The distally based superficial sural flap for reconstruction of the lower leg and foot

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.

Long-Term Clinical and Functional Outcomes of Distally Based Sural Artery Flap: A Retrospective Case Series

Background

Reconstruction of soft tissue defects around the lower leg, foot and ankle is a challenge for orthopedic surgeons. These defects commonly occur as a result of trauma, infection and tumor excision. Sural artery neurovascular island flap is a relatively thin, pliable and insensate flap with minimum donor-site morbidity and acceptable aesthetic outcome.

Methods

A retrospective analysis of a case series was conducted, all operated by a single surgeon over a period of 25 years from July 1996 to February 2020. Data were collected through a structured proforma; the variables included were as follows: demographic data, mechanism of injury, defect site and size, size of flap, hospital stay, complications, outcome of flap and functional status of limb. Data analysis was performed by using SPSS version 25.0.

Results

We included 89 patients out of 106, with 92 distally based sural artery flaps. The flap coverage was divided in two groups: group I for leg (n=41) and group II for foot (n=51). The mean flap dimension in leg was 9.98 ± 2.2 cm and 12.15 ± 3 cm in foot. Postoperatively functional outcomes were assessed using a self-designed tool and graded as excellent in 79 cases (leg=38; foot=41), good in 10 cases (leg=2; foot=8), fair in 3 cases (leg=1; foot=2) and poor in zero cases. All flaps survived uneventfully.

Conclusion

The reverse sural artery flap is versatile and reliable, and can be performed easily with good knowledge and using a microsurgical technique. It is useful for the reconstruction of soft tissue defects around the lower third of the leg, dorsum of the foot, malleoli and hind foot. The functional range of motion of the ankle is not compromised because of the flap's supple and pliable nature. The reverse sural artery flap is ideal for the coverage of the foot, ankle and lower one third of the leg. This flap is insensate and not suitable for the weight-bearing area of the heel.

Pedicled sural flaps versus free anterolateral thigh flaps in reconstruction of dorsal foot and ankle defects in children: a systematic review

BACKGROUND

This systematic review compared free anterolateral thigh (ALT) flaps versus pedicled distally based sural artery (DBSA) flaps for reconstruction of soft tissue defects of dorsal foot and ankle in children.

METHODS

A systematic literature search was performed to identify cases where an ALT or DBSA was used to reconstruct the dorsal foot in children. A total of 19 articles were included in the systematic review.

RESULTS

Eighty-three patients underwent an ALT reconstruction and 138 patients underwent a DBSA reconstruction. Patients who had a DBSA were more likely to require grafting of the donor site (P<0.001). The size of ALT flaps was significantly larger than DBSA flaps (P=0.002). Subsequent flap thinning was required in 30% of patients after ALT and 12% of patients after DBSA reconstruction (P<0.001). Complications occurred in 11.6% of DBSA and 8.4% of ALT flaps (8.4%).

CONCLUSIONS

Both flaps are valid options in reconstructing pediatric foot and ankle defects. Each flap has advantages and disadvantages as discussed in this review article. In general for larger defects, an ALT flap was used. Flap choice should be based on the size of the defect.

Concurrent internal fixation and soft tissue reconstruction by distally based sural flap: a practicable scheme for complex distal tibial fractures

BACKGROUND

It is difficult to establish both fracture union and wound healing of open fractures complicated with soft tissue defects of the distal tibia. We describe the simultaneous use of internal fixation and soft tissue coverage by a distally based sural flap (DBSF) for these complex injuries.

METHODS

Seventeen patients with Gustilo IIIB open fractures of the distal tibia were operated on by internal fixation and DBSF coverage. Data were collected on the size of the defect, time to fixation and soft tissue coverage or 'fix & flap', types of implant, time to union, postoperative complications and objective clinical measurement.

RESULTS

The average size of the soft tissue defect after debridement was 6.4 × 8.4 cm² (range 4.0-9.0 × 6.0-12.0). The mean time to fix & flap was 8.1 days (range 7-10). A medial precontoured plate was used in 8 patients and an anterolateral precontoured plate in 9. All fractures were united in a mean duration of 22.6 weeks (range 20-28). One patient had partial flap necrosis. Using the Puno functional score, 2 patients had excellent functional outcomes and 15 patients had good functional outcomes.

CONCLUSION

Concurrent Internal fixation and soft tissue reconstruction by DBSF is effective and reproducible for Gustilo type III open fractures of the distal tibia even in cases of more than 50 cm² soft tissue defects.

