Use of expanded reverse sural artery flap in lower extremity reconstruction

Effectiveness of the Reverse Sural Flap in Covering Diabetic Foot Ulcers: A Systematic Review and Meta-Analysis

Background: The reverse sural fasciocutaneous flap (RSFCF) has been used with success to cover noncomplicated foot and ankle soft tissue defects. However, there are some controversies when it is used in patients having chronic diabetic foot ulcers. This aim of this meta-analysis was to evaluate the efficacy of RSFCF in covering diabetic foot and ankle ulcers. Methods: A systematic review was undertaken from MEDLINE, EMBASE, Web of Science, Cochrane Library, and Google Scholar. Only diabetic foot and ankle ulcers were accepted for inclusion and all study designs were included. Proximally based flaps, nondiabetic ulcers, and assisted negative pressure therapy were excluded. Suitability for inclusion was assessed by 2 reviewers. The random-effect estimate was reported for the set outcomes whenever high heterogeneity was present. Metaregression analysis was performed to identify independent risk factors for failure. Results: The search identified 33 relevant studies comprising 187 patients and flap interventions; all but 1 were case-series. The weighted outcomes were as follows: (1) the flap healing rate was 93.3% while 6.6% resulted in total necrosis, (2) the rate of partial flap necrosis was 12%, (3) venous congestion was reported in 6.6% of cases, (4) the infection rate was 8.3%, and (5) the donor site morbidity was 4.6%. No association was found between pedicle width or presence of a subcutaneous pedicle tunnel and the primary outcome of total loss. Conclusions: This review demonstrated excellent results of the flap when covering complicated or large diabetic foot and ankle ulcers. When compared to those published in the literature, our results found RSFCF to be relatively less successful in diabetic wounds than in trauma patients but more successful than in those having associated osteomyelitis and those who were treated with random local flaps.

Reverse sural artery flap: a reliable alternative for foot and ankle soft tissue reconstruction

INTRODUCTION

Soft tissue defects of foot and ankle are challenging due to the susceptibility of the area to trauma and the complexity of the region. Several flaps have been described for wound coverage after surgical debridement at this location. The purpose of this study is to present the reverse sural flap for covering soft tissue defects at the ankle and foot.

MATERIALS AND METHODS

From July 2014 to November 2017, ten patients with soft tissue defect at the ankle and foot were retrospectively reviewed. There were nine men and one woman with a mean age of 40.5 years (range 17-71 years). Seven patients were smokers and five were diabetics. The mean size of the defect was 50.5 cm². All operations were performed by the same microsurgical team. At a mean follow-up of 21 months (range, 18 to 24 months), we evaluated wound healing and complications.

RESULTS

In nine patients, the soft tissue defect was successfully covered. In four patients, venous congestion was noticed, whereas in one patient, there was total necrosis of the flap. In all cases, the donor site was healed uneventfully.

CONCLUSION

The reverse sural artery flap is a reliable alternative for wound coverage at the ankle and foot, with low complication and morbidity rate. Nevertheless, it is a demanding microsurgical operation that requires knowledge of the anatomy and surgeons' experience.

Smoking and Flap Survival

Purpose

The aim of this study was to compare the complications of flap surgery in non-smokers and smokers and to determine how the incidence of complications was affected by the abstinence period from smoking before and after flap surgery.

Methods

In PubMed and Scopus, terms "smoking" and "flap survival" were used, which resulted in 113 papers and 65 papers, respectively. After excluding 6 duplicate titles, 172 titles were reviewed. Among them, 45 abstracts were excluded, 20 full papers were reviewed, and finally 15 papers were analyzed.

Results

Post-operative complications such as flap necrosis (P < .001), hematoma (P < .001), and fat necrosis (P = .003) occurred significantly more frequently in smokers than in non-smokers. The flap loss rate was significantly higher in smokers who were abstinent for 24 hours post-operatively than in non-smokers (n = 1464, odds ratio [OR] = 4.885, 95% confidence interval [CI] = 2.071-11.524, P < .001). The flap loss rate was significantly lower in smokers who were abstinent for 1 week post-operatively than in those who were abstinent for 24 hours post-operatively (n = 131, OR = 0.252, 95% CI = 0.074-0.851, P = .027). No significant difference in flap loss was found between non-smokers and smokers who were abstinent for 1 week preoperatively (n = 1519, OR = 1.229, 95% CI = 0.482-3.134, P = .666) or for 4 weeks preoperatively (n = 1576, OR = 1.902, 95% CI = 0.383-2.119, P = .812).

