbilectomy with no reconstruction. A crowdsourced survey was created to assess the aesthetic preference of each photograph using a Likert scale.

Results:  There were 1,063 responses to the umbilicus preference crowd source survey. Patients who had delayed umbilicus reconstruction after umbilectomy were rated to be significantly more attractive (4.397 ± 1.697) than both preservation of the native umbilicus (4.176 ± 1.669) and lack of the umbilicus (3.994 ± 1.733; p < 0.001 and <0.001, respectively). In an analysis of the BREAST-Q scores, delayed reconstruction patients had a similar change across measures when compared to the re-inset group. The delayed group had a significantly higher change in overall satisfaction and well-being with abdomen when compared with the no reconstruction group (p = 0.006 and 0.027, respectively).

Conclusion:  This study demonstrates that umbilectomy with delayed reconstruction yields a significantly higher aesthetic rating and comparable patient satisfaction when compared to re-inset of the umbilicus.

Background:  There has been increasing emphasis on patient-reported satisfaction as a measure of surgical outcomes. While previous research has investigated factors influencing patient satisfaction following breast reconstruction, there are few studies on how patient satisfaction is impacted by revision procedures. The purpose of this study was to investigate whether elective revisions following breast reconstruction are significantly associated with changes in patient-reported outcomes and quality of life.

Methods:  A retrospective review was conducted of patients who underwent immediate autologous or alloplastic breast reconstruction at a single institution from 2015 to 2021. Patients were included if they had completed BREAST-Q preoperatively, post-initial reconstruction, and post-revision procedures. Patients were excluded if they received adjuvant radiation or if they had previously undergone breast reconstruction procedures. The primary outcome measures were BREAST-Q domains. Demographic, clinical, and surgical variables were also analyzed.

Results:  Of the 123 patients included for analysis, 61 underwent autologous breast reconstruction and 62 underwent alloplastic reconstruction. Mean age was 49.31 ± 11.58 years and body mass index (BMI) was 29.55 ± 5.63 kg/m². Forty-eight patients underwent no revision procedures and 75 patients underwent at least one revision. Between these two groups, there were no differences in age, BMI, complication rates, socioeconomic status, or preoperative BREAST-Q scores. Patients reported significantly higher satisfaction with outcome after their first revision compared with after initial reconstruction alone (p = 0.04). Autologous reconstruction patients who had at least one revision had significantly higher satisfaction with outcome (p = 0.02) and satisfaction with surgeon (p = 0.05) in the 2-year follow-up period compared with patients who had no revisions.

Conclusion:  Revision procedures following autologous breast reconstruction are associated with higher patient satisfaction with outcome. Further research should explore specific factors influencing patient decision-making regarding whether to undergo revisions.