Medialis Pedis Flap in the Reconstruction of Palmar Skin Defects of the Digits: Clarifying the Anatomy of the Medial Plantar Artery

Medial Plantar Artery Perforator Kiss Flap for Salvage of Extensive Palmar Skin Defect

BACKGROUND

Flaps based on the medial plantar artery (MPA) accomplish favorable surgical outcomes in palmar resurfacing because of their outstanding texture, pliability, and contour, but primary closure cannot be achieved at the donor site when the flap is designed to be relatively large. In this study, the kiss technique was used for the reconstruction of extensive palmar defects, which minimized donor-site morbidity.

METHODS

A modified flap surgical strategy was systemically developed based on the perforator distribution of the MPA through a cadaver study. Two or three narrow, small skin paddles based on the MPA were raised and resembled at the recipient site as a larger flap. Static two-point discrimination, hypersensitivity and range of motion, QuickDASH, gait, and patient satisfaction were evaluated 6 months to 12 months after the operation.

RESULTS

From June of 2015 to July of 2021, 20 cases of reconstruction using the MPA perforator kiss flap were performed for the resurfacing of palmar skin defects. All flaps survived uneventfully, with coverage matching the texture and color of the recipients, except one flap that exhibited venous congestion and recovered after revision. Twelve flaps (60%) were double-paddled, and eight flaps (40%) were triple-paddled, with a resurfacing area of 27.19 cm 2 and 41.1 cm 2 , respectively. All donor sites achieved primary closure without major complications.

CONCLUSIONS

Versatile kiss flap combinations were developed based on further understanding of the MPA system. Durable and pliable characteristics of the MPA perforator flap provide excellent reconstruction for extensive palmar defects while minimizing donor-site complications.

CLINICAL QUESTION/LEVEL OF EVIDENCE

Therapeutic, IV.

Medial plantar artery perforator (MPAP) flap is an ideal option for reconstruction of complex soft tissue defect in the finger: Clinical experience from 11 cases

Introduction

Soft tissue defects of fingers are common in reconstructive plastic surgery, and reconstruction of the defects remains challenging for plastic surgeons. In our study, we reported our experience in finger reconstruction with a medial plantar artery perforator (MPAP) flap, especially using a lobulated MPAP flap for the complex multifinger soft defect.

Patients and methods

From the period April 2012 to October 2018, 11 patients (9 males and 2 females) with an average age of 44 years old (ranging from 11 to 58) received finger reconstruction with a free MPAP flap. In total, 11 flaps (8 single-lobulated flaps and 3 two-lobulated flaps) were raised from the ipsilateral or contralateral instep area. Trauma and scar contracture caused hand soft tissue loss in all cases.

Results

The sizes of the flaps ranged from 2×3 to 5×7.5 cm2. All flaps survived intact with no complications. One donor site was closed primarily, and other donor sites were covered with a full-thickness skin graft. The mean follow-up time was 6 months (ranging from 3 to 8 months). During the follow-up period, the patients were satisfied with their appearance without any traces of flap plastic surgery.

Conclusion

The MPAP flap is a reliable and acceptable option for the reconstruction of complex soft tissue defects in the finger. Depending on the two branches of the medial plantar artery, the use of the lobulated MPAP flap holds promise in the treatment of multifinger soft tissue defects.

One-stage coverage of multi-digital pulp defects with sensate flaps from the foot

BACKGROUND

The reconstruction of the digital pulp defects was a mix of the sensation, function, and aesthetics. As the conventional flaps became out of date, the sensate flaps were increasingly utilized in covering such defects. In this report, we present our experience with some novel flaps design, located on the foot.

METHOD

From April 2015 to September 2018, nine patients received the free sensate flaps to resurface soft tissue defects in the multi-digital pulps. And all flaps were harvested from each aspect of the foot, which dimensions were tailored to the defects. The cutaneous nerve was preserved within the flap. Standardized assessment of outcome in terms of sensory, functional, and esthetic scores of the reconstructed pulps was completed.

RESULTS

Nineteen flaps survived completely without significant complications, and mild venous congestion was observed in one flap. The free sensate flaps were performed for digital pulp reconstruction in 9 patients: 6 male and 3 female patients with a mean age of 49 years (ranged, 16 to 72 years). The defects involved 3 thumbs, 6 index fingers, 5 long fingers, 3 ring fingers, and 2 little fingers. All flaps were available for a mean follow-up of 30 months (ranged, 24 to 36 months). The functional and esthetic outcomes were satisfied for all flaps, as well as the sensory restoration.

CONCLUSION

The sensate flap from the foot is a remarkable alternative for digital pulp reconstruction with less morbidity and better outcomes. Furthermore, the foot region presents a sensitive, glabrous skin with the proper bulkiness and allows for easy dissection.

Restoring blood flow to the lateral plantar artery after elevation of an instep flap or medialis pedis flap

The instep flap and medialis pedis flap are both originate based on the medial plantar artery. The medialis pedis flap is based from the deep branch and the instep flap is based from the superficial branch. To increase the axial rotation, it is acceptable to ligate the lateral plantar artery. However, this can partially affect the blood supply of the plantar metatarsal arch. We restored the blood flow with a vein graft between the posterior tibial artery and the ligated stump. From 2012 to 2020, 12 cases of heel reconstruction, including seven instep flaps and five medialis pedis flaps, were performed with ligation of the lateral plantar artery. The stump of the lateral plantar artery was restored with a vein graft and between the posterior tibial artery and the ligated stump. Patients were followed for 18 months. Long-term results showed the vascular restoration of the lateral plantar artery remained patent demonstrated by doppler ultrasonography. Restoring blood flow to the lateral plantar artery maintains good blood supply to the toes. If the patient in the future develops a chronic degenerative disease, with microvascular complications, bypass surgery can still be performed because of the patency of both branches.

