Long-term outcomes analysis of flap-based perineal reconstruction.

BACKGROUND: High-risk patients undergoing abdominoperineal resection and pelvic exenteration may benefit from immediate flap reconstruction. However, there is currently no consensus on the ideal flap choice or patient for whom this is necessary. This study aimed to evaluate the long-term outcomes of using pedicled gracilis flaps for pelvic reconstruction and to analyze predictors of postoperative complications. METHODS: This was a retrospective review of a single reconstructive surgeon's cases between January 2012 and June 2021 identifying patients who underwent perineal reconstruction secondary to oncologic resection. Preoperative and outcome variables were collected and analyzed to determine the risk of developing minor and major wound complications. RESULTS: A total of 101 patients were included in the study with most patients (n = 88) undergoing unilateral gracilis flap reconstruction after oncologic resection. The mean follow-up period was 75 months. Of 101 patients, 8 (7.9%) developed early major complications, and an additional 13 (12.9%) developed late major complications. Minor complications developed in 33 patients (32.7%) with most cases being minor wound breakdown requiring local wound care. Most patients (n = 92, 91.1%) did not develop donor site complications. Anal cancer was significantly associated with early major complications, whereas younger age and elevated body mass index were significant predictors of developing minor wound complications. CONCLUSIONS: This study builds on our previous work that demonstrated the long-term success rate of gracilis flap reconstruction after large pelvic oncologic resections. A few patients developed donor site complications, and perineal complications were usually easily managed with local wound care, thus making the gracilis flap an attractive alternative to abdominal-based flaps.

Psychosocial Risk Stratification in Upper Extremity Transplantation Candidates.

BACKGROUND: Candidate selection for upper extremity transplantation remains an inherently subjective process. This work evaluated the effect that psychosocial factors have on outcomes, both to standardize evaluation of potential candidates and in optimizing these factors prior to transplantation. Our goal was to measure and quantify the risk that various psychosocial factors have on transplant outcomes. METHODS: Given that we do not have sufficient post-transplant patients to examine specific factors, we chose to have experts in the field evaluate hypothetical patients based on their experience. We used a Generalized Estimating Equation to estimate and compare surgical candidacy scores using patient scenario vignettes based on the presence or absence of permutations of the following: (1) depression; (2) participation in occupational therapy (OT); (3) expectation of post-transplant function; (4) punctuality; and (5) family support were given to experts in the field. RESULTS: This work suggests there is a decrease in predicted success with increasing numbers of negative factors with participation in OT and realistic expectations of outcomes being most important. An increase in the summarizing risk score from 0 to 1.7 was associated with a decrease in the outcome surgical candidacy score from 8.6 to 5.3, meaning candidates with 2 risk factors would often observe a large drop in surgical candidacy score. CONCLUSIONS: Focusing on optimizing psychosocial variables in transplant candidates may help improve hand transplant success.

Psychosocial predictors in upper-extremity vascularized composite allotransplantation: A qualitative study of multidimensional experiences including patients, healthcare professionals, and close relatives.

Background: The impact of patient-specific psychosocial factors on functional outcomes after upper-extremity (UE) vascularized composite allotransplantation (VCA) is poorly understood. The objective of this study was to identify relevant psychosocial predictors for success or failure of UE VCA in an Austrian cohort. Methods: A qualitative study was undertaken consisting of semi-structured interviews with UE VCA staff, transplanted patients, and close relatives. Participants were asked about their perceptions of factors that either favored or hindered a successful transplant outcome, including functional status before surgery, preparation for transplant, decision-making, rehabilitation and functional outcome after surgery, and family and social support. Interviews were conducted online and recorded with the consent of interviewees. Results: Four bilateral UE VCA patients, 7 healthcare professionals, and a sister of a patient participated in the study. Thematic analysis revealed the importance of an expert interdisciplinary team with adequate resources for patient selection. Psychosocial aspects of prospective candidates are crucial to evaluate as they contribute to success. Both patients and providers may be impacted by public perceptions of UE VCA. Functional outcomes are optimized with a life-long commitment to rehabilitation as well as close, ongoing provider involvement. Conclusion: Psychosocial factors are important elements in the assessment and follow-up care for UE VCA. To best capture psychosocial elements of care, protocols must be individualized, patient-centered, and interdisciplinary. Investigating psychosocial predictors and collecting outcomes is, thus, critical to justifying UE VCA as a medical intervention and to providing accurate and salient information to prospective candidates.

