Novel Design of the Chimeric Deep Inferior Epigastric Artery Perforator Flap that Provides for Three-Dimensional Reconstruction of Composite Tissue Defects of the Heel in Children

Clinical effect of free chimeric anterolateral thigh flap and chimeric thoracodorsal artery perforator flap in chronic osteomyelitis

BACKGROUND

Chronic osteomyelitis poses a formidable challenge for orthopedic practitioners in clinical practice. Chimeric perforator flap is a commonly used repair method for chronic osteomyelitis. The purpose of this study was to compare the clinical efficacy of chimeric anterolateral thigh flap (C-ALTP) and chimeric thoracodorsal artery perforator flap (C-TDAP) for the treatment of chronic osteomyelitis.

METHODS

A retrospective analysis was performed on patients with chronic osteomyelitis of the lower extremity who underwent two kinds of treatment with chimeric perforator flaps from January 2014 to March 2022. The preoperative basic data and the operative and postoperative basic information of the two groups were collected and statistically analyzed.

RESULTS

Sixty-six patients were included in this study, and both groups achieved satisfactory aesthetic and functional results. Intraoperative results showed that the intraoperative blood loss and flap acquisition time in the C-TDAP group were less than those in the C-ALTP group. The incidence of postoperative complications in the donor and recipient sites in the C-TDAP group was significantly lower than that in the C-ALTP group, which led to a high reoperation rate in the C-ALTP group. Long-term follow-up showed that the wound healing time and weight-bearing walking time in the C-TDAP group were less than those in the C-ALTP group.

CONCLUSIONS

Chimeric perforator flaps can effectively be used to treat osteomyelitis with composite tissue defects, eliminate inflammation of the affected limbs, and promote wound healing. However, C-TDAP flaps have more reliable healing effects on wounds and donor sites, and have fewer complications.

LEVEL OF EVIDENCE

III, Case-control study.

Reconstruction of the extensor tendon on the dorsal pedis with a chimeric skin-aponeurosis flap from the groin region

BACKGROUND

Complex defects involving the extensor tendon on the dorsal pedis have been reconstructed using multiple procedures. Skin coverage and tendon transfers have also been performed. This study aimed to present our experience using a chimeric skin-aponeurosis flap for one-stage reconstruction of composite soft-tissue defects on the dorsal pedis.

METHODS

Between May 2017 and September 2020, 12 patients with these defects received total treatment using a chimeric groin flap. Based on the superficial circumflex iliac vessels, the skin paddle resurfaced the cutaneous defect, and the vascularised external oblique aponeurosis was rolled to form a tendon-like structure to simultaneously replace the absent segment of the extensor tendons. A suitable "Y" bifurcation was dissected to enlarge the vessel diameter. Single-stage reconstruction was performed using a set of vascular anastomoses at the recipient site.

RESULTS

Flap survival was achieved without significant complications. The hammertoe deformity was completely removed. The average dimension of the skin paddle was 8.0 × 13.0 cm (range, 6.5 × 11.0-10.0 × 14.0 cm), and the mean size of the aponeurosis was 8.0 × 4.0 cm (range, 6.0 × 3.0-10.0 × 5.0 cm). At the last follow-up visit, no morbidity was observed at the donor site. Natural shapes and walking functions were successfully achieved with a protective sensation.

CONCLUSION

The chimeric groin flap with sheets of external oblique aponeurosis is a great candidate for one-stage reconstruction of composite soft tissue loss on the dorsal pedis. This approach provides cosmetic coverage, allowing faster wound healing and reduced tendon adhesions.

Ortho-oncoplastic surgery in foot and ankle: A narrative overview on reconstruction of soft-tissue defects after oncologic resections

INTRODUCTION

Malignant tumors of the foot are rare, and treatment strategies are challenging considering the complex anatomy of this area. In recent years, dramatic advances in technology and collaborations between different specialties (such as orthopedic, oncology, radiology, plastic, and vascular surgery) significantly changed the approach to complex malignant tumors without resorting to limb removal. The combination of the strengths of both orthopedic surgery and plastic surgery constitutes the modern definition of "orthoplasty." The aim of this review article is to provide treatment strategies that are available for reconstruction of foot and ankle in limb-salvage surgery after tumor resection, with a specific focus on microsurgical techniques in plastic surgery.