A Retrospective Study of an Updated and Traditional Surgical Approach of the Distally Based Sural Flap

BACKGROUND

 The distally based sural flap (DBSF) is one of the armamentarium in the lower limb reconstruction. However, the flap has not gained popularity due to concerns about its reliability and donor site morbidity. Based on the anatomy characterization, we combined and developed five modifications to improve the vascular supply and reduce donor site morbidity.

PATIENTS AND METHODS

 The authors performed a comparison of retrospective study that included patients who underwent either traditional distally based sural flap (tDBSF) or modified distally based sural flap (mDBSF) surgery approach for ankle, heel, and dorsal foot coverage between January 2007 and May, 2019. The five modifications developed to improve the reliability of the flap include: 1. shift the pivot point more proximally 7.0 cm above the lateral malleolus, 2. preserve the lesser saphenous vein and include branches that communicates with the flap, 3. harvest thinner fascial pedicle, 4. change the skin incision to "S" shape, 5. closure of the donor site with a propeller flap.

RESULTS

 Thirty-one patients underwent mDBSF, and 23 received tDBSF. There were no significant differences in the size of the DBSF. Mean pedicle width was significantly narrower in mDBSF (1.63 ± 0.52 cm vs. 3.81 ± 0.70 in tDBSF). The pivot point was also found to be higher in mDBSF (8.01 ± 0.63 cm vs. 5.46 ± 0.56 cm) above the lateral malleolus. In mDBSF, the size of the propeller flap required for donor site closure was 53.45 ± 19.06 cm² (range 33-80 cm²). The rate of partial necrosis between mDBSF and tDBSF was significantly different (9.68 vs. 34.78%). While the other complications had no difference.

CONCLUSION

 The modifications applied to the harvesting of the DBSF have achieved higher survival rate, lower dehiscence rate, and shorter hospital stay time in comparison with traditional approach in our retrospective study.

The Clinical Outcome of Perforator Based Sural Artery and Propeller Flaps in Reconstruction of Soft Tissue of Extremities

BACKGROUND

The reconstructive options for the soft tissues in extremities present serious challenges due to thin non-expendable soft tissues and predisposition to massive edema formation, thus frequently requiring flap cover. This study was undertaken to assess the outcome of a modified version of the sural artery flap with that of propeller perforator flaps for the reconstruction of lower extremities, particularly the heel defects.

METHODS

This prospective study was conducted on 40 consecutive patients, of which 20 treated with sural artery flap and another 20 with perforator based propeller flap cover for soft tissue reconstruction in extremities based on predefined inclusion criteria. The clinical outcome of the flap was assessed after three months.

RESULTS

Inclusion of the posterior tibial perforators (along with the sural artery and the peroneal artery) was shown to enhance the flap territory. The raising of the flap was quick with minimal blood loss and the modified flap had a wide arc of rotation for reconstruction of the heel defects. The younger patients regained sensation on the flap earlier, while the durability of the fasciocutaneous flap was excellent in the heel weight bearing areas. The success rate was 95% flap take.

CONCLUSION

Careful selection of the perforator and optimal designing of the flap result in favorable outcomes with the use of local perforator flaps for reconstruction in extremities. It provides predictable clinical outcomes with minimal donor site morbidity, is cost-effective, relatively easy technique and requires no special microsurgical setup or instruments.

Comparison of Reverse Sural Artery Flap Healing for Traumatic Injuries Above and Below the Ankle Joint

The reverse sural artery (RSA) flap is popular among trauma surgeons to cover the distal third of the leg to the foot. However, flaps that inset in the foot seem to have a high necrosis rate. This study compared the healing of RSA flaps performed for defects proximal to the ankle versus defects distal to the ankle. Patient data were collected retrospectively between January 2005 and December 2009. Eighty-five patients with the lower leg, ankle, and traumatic foot injuries were divided into 2 groups. Group 1 (49 patients) had RSA flap cover for soft tissue and bony defect proximal and up to the ankle joint line, and group 2 (36 patients) had RSA flap cover distal to the ankle joint line. The time to healing and type of healing were compared between the groups. The demographics between the 2 groups were similar. The successful RSA flap healing rate was 65% in group 1 (32 of 49) and 42% in group 2 (15 of 36). The average time to flap healing between the groups was similar (p = .16). Group 1 had predominantly primary healing compared with group 2 (p = .03). Group 2 had a higher reoperation rate for wound necrosis, which was significant (p = .001). The success of the RSA flap is higher when used for proximal to ankle joint line defects. Surgeons should be aware of the chances of flap necrosis when undertaking RSA flap cover distal to the ankle joint line.

