Cosmetic Reconstruction of the Digits in the Hand by Composite Tissue Grafting

Advances in Pediatric Toe Transfers

Microsurgery is undoubtedly the pinnacle of hand surgery. Significant advancement in recent years has stretched the indications for toe-to-hand transfer in both acquired and congenital hand defects to restore function, esthetics, and motion, with minimal morbidity to the donor site. There is no one fixed microsurgical transfer technique but a surgeon's versatility and innovation in using what one could spare because each case is unique. Esthetic refinements and reducing donor site morbidities have taken a front seat in recent years. We present a few cases to put forward the senior author's preferred techniques with this objective in mind.

The Role of Microsurgery in Coverage of Defects of the Hand

Soft tissue defects of the hand may result from trauma, infection, vascular disease, and after resection of tumors. Microsurgery has evolved to a stage where it is relatively commonplace today but procedures such as free flaps still incur significant time, manpower, cost, and material resources. The aim of this article is to articulate the specific situations in hand reconstruction when microsurgery is superior to nonmicrosurgical reconstructive options. The benefits of microsurgical reconstruction include a variety of important metrics, such as improved function, better tissue match, less donor site morbidity, and reduced downtime for the patient.

Compound or Specially Designed Flaps in the Lower Extremities

Novel and combined tissue transfers from the lower extremity provide new tools to combat soft tissue defects of the hand, foot, and ankle, or fracture nonunion. Flaps can be designed for special purposes, such as providing a gliding bed for a grafted or repaired tendon or for thumb or finger reconstruction. Propeller flaps can cover soft tissue defects of the leg and foot. In repairing severe bone and soft tissue defects of the lower extremity, combined approaches, including external fixators, one-stage vascularized bone grafting, and skin or muscle flap coverage of the traumatized leg and foot, have become popular.

Microsurgical Tissue Transfer in Complex Upper Extremity Trauma

Microsurgical tissue transfer may provide reconstructive option for extensive loss of tissues due to upper extremity trauma or tumor resection. This article reviews the authors' experience in using microsurgical tissue transfers for reconstruction of upper extremity trauma.

Aesthetic Reconstruction of Fingers and Thumbs With the Vascularized Half-Big Toenail Flap With Minimum Donor Site Morbidity

Purpose

The vascularized half–big toenail flap is a short-pedicle free vascularized flap approximately 30 mm in size that contains a fibular half-nail with a 5-mm skin edge and the partial distal phalanx bone. The fingertip skin of the amputated finger is reflected to cover the skin deficiency. The sensation and function are maintained at the donor site, and primary wound closure of the donor site is possible. This study aimed to evaluate the clinical outcomes of thumb and finger reconstruction operations performed using this flap.

Methods

We assessed 16 patients (19 digits) with digit amputation who underwent this procedure. We evaluated the following parameters: reconstructed digits, amputation level, survival rate, period until bone union, elongated length, morphologic indices, feeding artery, vein distribution, static 2-point discrimination, and patient occupation. We used the Michigan Hand Outcomes Questionnaire for the evaluation of the function and appearance of the arm.

Results

We reconstructed 3 thumbs and 16 fingers. No patients with zone I or V or palm amputation underwent surgery. Flap survival was obtained in all cases, including one atrophic case. Elongated length was 14.1 mm (range, 0–30 mm). The width and longitudinal/axial convexity of the transferred nail increased and the length decreased, whereas the width of the donor site nail increased at final follow-up. Reasonable sensation of the flap was obtained. The feeding artery was the plantar digital artery in 15 toes, the branch in 1, and the arterial anonymous vessel in 3. We could harvest the vein in the first web in 16 toes. All patients went back to their former jobs.

Conclusions

The aesthetic and functional outcomes of the reconstructed thumbs and fingers significantly improved. Donor site functional morbidity was minimum. Nevertheless, patients’ expectations regarding the reconstructed digit seemed to be that of an intact digit.

Type of study/level of evidence

Therapeutic IV.

Compound or Specially Designed Flaps in the Lower Extremities

Novel and combined tissue transfers from the lower extremity provide new tools to combat soft tissue defects of the hand, foot, and ankle, or fracture nonunion. Flaps can be designed for special purposes, such as providing a gliding bed for a grafted or repaired tendon or for thumb or finger reconstruction. Propeller flaps can cover soft tissue defects of the leg and foot. In repairing severe bone and soft tissue defects of the lower extremity, combined approaches, including external fixators, one-stage vascularized bone grafting, and skin or muscle flap coverage of the traumatized leg and foot, have become popular.

Evaluation of sensory function and recovery after replantation of fingertips at Zone I in children

Sensory function is the most significant criterion when evaluating the prognosis of replanted fingers. Current clinical research has focused on surgical techniques and indications for finger replantation; however, few studies have focused on recovery of finger sensory function after replantation. This study retrospectively assessed data of eight patients who had undergone nine Zone I replantations of the fingertips in the First Affiliated Hospital of Sun Yat-sen University of China from July 2014 to January 2016. Variations in the extent of damage, with the residual vessels or nerves in some fingers being too short or even missing, prevented tension-free suture repair in some patients. Thus, repair of four of the nine fingertips included arteriovenous anastomosis, the remaining five undergoing arterial anastomosis during replantation of the amputated fingers. Three patients underwent nerve repair, whereas the remaining six cases did not. Fingertip replantations were successful in all eight patients. Compared with the patients without vascular anastomosis, no obvious atrophy was visible in the fingertips of patients who did undergo vascular anastomosis during replantation and their sensory function did recover. Fingertip replantation provides good sensory function and cosmetic outcomes when good artery and vein anastomoses have been created, even when digital nerves have not been repaired.

Free toe pulp flap for finger pulp and volar defect reconstruction

BACKGROUND

Fingertip injury requiring flap cover is very common in the modern era. The ideal cover should fulfill both functional and aesthetic improvement.

MATERIALS AND METHODS

From June 2015 to April 2016, we performed seven free toe pulp flaps for finger defect reconstruction. All patients were males. Five flaps were done in emergency post-traumatic cases, and two were done in elective set up. The cases included reconstruction of three thumbs, one index and one ring finger in an emergency set up and two ring fingers in the elective. Thumb reconstruction was done with great toe lateral pulp and the other digits reconstructed with second toe pulp flap. Follow-up evaluation included both functional and aesthetic assessment.

RESULTS

Five flaps survived completely, one suffered partial loss, and one flap failed completely. The median follow-up period was 9 months. The median duration of surgery was 255 min (range 210 to 300 min). The median two-point discrimination was 6.5 mm (range 4-8 mm). There was the return of temperature sensation in all patients; two had cold intolerance. The Semmes-Weinstein monofilament score varied from 3.61 to 5.07 (median filament index value 4.31/pressure value of 2 g/mm2). Three patients had delayed donor site wound healing.

CONCLUSIONS

The free toe pulp flap is an efficient choice for fingertip and volar finger defects reconstruction with an excellent tissue match.