METHODS

We conducted a comprehensive search for relevant papers across PubMed, Scopus, Embase, and Web of Science. We included patient-based studies reporting on procedures for soft-tissue reconstruction with small and large soft tissue defects. Indications, pros and cons, and technique tips are discussed for each type of reconstructive technique.

RESULTS

The search was done using literature of the past 30 years (from 1990 to date), resulting in about 725 articles describing over 2000 cases. Cutaneous flaps included lateral supramalleolar flap, medial plantar flap, reverse sural neurocutaneous island flap, medial leg flap, and lateral leg flap. Free flaps included anterolateral thigh flap, radial forearm flap, latissimus dorsi flap, gracilis muscle flap, lateral arm flap, and rectus abdominis flap.

CONCLUSIONS

The orthoplastic approach in musculoskeletal oncology is a collaborative model of orthopedic and plastic surgeons working together, resulting in a higher rate of successful limb salvage in patients at risk for amputation. Protocols, biologic substitutes, and surgical techniques are largely improved in the last decades increasing the possibility of functional reconstruction. Microsurgical strategies represent the new frontiers in these demanding reconstructions.

Pre-expanded thin DIEP free flap in pediatric upper extremity reconstruction for burn sequelae: A case report

Deep burns sequelae involving the upper limb are challenging even for experienced surgeons, mainly because local reconstructive options and donor sites are often compromised. The use of free flaps for this type of reconstruction remains difficult due to the small recipient vessel diameter and tendency to vasospasm. Moreover, pediatric cases bring the challenge to another level. We present the case of a 13-year-old girl presenting major retractile sequelae of the upper left limb, including complete wrist immobilization combining wrist hyper-extension, ulnar deviation deformity, and a ulno-carpal dislocation. She was referred to our department where a two-stage reconstruction was performed using a pre-expanded free deep inferior epigastric artery perforator (DIEP) flap. The first surgery consisted of placing two kidney-shaped expanders in a subfascial plane in the hypogastric region. Four months later, after a bi-weekly expansion, an excision of the scar tissue, and the DIEP flap transfer were completed. At the 12-month follow-up evaluation, both aesthetic and functional results were satisfactory, with a good contour and regained mobility of the wrist.

The versatile thoracodorsal artery perforator flap for extremity reconstruction: from simple to five types of advanced applications and clinical outcomes

BACKGROUND

Application of the thoracodorsal artery perforator (TDAP) flap is known to be a popular and reliable method for extremity reconstruction. This manuscript presents our clinical outcomes in reconstructing soft tissue defects using simple and advanced TDAP flaps.

METHODS

From 2013 to 2022, 53 patients with a mean age of 23 years (ranging from 2 to 72 years) underwent reconstructive surgery with different patterns of free TDAP flaps, including chimeric TDAP flaps, double skin paddle TDAP flaps, flow-through TDAP flaps, conjoined TDAP flaps, and microdissected debulking TDAP flaps.

RESULTS

All TDAP flaps survived. The size of the TDAP skin paddle ranged between 5 × 3 and 25 × 10 cm2. Primary closure of the donor site was achieved in all patients in the simple application group, and one patient in the advanced application group underwent partial skin grafting. Partial flap loss occurred in one case in the simple TDAP flap group and four cases in the advanced application group. There was one case of flap bulkiness and two cases of scar hyperplasia in the simple TDAP flap group. The mean follow-up duration was 11 months (4-46 months).

CONCLUSIONS

The free TDAP flap, with five types of advanced applications, makes it versatile for reconstructing different kinds of soft tissue defects of the extremities that can be used to achieve individualized defect reconstruction, minimize donor site morbidities, and an aesthetic appearance.