The Clinical Outcome of Perforator Based Sural Artery and Propeller Flaps in Reconstruction of Soft Tissue of Extremities

BACKGROUND

The reconstructive options for the soft tissues in extremities present serious challenges due to thin non-expendable soft tissues and predisposition to massive edema formation, thus frequently requiring flap cover. This study was undertaken to assess the outcome of a modified version of the sural artery flap with that of propeller perforator flaps for the reconstruction of lower extremities, particularly the heel defects.

METHODS

This prospective study was conducted on 40 consecutive patients, of which 20 treated with sural artery flap and another 20 with perforator based propeller flap cover for soft tissue reconstruction in extremities based on predefined inclusion criteria. The clinical outcome of the flap was assessed after three months.

RESULTS

Inclusion of the posterior tibial perforators (along with the sural artery and the peroneal artery) was shown to enhance the flap territory. The raising of the flap was quick with minimal blood loss and the modified flap had a wide arc of rotation for reconstruction of the heel defects. The younger patients regained sensation on the flap earlier, while the durability of the fasciocutaneous flap was excellent in the heel weight bearing areas. The success rate was 95% flap take.

CONCLUSION

Careful selection of the perforator and optimal designing of the flap result in favorable outcomes with the use of local perforator flaps for reconstruction in extremities. It provides predictable clinical outcomes with minimal donor site morbidity, is cost-effective, relatively easy technique and requires no special microsurgical setup or instruments.

Versatility of the Extensor Digitorum Brevis Muscle Flap in Lower Limb Reconstruction

Supplemental Digital Content is available in the text.

Background:

Reconstruction of complex defects in the lower leg is a challenge. Although microvascular free tissue transfer is a popular technique, experience and available resources limit its use. Furthermore, free tissue transfer is not always required in the reconstruction of small lower leg defects, as many of them can be reconstructed with local alternatives such as an extensor digitorum brevis flap (EDB). Our aim was to describe our experience of the last 20 years with the EDB as a local muscle flap to cover small complex lower leg defects to establish its clinical feasibility and to document its associated complications.

Methods:

All adult patients who were operated with EDB flap reconstruction of the lower limb during 1997–2017 at the Department of Hand and Plastic Surgery, Linköping University Hospital, were included in this retrospective study.

Results:

Of 64 patients operated, only 7 had total flap failure, and the rate of complete success was 73% (47/64). Most of the skin defects were associated with fractures or complications thereof and were located in the ankle region, the dorsum of the foot, and the distal third of tibia or even the proximal tibia. Defects in the malleolar region and coexisting cardiovascular condition were factors associated with flap loss (either partial or total).

Conclusion:

The pedicled EDB-flap has, in our hands, proved to be a versatile and safe reconstructive option in the reconstruction of small defects in the lower leg and foot. Long-time follow-up is, however, recommended.

Thirteen-Year Follow-Up Reverse Sural Artery Flap for Plantar Calcaneal Wound: A Case Report

Reconstruction of soft tissue defects in the lower leg and foot after traumatic injury is a challenging problem owing to lack of locally reliable flaps. The traditional options for wound coverage often do not provide feasible or adequate treatment for many of these wounds. The lack of skin laxity in the lower leg and foot often make local flaps unavailable. Split-thickness skin grafts will not be robust enough. Free tissue flaps have a litany of potential complications and guaranteed comorbidities. The present case reinforces that appropriately selected patients with significant open bony and soft tissue trauma to the foot and ankle can be treated with a reverse sural artery fasciocutaneous flap. The reverse sural artery flap allows for full-thickness skin coverage with its own blood supply, maximizing the healing potential and should be considered a viable first option for soft tissue coverage.

Reduction of Morbidity With a Reverse-Flow Sural Flap: A Two-Stage Technique

The reverse sural flap has often been used for cutaneous coverage of the distal region of the leg and ankle. When the flap is performed in 2 stages, the vascular pedicle is exteriorized and later resected. Our goal was to assess the reverse sural flap performed in 2 stages regarding its viability and low morbidity along the flap-donor area. Eleven patients with cutaneous coverage loss found in the area between the distal third of the leg and ankle underwent cutaneous coverage surgery with a reverse-flow sural flap with an exteriorized pedicle, without violation of the skin between the base of the flap pedicle to the margin of the wound. After a minimum period of 15 days with flap autonomy, the pedicle was resected. The flap dimensions, its viability before and after the pedicle ligature, and the distance from the intact skin between the flap base and the margin of the wound were evaluated. Any losses were measured as a percentage of the total flap size. The respective length and width of the flap were a mean average of 7.45 cm × 4.18 cm. All the flaps survived. Partial loss of the flap occurred in 3 patients, ranging from 20% to 30%. The mean average distance of the intact skin between the pedicle base and the margin of the wound was 5.59 (range 4 to 8) cm. Our results showed that the 2-stage reverse sural flap ensures good flap survival and low morbidity.