A Provider Perspective of Psychosocial Predictors of Upper-Extremity Vascularized Composite Allotransplantation Success.

PURPOSE: We performed a qualitative study to understand the psychosocial factors associated with success in upper-extremity vascularized composite allotransplantation from the perspective of transplant providers. METHODS: We recruited 13 providers actively involved in upper-extremity vascularized composite allotransplantation. Participants included physicians, nurses, social workers, occupational therapists, and research administrators. We conducted semistructured face-to-face focus group interviews using a guide that explored providers' perceptions of qualities contributing to transplant outcome. Topics included social support networks and their influence on recovery, barriers to treatment compliance and successful posttransplant rehabilitation, and the process of setting patients' expectations. We performed a thematic analysis that produced a list of themes, subthemes, and proposed hypotheses explaining how the themes related to the study's guiding questions. RESULTS: The analysis identified numerous factors that contribute to transplant success: (1) recipients' prior experiences modify their ability to cope and adapt after transplantation, (2) behaviors and characteristics such as positivity influence candidacy and may be predictive of successful outcomes, and (3) social support is essential for improved function and compliance. The provider care team cited difficulty in predicting recipient compliance and in setting realistic expectations. CONCLUSIONS: Motivated recipients with developed coping and resiliency, a positive attitude, and stable, physically-able caregivers are perceived by providers to have greater success after transplantation. CLINICAL RELEVANCE: Findings from this work may help providers determine optimal candidates for upper-extremity vascularized composite allotransplantation.

Thumb reconstruction by "on-top-plasty" of the long finger.

A 61 year old man sustained electrical burns to hands requiring amputation of the right thumb and index finger at the metacarpophalangeal level. The thumb was reconstructed by means of on-top-plasty of the long finger. This is a reliable and safe technique in selected patients with severe, traumatic hand injuries.

Perceived Success in Upper-Extremity Vascularized Composite Allotransplantation: A Qualitative Study.

PURPOSE: We performed a qualitative study to understand psychosocial factors associated with perceived success of upper-extremity vascularized composite allotransplantation (VCA). We interviewed transplant recipients and their primary caregivers. METHODS: We recruited 4 upper-extremity VCA recipients and primary caregivers for 3 of them. We conducted semistructured face-to-face interviews using a guide that explored participants' transplantation experiences. Topics included comparison of pretransplant and posttransplant expectations, reflections on factors contributing to the success of the transplant experience, and posttransplant rehabilitation and functioning. We performed a thematic analysis that produced a list of themes, subthemes, and proposed hypotheses explaining how the themes related to the study's guiding questions. RESULTS: Participants described several factors as contributing to the success of the transplant experience, including developing realistic expectations about posttransplant function and lifelong immunosuppression, support from one's community and particularly the primary caregiver, and framing the experience in a positive light. Social, aesthetic, and other values unique to the hands, as opposed to prosthetics, motivated recipients to undergo VCA despite its inherent risk and uncertainties. CONCLUSIONS: Despite inherent challenges, undergoing VCA was viewed as worthwhile to regain benefits unique to hands. Participants met the challenges of the transplant process through setting realistic expectations, strong social support, and a positive perspective. CLINICAL RELEVANCE: Findings from this work may help clinicians and prospective patients to prepare for and set appropriate expectations of VCA.

A Yorkshire swine (Sus scrofa domesticus) model for nerve regeneration and ischemia based on the sciatic nerve and femoral artery.

Animal studies are essential to biomedical research and the cornerstone is a reproducible animal model. While there are many reports on rodent peripheral nerve injury models, a large animal model is essential to confirm the effects of nerve regeneration over the longer distances of regeneration required in humans. Swine have long been used as a large animal model for other surgical and biomedical studies. This paper represents a novel neurovascular injury model in the Sus scrofa domesticus swine (American Yorkshire pig). This paper will describe our experience and recommendations with pre-operative, operative and post-operative protocols and our refinements to produce an effective model.

Psychosocial Predictors of Upper Extremity Transplantation Outcomes: A Review of the International Registry 1998-2016.