Successful Reconstruction of Complex Sacrococcygeal Defects Using Chimeric Perforator Propeller Flap

BACKGROUND

Complex soft tissue defects, which result from the surgical resection of sacral tumors, manifest as a combination of skin defects, dead space, infection, and prosthesis exposure. Because the traditional musculocutaneous flap lacks flexibility because of the close connection between the skin flap and the muscle component, the musculocutaneous flap is not suitable for reconstructing complex soft tissue defects where the dead space and skin defects are located at different sites. Furthermore, the perforator flap is also not appropriate for reconstructing complex defects because it lacks the muscular component. We considered the possibility of using the chimeric perforator propeller flap for reconstructing complex sacrococcygeal defects.

METHODS

This study included 7 patients who underwent, between July 2007 and July 2021, the reconstruction of complex soft tissue defects of the sacrococcygeal region using a chimeric perforator propeller flap.

RESULTS

Among the included cases, the etiologies were chordoma (n = 3), sacral tumor (n = 3), and squamous cell carcinoma (n = 1). In all the cases, vacuum-assisted closure therapy was used to treat wound infections before surgery. The average sizes of the skin and muscle flaps were 195.8 cm 2 (range, 100-350 cm 2 ) and 83.6 cm 2 (range, 60-140 cm 2 ), respectively. The superior gluteal artery was the source artery for the chimeric perforator propeller flap. The donor sites were primarily closed in all cases. One patient had delayed wound healing, and the secondary wound healed using conservative dressing changes. The other 6 flaps had no complications. The average follow-up time was 5.3 months (range, 1-9 months). Muscle weakness and compromised ambulation in the affected lower extremities were not observed in any of the patients. Furthermore, all 7 patients had no tumor recurrence, prosthesis exposure, and infection events in the sacrococcygeal region.

CONCLUSIONS

The chimeric perforator propeller flap may be an option for reconstructing complex soft tissue defects in the sacrococcygeal region.

Reconstruction of the severe Achilles tendon and soft-tissue loss with the bi-pedicled conjoined flap and vascularized fasciae latae: A consecutive case series of 15 patients

BACKGROUND

Historically, the segmental loss of the Achilles tendon with overlying soft-tissue defects had been frequently reconstructed with the composite anterolateral thigh (ALTP) flap, including the iliotibial tract or fasciae latae. This study aimed to present our modified combination using the bi-pedicled conjoined flap with vascularized fasciae latae, for the approximately total reconstruction of the Achilles tendon and extensive soft tissue.

METHODS

From May 2015 to March 2018, 15 patients (9 male and 6 female) with a mean age of 36 years (ranged, 18-52 years) underwent microvascular Achilles tendon reconstruction. Harvested on the abdomen and groin, the conjoined flap was chimeric with the vascularized fasciae latae. Primary donor-site closure was accomplished in all patients. A standard assessment of the functional and esthetical outcomes was completed.

RESULTS

Mean follow-up time was 42 months (ranged, 32-48 months). The average dimension of the conjoined flap was 25 × 14 cm (ranged, 18 × 10-35 × 18 cm), and the average size of the folded fasciae latae was 15 × 6 cm (ranged, 12 × 5-25 × 8 cm). At the last follow-up, the Thompson test was negative in all patients. The mean American Orthopedic Foot and Ankle Society (AOFAS) score was 91.0. The mean Achilles tendon total rupture score (ATRS) was 18.5. The mean Vancouver Scar Scale (VSS) score was 3.0.

CONCLUSIONS

The composite bi-pedicled flap including vascularized fasciae latae provides an alternative approach with great functional and esthetic outcomes, in selected patients who suffered severe Achilles tendon and skin defects. The one-stage procedure facilitates better rehabilitation postoperatively.

[Application of deep inferior epigastric perforator flap for repair of extreme defects around knee]

OBJECTIVE

To investigate the effectiveness of the deep inferior epigastric perforator (DIEP) flap for extreme defects around the knee.