Sural Flap Use for the Treatment of Wounds With Underlying Osteomyelitis: Graft Size a Predictor in Outcome, a Systematic Review

The sural flap procedure is a versatile technique that can be used to cover many types of defects about the lower extremity. The management of soft tissue defects of the lower extremity with underlying osteomyelitis is difficult. The goal for any of these patients is to create a biomechanically stable foot for weight-bearing purposes with no continued infection. Data were gathered using multiple databases from the years 2000 to 2016. Data were compiled looking at the number of subjects, age, comorbidities, number of complications, number of failures, and average flap size of complications/failures. A total of 110 patients were gathered using 5 separate articles. Twenty-two of the 110 patients had short-term complications. Flap failure was seen in 9/110 patients. A significant difference was noticed in flap size between flap failure and complication groups and nonfailure groups. The average flap size of patients who had some form of complication or failure was 51.87 cm² in size. The average graft size for patients without complications during their recovery was 36.54 cm². Within our study, the failure rate of 8.9% and complication rate of 13.7% are consistent with previous reports on sural perforator flaps. Last, with regard to the effect of flap size, there were significant differences between patients with a successful outcome and those who experienced complications or failures.

LEVELS OF EVIDENCE

Therapeutic, Level III: Systematic review.

Extensor Digitorum Brevis Flap for the Coverage of Ankle and Dorsal Foot Wounds: A Technical Trick

Soft tissue wounds overlying the dorsum of the foot and ankle are difficult to treat, and historically have been treated with free tissue transfer. Advances in surgical technique have expanded the use of pedicle perforator flaps to avoid free tissue transfer in certain situations. The authors describe a technique for using an extensor digitorum brevis flap to provide soft tissue coverage for wounds of the ankle and foot. In the senior authors' experience, the use of this flap has achieved wound coverage in 100% of patients with smaller wounds (≤45 cm) of the ankle.

The Reverse Superficial Sural Artery Flap Revisited for Complex Lower Extremity and Foot Reconstruction

Background:

Soft-tissue defects of the distal lower extremity and foot present significant challenges to the reconstructive surgeon. The reverse superficial sural artery flap (RSSAF) is a popular option for many of these difficult wounds. Our initial experience with this flap at multiple institutions resulted in a 50% failure rate, mostly because of critical venous congestion. To overcome this, we have modified our operative technique, which has produced a more reliable flap.

Methods:

All patients reconstructed with an RSSAF between May 2002 and September 2013 were retrospectively reviewed. In response to a high rate of venous congestion in an early group of patients, we adopted a uniform change in operative technique for a late group of patients. A key modification was an increase in pedicle width to at least 4 cm. Outcomes of interest included postoperative complications and limb salvage rate.

Results:

Twenty-seven patients were reconstructed with an RSSAF (n = 12 for early group, n = 15 for late group). Salvage rate in the early group was 50% compared with 93% in the late group (P = 0.02). Postoperative complications (75% vs. 67%, P = 0.70) were similar between groups. Venous congestion that required leech therapy was 42% in the early group (n = 5) and 0% in the late group (P = 0.01).

Conclusions:

Venous congestion greatly impairs the survival of the RSSAF. A pedicle width of at least 4 cm is recommended to maintain venous drainage and preserve flap viability.

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.

Reverse sural fasciocutaneous flap with a cutaneous pedicle to cover distal lower limb soft tissue defects: experience of 109 clinical cases

Background

Soft tissue defects over the mid- and distal third tibia, heel, dorsum and plantar aspect of the foot and over the medial, lateral and posterior aspect of the ankle are a common scenario in clinical orthopaedic practice. In this article, we describe the utility of the reverse sural fasciocutaneous flap with a cutaneous pedicle in 109 clinical cases with distal lower limb soft tissue defects.