Conclusion

Since smoking decreases the alveolar oxygen pressure and subcutaneous wound tissue oxygen, and nicotine causes vasoconstriction, smokers are more likely to experience flap loss, hematoma, or fat necrosis than non-smokers. Preoperative and post-operative abstinence period of at least 1 week is necessary for smokers who undergo flap operations.

The extended distally based sural neurocutaneous flap for foot and ankle reconstruction: a retrospective review of 10 years of experience

The distally based sural neurocutaneous flap has been used for coverage of defects in foot and ankle for years. Conventional flaps do not extend to the upper third of the leg, which limits its application. The current study presents results using extended distally based sural neurocutaneous flaps for reconstruction of extensive soft tissue defects of the foot and ankle in 21 patients. All injuries occurred from 2001 to 2011 as a result of a traumatic event. Follow-up of 21 patients ranged from 7 months to 5 years after surgery. All 21 flaps survived successfully. The largest flap used measured 26 × 15 cm. Complications included 1 distal marginal necrosis and 2 slight venous congestions. The extended distally based sural neurocutaneous flap is a good alternative for extensive soft tissue defects of foot and ankle. The operative techniques with several simple modifications in harvesting the flaps are easy to handle and will not prolong the operation time.

Versatility of delayed reverse-flow islanded sural flap for reconstructing pretibal defects among high-risk patients

BACKGROUND AND OBJECTIVE

Reconstructing defects related to the leg soft tissue may be quite difficult because the soft tissue over the bone is rather thin and the tendons lie right under the skin. Distal pedicle sural neurocutaneous flap with its long pedicle composed of skin, subcutaneous tissue and fascia is suitable for superficial defects. This study aimed to determine the usability of the delayed reverse-flow (distally based) islanded sural flap for correcting tibial and ankle defects.

DESIGN AND SETTINGS

A prospective clinical trial conducted from 2012 to 2013 in Plastic & Reconstructive and Aesthetic Surgery clinic, Necmettin Erbakan University, Turkey.

METHODS

Eleven patients with pretibial defects and a visible open bone who underwent reconstruction with reverse-flow islanded sural flap between 2012 and 2013 were included in the study. All patients who had defects between the middle of the tibia and the foot underwent surgery in 2 sessions under spinal anesthesia. In the first session, necrotic tissues were debrided and cultures were taken, and the flap was delayed. Reconstruction was performed in the second session.

RESULTS

The biggest flap was 16.11 cm and the smallest one was 5.6 cm. The longest pedicle was 27 cm long and the shortest one 21 cm. A total of 6 patients were smokers and 3 had diabetes mellitus. One patient had partial necrosis of the flap, and the necrosis was healed secondarily. No complications were seen in other patients.

CONCLUSION

Delayed reverse-flow islanded sural flaps can be used as an easy, quick, and secure surgical alternative to free flaps for correcting in leg defects involving an exposed bone between the middle portion of the tibia and the heel.

Bone propeller flap: a staged procedure

The ideal reconstruction technique for complex defects of the lower limb consists of replacing tissue with similar tissue in an attempt to achieve a good functional result. A 23-year-old white male sustained a crush injury with a grade IIIB open ankle dislocation. After open reduction and fixation, the patient developed severe osteomyelitis at the tibiotalar joint requiring a staged and radical debridement with a substantial combined soft tissue and bony defect over the distal tibia, fibula, and talus area. The reconstructive approach consisted of a modified model of the propeller flap, implementing the spare part concept in a 2-stage procedure using a prefabricated and vascularized "double-barrel" fibular graft. At 17 months postoperatively, a plain radiograph showed bony union with complete and stable coverage of the soft tissue defect. The patient was fully weightbearing. In conclusion, there is evidence to suggest that the established concept of a soft tissue propeller flap can be implemented on bone.