METHODS

Between June 2017 and December 2018, 15 patients with the extreme defects around the knee were admitted. There were 9 males and 6 females with a median age of 36 years (range, 23-51 years). The etiology was the traffic accident in 7 cases, tumor in 5 cases, and burn in 3 cases. The injured location was left knee in 8 cases and right knee in 7 cases. The size of soft tissue defects ranged from 15 cm×10 cm to 30 cm×20 cm, and all defects complicated with exposure of blood vessels, nerves, tendons, and other tissues. Transverse DIEP flaps with 1-2 vascular pedicles were prepared according to the size of the defect, including 6 cases of single-pedicle flaps and 9 cases of double-pedicle conjoined flaps. According to the depth of the defect, 10 cases of skin flaps were thinned under microscope. The size of the DIEP flaps ranged from 16 cm×10 cm to 32 cm×20 cm; the average thickness was 1.5 cm (range, 0.8-1.8 cm); the average pedicle length was 7.5 cm (range, 5.0-9.0 cm). The donor site was directly sutured.

RESULTS

One single-pedicle flap developed distal necrosis after operation, and healed after skin grafting; the other skin flaps survived, and the wounds at the donor and recipient sites healed by first intention. All patients were followed up 16-28 months (mean, 24 months). The shape and texture of the flap were satisfactory, and there was no abnormal hair growth or obvious pigmentation. There was only linear scar at the donor site and no complication such as abdominal hernia. The appearance and function of the knee were satisfactory. No recurred tumor was observed, and the scar contracture was released. At last follow-up, 13 cases were excellent and 2 cases were good, according to the Knee Society Score (KSS) criteria.

CONCLUSION

The DIEP flap is an ideal alternative for repairing the extreme defects around knee, with a concealed donor site, easy dissection, flexible design, as well as less complication.

[Application of lateral circumflex femoral artery chimeric flap to repair complex wounds of foot and ankle]

OBJECTIVE

To investigate the effectiveness of lateral circumflex femoral artery chimeric flap transplantation in repair of complex wounds of foot and ankle.

METHODS

A retrospective study was conducted to analyze the clinical data of 20 patients with complex wounds of foot and ankle treated with lateral circumflex femoral artery chimeric flap between June 2017 and June 2020. There were 14 males and 6 females with an average age of 42.8 years (range, 21-65 years). Among them, 8 cases had dorsalis pedis tendon defect with or without bone exposure, 4 cases had partial or total Achilles tendon defect without bone exposure, and 8 cases had deep cavity and bone exposure. The wound area ranged from 10 cm×6 cm to 21 cm×11 cm. The time from injury to operation ranged from 6 to 22 days, with an average of 9.4 days. The lateral femoral circumflex artery flap was used in 6 cases with fascia lata flap, 6 cases with rectus femoris aponeurosis flap, and 8 cases with lateral femoral muscle flap. The flap area ranged from 12.0 cm×6.5 cm to 35.0 cm×7.5 cm. All flap donor sites were sutured directly. The survival, appearance, texture, sensation of the flap, and complications of the donor site were observed. The foot and ankle function was evaluated by Kofoed score.

RESULTS

All patients were followed up 8-24 months (mean, 14.2 months). On the 3rd day after operation, 1 case had partial necrosis of 1 flap with fascia lata flap and healed after dressing change; 1 case of chimeric muscle flap developed venous crisis at 12 hours after operation; the chimeric flaps survived successfully in the other 18 patients and the wounds were primary healing. The color and texture of the flaps were good, the flaps recovered protective sensation. Only linear scar remained in the donor site of thigh. There was no sensory disturbance around the incision or walking disturbance. The Kofoed score of the foot and ankle function at last follow-up was 75-96, with an average of 89.8. Among them, 15 cases were excellent, 4 cases were good, and 1 case was qualified. The excellent and good rate was 95.0%.

CONCLUSION

The application of lateral circumflex femoral artery chimeric flap can accurately and stereoscopically repair the complex wounds of foot and ankle and achieve satisfactory effectiveness.