Materials and methods

A total of 109 patients were operated on for moderate (5–15 cm) and large (more than 15 cm) soft tissue defects at various sites along the lower limb including foot, heel and sole with the reverse sural fasciocutaneous flap. The defects were secondary to trauma (61 cases), diabetic ulcers (12 cases), post-traumatic scar contracture (8 cases), venous ulcer (4 cases), wound dehiscence (10 cases), leprotic non-healing ulcer (1 case), post-infective wound (1 case), radiation-induced ulcer following radiotherapy for synovial cell sarcoma (1 case), post-fibromatosis excision (1 case), post-dermatofibrosarcoma excision (1 case), post-heel melanoma excision (1 case) and actinomycosis foot (1 case). Patients were assessed for flap uptake and healing of defects.

Results

Among the 102 cases analysed, 81 were male and 21 female with an average age of 32.7 years. The average size of the flaps was 148.10 ± 59.54 cm². The flap healed uneventfully in 89.21 % of patients. Edge necrosis occurred in 9 cases. Donor site regrafting was required in 7 patients.

Conclusion

The reverse sural fasciocutaneous flap with a cutaneous pedicle is a quick, versatile, easy and safe soft tissue defect coverage technique to cover most of the soft tissue defects of the lower limb in common orthopaedic practice and does not require any microvascular repair, though it may be cosmetically unappealing in a few cases.

Level of evidence

IV (Case series)

Distally based perforator flaps for reconstruction of post-traumatic defects of the lower leg and foot. A review of the anatomy and clinical outcomes

STUDY AIMS

To report the surgical anatomy of the perforator arteries at the lower leg, analyse clinical outcomes in previous studies, and forward methodological recommendations for future studies of post-traumatic perforator flap reconstructions.

METHODS

A study sample of 640 human patients drawn from 24 clinical reports was included for review. The sample comprised of four subsets: sural flap reconstructions (n=257), saphenous flaps (n=122), supramalleolar flaps (n=92), and propeller flaps (n=169).

RESULTS

Statistical analysis of samples from anatomical studies documents significant differences in the perforator distribution from the tibial and peroneal artery; peroneal perforator arteries are randomly organised whereas tibial artery perforators are clustered at three definite levels. The failure rates in clinical studies ranged from 0% to 6%, being lowest for supramalleolar flap reconstructions and highest for saphenous flaps; however, differences between the four subsets were not statistically significant at the 95% confidence level. Due to methodological flaws, outcome comparisons in the actual study sample should be interpreted cautiously; in most clinical studies both risk variables and outcome indicators are poorly defined. The outcome of Dynamic Infrared Thermography imaging of post-transposition changes of flap perfusion is reported.

SUMMARY

Fasciocutaneous perforator flaps seem to have high survival rates and represent a feasible approach to post-traumatic reconstructions, especially in low-resource settings. A template for data gathering is recommended for higher accuracy in future comparative studies, and for scientific analysis of success and risk factors. New imaging techniques indicate a promising potential of micro-circular angiogenesis during the first two weeks after flap transpose.

Risk factors associated with complications in lower-extremity reconstruction with the distally based sural flap: a systematic review and pooled analysis

The distally based sural fasciocutaneous flap is one of the few options available for local flap reconstruction of soft-tissue defects in the lower one-third of the leg. Few studies have assessed risk factors associated with poor outcomes in this flap. A literature search was performed of MEDLINE, EMBASE, CINAHL and the Cochrane Library for articles evaluating the use of sural artery fasciocutaneous flaps for soft-tissue reconstruction of the leg. Data were pooled and a univariate analysis was performed to identify characteristics associated with increased morbidity. A logistic regression model was created, and odds ratios and p values associated with the development of complications were calculated. Sixty-one papers were identified which included data on 907 patients. The majority of sural flaps were used to cover defects of the heel (28.2%), foot (14.4%) or ankle (25.8%). Trauma was the most common indication, followed by ulcers and open fractures. Flap complications were recorded in 26.4% of cases with a flap loss rate of 3.2%. With multivariate analysis, venous insufficiency and increasing age were independent risk factors for complications. Patients with venous insufficiency had nine times the risk of developing a complication compared to patients without venous insufficiency.