BACKGROUND: Upper extremity transplantation (UET) is becoming increasingly common. This article attempts to collate data from cases contributing to the International Registry on Hand and Composite Tissue Transplantation (IRHCTT), define psychosocial themes perceived as predictors of success using statistical methods, and provide an objective measure for optimization and selection of candidates. METHODS: The IRHCTT provided anonymous data on UET recipients. A supplementary psychosocial survey was developed focusing on themes of depression, posttraumatic stress disorder (PTSD), anxiety, interpersonal functioning and dependence, compliance, chronic pain, social support, quality of life, and patient expectations. We determined the risk of transplant loss and psychological factors associated with higher risk of transplant loss. RESULTS: Sixty-two UET recipients reported to the IRHCTT. Forty-three psychosocial surveys (68%) were received, with 38 (88%) having intact transplants and 5 (12%) being amputated. Among recipients with a diagnosis of anxiety (N = 29, 67%), 5 (17%) reported transplant loss (P = 0.03). Among those with depression (N = 14, 33%), 2 recipients (14%) has transplant loss (P = 0.17); while 4 recipients (22%) with PTSD (N = 18, 42%) had transplant loss (P = 0.01). Of participants active in occupational therapy (N = 28, 65%), 2 (7%) reported transplant loss (P = 0.09). Of recipients with realistic functional expectations (N = 34, 79%), 2 (6%) had transplant loss versus 3 (34%) who were felt to not have realistic expectations (N = 9, 21%, P = 0.05). Recipients with strong family support (N = 33, 77%) had a lower risk of transplant loss compared with poor or fair family support (N = 10, 23%), but did not reach statistical significance (6% versus 30%, P = 0.14). CONCLUSION: Anxiety, depression, PTSD, participation in occupational therapy, expectations for posttransplant function, and family support are associated with postsurgical transplant status.

Combined delivery of VEGF and IGF-1 promotes functional innervation in mice and improves muscle transplantation in rabbits.

Microvascular muscle transfer is the gold standard for reanimation following chronic facial nerve paralysis, however, despite the regenerative capacity of peripheral motor axons, poor reinnervation often results in sub-optimal function. We hypothesized that injection of alginate hydrogels releasing growth factors directly into donor tissue would promote reinnervation, muscle regeneration, and function. A murine model of sciatic nerve ligation and neurorrhaphy was first used to assess the ability of gel delivery of vascular endothelial growth factor (VEGF) and insulin-like growth factor-1 (IGF-1) to promote functional reinnervation. VEGF + IGF-1 gel delivery to aged mice resulted in prolonged ability to control toe movement, increased toe spreading, and improved static sciatic index score, indicative of improved sciatic nerve and neuromuscular junction function. Further, a 26% increase in muscle fiber area, and 2.8 and 3.0-fold increases in muscle contraction force and velocity, respectively, were found compared to blank alginate in the murine model. This strategy was subsequently tested in a rabbit model of craniofacial gracilis muscle transplantation. Electromyography demonstrated a 71% increase in compound muscle action potential 9 weeks after transplantation following treatment with VEGF + IGF-1 alginate, compared to blank alginate in the rabbit model. Improving functional innervation in transplanted muscle via a hydrogel source of growth factors may enhance the therapeutic outcomes of facial palsy treatments and, more broadly, muscle transplantations.

Gracilis Flap Reconstruction of the Perineum: An Outcomes Analysis.

BACKGROUND: Immediate reconstruction of perineal defects secondary to abdominoperineal resection (APR) or pelvic exenteration with pedicled flaps decreases postoperative wound complications when compared with direct closure in high-risk patients. Although some authors have been proponents of abdominal-based flaps, here we evaluate the role for thigh-based flaps founded on acceptable outcomes and low morbidity. STUDY DESIGN: Consecutive patients referred to a single surgeon between January 2012 and August 2015 who underwent perineal reconstruction with a pedicled gracilis flap were identified. Patients were evaluated for routine preoperative variables and outcomes data were analyzed, including time to healing and abdominal and perineal complications. RESULTS: Forty patients were included in the study, with a mean follow-up period of 2 years. There were no 30-day mortalities and 37 patients (92.5%) were alive at the last follow-up. Five patients (12.5%) experienced donor site complications and 16 patients (40%) had recipient site complications, including hematoma, seroma, or dehiscence. Minor complications were seen in 10 (25%) patients, and 7 (17.5%) patients had major complications. Obesity (odds ratio = 7.5; p = 0.01) and active smoking status (odds ratio = 9.3; p = 0.01) were significantly associated with minor complications, and a history of neoadjuvant chemoradiation (odds ratio = 21.4; p = 0.04) was a significant risk factor for any complication. CONCLUSIONS: The overall complication rate with this technique is comparable with the more commonly used vertical rectus abdominis myocutaneous flap, but the potential for, and severity of, donor site complications is reduced with this technique. As such, gracilis flaps can be considered an acceptable alternative to abdominal flaps for selected perineal wounds.