A minimally invasive modified reverse sural adipofascial flap for treating posttraumatic distal tibial and calcaneal osteomyelitis

Our aim was to report a modified reverse sural adipofascial flap for treating posttraumatic distal tibial or calcaneal osteomyelitis. We retrospectively reviewed the records of 15 patients with posttraumatic distal tibial or calcaneal osteomyelitis treated with modified reverse sural adipofascial flaps between 2005 and 2010. The flap was raised through 2 short incisions in the posterior aspect of the lower leg. The raw surface of the flap was covered with a full-thickness skin graft. Donor sites were closed primarily. Lower Extremity Functional Scale (LEFS) scores and 2-point discrimination (TPD) were recorded preoperatively and postoperatively. There were 12 males and 3 females, with an average age of 39 years (range = 18-55 years). Twelve lesions were in the distal tibia and 3 in the calcaneus. The flap ranged in size from 11 × 5 cm to 16 × 7 cm. All flaps survived, and skin grafts healed without complications. Recipient sites had an anatomic contour, and all patients were able to ambulate without the assistance of special shoes or orthoses. No infections recurred, and no ulcers of the grafted skin occurred with the regular wearing of shoes. The follow-up duration was 18.7 ± 6.8 months (range = 12-36 months). The mean LEFS score increased from 22.4 ± 8.3 preoperatively to 53.0 ± 11.2 postoperatively (P = .001). TPD markedly recovered at 24 months postoperatively. The modified reverse sural adipofascial flap provides good outcomes in treating distal tibial and calcaneal osteomyelitis with minimal donor site morbidity.

Increasing the success of reverse sural flap from proximal part of posterior calf for traumatic foot and ankle reconstruction: patient selection and surgical refinement

In this report, we present our experience on the use of the reverse sural flap for traumatic foot and ankle reconstruction. The patient selection and surgical refinement are discussed. From 2007 to 2010, 11 consecutive patients underwent modified reverse sural flap at the Chang Gung Memorial Hospital. The defects were located at the ankle (three cases), foot (two cases), and heel (six cases). Particular attention was paid to precise patient selection and surgical refinements. Patient selection was based on the lower limb vascular status by palpable distal pedal pulses and ankle brachial index ranging from 0.9 to 1.2. Surgical techniques were refined as precisely locating the perforators of peroneal artery, placing the skin paddle in upper third of leg for a distal region coverage, designing a 7-cm-wide adipofascial pedicle with a 2 cm skin paddle on it, preserving the mesentery structure of sural nerve and concomitant artery with or without including gastrocnemius muscles cuff, no tunneling when inset this flap and supercharging with lesser saphenous vein whenever needed. All the flaps survived completely. Only one patient required immediate anastomosis of lesser saphenous vein to local vein around defect in order to relieve the venous congestion during operation. Patients felt diminished but adequate recovery of sense of touch and temperature at the flap. Following the precise patient selection and surgical refinements, the modified reverse sural flap seemed to be a reliable and effective local flap for reconstruction of the soft tissue defects on ankle and foot.

Modified distally based sural adipofascial flap for reconstructing of leg and ankle

BACKGROUND

While free flaps can be used in many cases to cover soft tissue defects in the distal leg and ankle in a single stage, factors such as diabetes and advanced age can interfere with success of vascular anastomoses.

METHODS

Twenty-five patients with deep tissue exposure of the distal leg and ankle underwent reconstruction with a modified reverse sural adipofascial flap. Seventeen cases were due to trauma (13 due to high velocity trauma). All 17 had anterior tibial soft tissue defects without significant rear calf soft tissue injury. Eight patients had iatrogenic soft tissue defects due to orthopaedic surgeries for fractures. The flap is raised through two small incisions (3-5 cm) in the posterior aspect of the leg and the subcutaneous fat is split such that some is preserved with the skin. Once the flap is in place, it is covered by a full-thickness skin graft and the donor site is closed primarily.

RESULTS

Twenty-one flaps survived. Four had partial loss of the skin graft on the flap, which healed spontaneously without secondary resurfacing. Anatomic contour was obtained in the recipient sites of all 25 patients. All donor sites healed primarily with the preservation of protective sensation in the calf and acceptable aesthetic appearance. Numbness in the lateral dorsal foot improved gradually and only minor residual numbness was noted at 1 year postoperatively.

CONCLUSIONS

The modified reverse sural adipofascial flap preserved the sensation of the donor site and the anatomic contour of both recipient and donor sites.

The reverse sural artery flap for the reconstruction of distal third of the leg and foot

Soft tissue defects around the distal third of the leg and the foot present a major reconstructive challenge. There is limited expertise with free tissue transfers in many developing countries, necessitating consideration of other options for the closure of such defects. The versatility and reliability of sural artery flap have made it an emerging popular option for the reconstruction of such defects. Twenty patients comprising of 13 males and 7 females with soft tissue defects of the lower third of the leg and foot requiring soft tissue cover were treated between January 2006 and December 2010. The age range was 7-58 years with a mean age of 30 years. Nineteen (95%) of the defects were post-traumatic while one (5%) was post-infective. All the defects were covered with reversed sural artery flaps, which were raised on the posterior aspect of the junction of the upper and middle third of the leg. The smallest flap was 4 × 4 cm(2) while the largest measured 20 × 12 cm(2). The donor defect was closed directly in 7 (35%) patients, while split skin graft was applied in the remaining 13 (65%) patients. There was satisfactory flap healing in 17 patients (85%), while 3 patients (15%) had complete flap necrosis. Two of these patients had significant comorbidities of haemoglobinopathy and poorly controlled diabetes mellitus. Sural artery flap remains a viable option for the reconstruction of soft tissue defects of the distal third of the leg and foot. Caution should, however, be exercised in patients with some significant systemic diseases.

Sural nerve preservation in reverse sural artery fasciocutaneous flap-a case report

Background

The reverse sural artery flap is a generally accepted means of soft tissue reconstruction for defects of the distal third of the legs. The routine sacrifice of the sural nerve with its consequential temporary loss of sensation on the lateral aspect of the foot can be of concern to early rehabilitation of some patients.

Method

This is a case report of a 24 years old male who had Gustillo and Anderson type IIIB injury involving the upper part of the distal 3^rd and the middle 3^rd of tibia. A reverse sural artery flap was raised without transecting the sural nerve to cover the distal part of the defect.

Result

The distal part of the exposed bone was covered with the reverse sural artery flap without loss of sensation at anytime to the lateral part of the foot.

Conclusion

The reverse sural artery flap can be raised to cover the upper portion of the distal leg without severing the sural nerve.

Reverse peroneal artery flap for large defects of ankle and foot: A reliable reconstructive technique

Background:

Large soft tissue defects around the lower third of the leg, ankle and foot always have been challenging to reconstruct. Reverse sural flaps have been used for this problem with variable success. Free tissue transfer has revolutionised management of these problem wounds in selected cases.

Materials and Methods:

Twenty-two patients with large defects around the lower third of the leg, ankle and foot underwent reconstruction with reverse peroneal artery flap (RPAF) over a period of 7 years. The mean age of these patients was 41.2 years.

Results:

Of the 22 flaps, 21 showed complete survival without even marginal necrosis. One flap failed, where atherosclerotic occlusion of peroneal artery was evident on the table. Few patients had minor donor site problems that settled with conservative management.

Conclusions:

RPAF is a very reliable flap for the coverage of large soft tissue defects of the heel, sole and dorsum of foot. This flap adds versatility in planning and execution of this extended reverse sural flap.

Distally‐based sural flap for reconstruction of the lower leg and foot

A distally-based sural flap was used in four patients with soft-tissue defects in the lower leg and foot. All flaps survived completely without venous congestion. To make safe use of this flap it is important to include both the sural nerve and the lesser saphenous vein in the flap. It also seems to be important to include the surrounding fatty tissues in the pedicle and to avoid compression at the point of its angulation. This flap has the advantages that it is quick and easy to raise, and the reconstruction can be done in a single operation. It is unnecessary to sacrifice the major arteries in the leg, although the sural nerve must be sacrificed. In general this type of reconstruction of the lower leg and foot is beneficial in cases similar to those presented here.

The use of a reverse flow sural fasciocutaneous flap in a patient with multiple trauma: a case report

Provision of soft-tissue coverage for defects in the distal leg and foot is a challenge, especially in patients with multiple injuries and major soft-tissue defects. Major flap reconstruction requires expertise and the results are variable, with high morbidity. We report a case in which a reverse flow sural fasciocutaneous flap was used for treatment of an open fracture-dislocation of the right ankle after repeated debridement in a 64-year-old man with a history of chronic smoking, diabetes mellitus, and hypertension.

Neurocutaneous sural flap in paraplegic patients

Neurocutaneous flaps have been demonstrated to be a reliable option in different groups of patients but it remains unclear if distally-based sural flaps can be safely used in paraplegic patients because they suffer from significant nervous system alterations. The aim of this proof-of-concept study is to demonstrate that these flaps are reliable in paraplegic patients. We prospectively analysed a group (n=6) of paraplegic patients who underwent reversed sural flap surgery for ulcers on the lateral malleolus. Measurement of area and photographic documentation techniques have been employed to quantify the defect area. Sural nerve biopsies have been analysed histologically with several different staining techniques to assess the neurovascular network and the myelinisation of the nerve. The patients showed uneventful wound healing, except one case that suffered a partial flap necrosis that healed by secondary intention. Histologic analysis revealed an intact neurovascular network and myelinated nerve fibres. In this small series of paraplegic patients that underwent a distally-based sural flap, the complication rate was low, with only one case of superficial partial necrosis demonstrating the reliability and safety of the flap in this subset of patients. Histologic evaluation of sural nerve biopsies revealed an almost normal morphology. A possible explanation of this phenomenon is that the dorsal root ganglia remain intact in paraplegic patients and can preserve neural characteristics in the peripheral sensory nerve system.

The proximally-based sural artery flap for coverage of soft tissue defects around the knee and on the proximal third and middle third of the lower leg: 10 patients followed for 1-2.5 years

BACKGROUND AND PURPOSE

There have been few reports regarding the proximally based sural artery flap, which is useful for reconstruction of soft tissue defects around the knee and on the proximal third and middle third of the lower leg. Here we report our experience with 10 patients.

PATIENTS

The defects in our 10 cases were around the knee (4), on the proximal third of the lower leg (4), and on the middle third (2). 8 patients had fasciocutaneous flaps and 2 had adipofascial flaps. The flap size ranged from 4 to 10 cm in length, and from 5 to 8 cm in width. The pedicle length ranged from 12 to 20 cm.

RESULTS

All 10 flaps survived. Congestion and tip necrosis occurred in 1 case with a fasciocutaneous flap, which healed without complications. A superficial infection occurred in 1 case with a fasciocutaneous flap, which healed with antibiotic treatment. Necrosis of grafted skin occurred in 2 cases of adipofascial flap; only one of them, however, required additional surgery. No morbidity of the donor site and no functional deficits were detected in any of the 10 cases.

INTERPRETATION

The proximally based sural artery flap is useful for reconstruction of soft tissue defects around the knee joint and on the proximal third and middle third of the lower leg. It is a relatively easy and reliable procedure.

Distally based fasciocutaneous sural flap for foot reconstruction: a retrospective review of 10 years experience

BACKGROUND

The treatment of soft tissue defects of the foot is a problem mainly connected to the thickness of the coverage tissues, to the poor circulation, and to the frequent involvement of muscle, tendon, and bone. The authors present their experience with the sural flap, also in some particular cases.

MATERIALS AND METHODS

The authors treated 33 patients for small- and medium-size defects of the foot, caused by work, home, and road accidents, and by venous or diabetic ulcers. In all cases, the flap was cut in its fasciocutaneous variant; an extension of the sole portion of fascia was added in 5 patients. The flap was transferred under a subcutaneous tunnel in 10 cases, with an open incision in 20 cases, and in 3 cases the pedicle was kept external for 4 weeks, then resected.

RESULTS

One patient showed a complete necrosis of the flap and another showed a superficial necrosis preserving the deep fascia; in the remaining 31 cases, the flap incorporated without any major complication. The flap provided proper coverage of the defects from both an aesthetic and functional point of view as evidenced clinically and through a baropedographic test.

CONCLUSION

The advantages of this flap include: dissection is fast and easy, it is not necessary to sacrifice important arterial pedicle or muscular units as it can be used in traumatized limbs without further damage to main arteries, and a wide rotation arc is possible. Disadvantages include the sacrifice of the sural nerve and the covering of the donor region with skin grafts.

Diabetic foot ulcers — a comprehensive review

As the incidence of diabetes mellitus is increasing globally, complications related to this endocrine disorder are also mounting. Because of the large number of patients, foot ulcers developing in the feet of diabetics have become a public health problem. The predisposing factors include abnormal plantar pressure points, foot deformities, and minor trauma. Vulnerable feet usually already have vascular insufficiency and peripheral neuropathy. The complex nature of these ulcers deserves special care. The most useful prognostic feature for healing remains the ulcer depth, ulcers heal poorly if they clearly involve underlying tendons, ligament or joints and, particularly, when gangrenous tissue is seen. Local treatment of the ulcer consists of repeated debridement and dressing. No 'miraculous' outcome is expected, even with innovative agents like skin cover synthetics, growth factors and stem cells. Simple surgery like split skin grafting or minor toe amputations may be necessary. Sophisticated surgery like flap coverages are indicated for younger patients. The merits of an intact lower limb with an abnormal foot have to be weighed against amputation and prosthesis in the overall planning of limb salvage or sacrifice. If limb salvage is the decision, additional means like oxygen therapy, and other alternative medicines, might have benefits. The off-loading of footwear should always be a major consideration as a prevention of ulcer formation.