"Like For Like" Reconstruction of Heel Pad with Medial Plantar Artery Flap-Functional and Aesthetic Outcomes in A Series of 19 Cases

Heel pad loss can cause serious problems in weight-bearing and locomotion. The medial plantar artery (MPA) flap is a suitable “like for like” replacement. Nineteen patients whose heels were reconstructed with MPA flap between July 2015 and February 2020 were studied. All patients were assessed based on flap survival, functionality, and patient satisfaction. Loss of heel pad was due to diabetic ulcer (11), trauma (6), tumor (1), and unstable scar (1). The largest flap measured 9 × 7 cm. Sixteen flaps were done as fasciocutaneous flaps and three in combination with abductor hallucis muscle (AbdH). All the flaps survived. The average functional scores at 6, 12, 18, and 24 months were 86.86, 89.62, 89.38 and 97.33 based on AOSAS-AH score. Average patients' satisfaction was 8.7/10. To conclude, the MPA system is a versatile vascular axis providing “like for like” tissue for heel pad reconstruction which is reliable and durable.

Anatomical Study of the Medialis Pedis Flap and its clinical applications in Asian Singaporean Patients

PURPOSE

The purpose of this study was to revisit the medial plantar artery's anatomy and study its distribution for raising the medialis pedis flap. Several investigators have reported their clinical experience with the use of this flap for reconstruction of soft tissue defects of the hand. However, many have reported difficulty raising the flap due to variations in its arterial anatomy and the confusion that exists with respect to the nomenclature in our literature.

METHODS

This study was divided into 2 parts: an anatomic study and clinical application. In the anatomic study, 12 cadaveric feet specimens from 6 patients were injected with latex and barium-gelatin injections and the medial branch of the deep division of the medial plantar artery distribution was studied. We then described the use of a medialis pedis flap in four clinical cases to cover defects of the digits.

RESULTS

The anatomic study revealed that the average pedicle length of the deep division of the medial plantar artery was 1.94cm. In the four illustrative clinical cases where the flap was used, the average flap size was 4.5 × 3.75cm. Donor sites were either closed primarily or with skin grafts. The vessels used for this flap were the medial branch of the deep division of the medial plantar artery and venae commitantes, or subcutaneous veins which provided the superficial drainage. All flaps were successful without any significant complications. The study is novel in that it describes the anatomic variability of length of the medial branch of the deep division of the medial plantar artery that exits in nature.

CONCLUSIONS

This paper describes the medial branch of the deep division of the medial plantar artery and the anatomic variations that exist in the raising of the medialis pedis flap. We have shown how a medialis pedis flap is an ideal option for reconstructing soft tissue defects of the hand because of its texture, bulkiness and pliability in the context of like for like reconstruction.

Plantar forefoot reconstruction: A proposal of a management algorithm based on a case series analysis: Plantar forefoot reconstruction

BACKGROUND

Several loco-regional flaps have been described for plantar forefoot coverage. We, herein, report our single-centre experience in plantar forefoot reconstruction and propose a decision-making process based on the defect's size.

METHODS

This is a retrospective case series study of all patients who underwent plantar forefoot reconstruction in a 10-year period. We propose a treatment algorithm, based on the defect size. Defects are classified into small, moderate and large. Small defects (<10cm²) can be covered with the hemi-pulp toe flap. Patients with moderate defects (10-25cm²) can be treated with the reverse medial plantar artery flap (MPAF) from the instep area. For large defects (>25cm²), we recommend regional flaps, that is the distally based sural flap (DBSF) from the ipsilateral calf, or free flaps, such as the anterolateral thigh flap (ALT) or the skin-grafted gracilis flap.

RESULTS

The data of 51 patients were collected and analysed. The median age was 58 years (range 19-84). Nine patients had small defects and underwent hemi-pulp toe flap reconstruction. Three patients presented with moderate defects that were covered with reverse MPFs. The vast majority of the patients (39 patients) had large defects. Of these, eight cases were treated with DBSF and 31 cases with free flaps. Free flap transfers were successful in 97% of the cases. Overall complication rate was 25%.

CONCLUSION

We conclude that local flaps should be preferred in plantar forefoot reconstruction as they provide like-tissue for small to moderate defects, for large defects regional flaps or free flaps were indicated. A defect-based approach can facilitate the decision-making process.

Application of Digital Subtraction Angiography in Reconstruction of Plantar Forefoot With Reverse Medial Plantar Flap

ABSTRACT

The reverse medial plantar flap (RMPF) raised from the nonweight-bearing region of the plantar foot represents a viable option for the soft tissue defect in planter forefoot. The anatomical basis of RMPF is the complex anastomotic branches between medial plantar artery (MPA) and deep plantar arch. Those anastomotic branches have high variation rate and may be damaged by trauma such as electric injury. Therefore, it is very important to know whether those anastomotic branches are present and intact before harvesting RMPF. Five patients with soft tissue defect in planter forefoot were enrolled into the study. The digital subtraction angiography (DSA) was performed to evaluate the plantar hemodynamics in the ipsilateral foot. The RMPF was harvested only after the anastomotic connections between MPA and deep plantar arch was confirmed. Anastomosis between superficial branch of MPA and deep plantar arch was observed in all DSA examinations. All 5 patients received the repair of soft tissue defect in plantar forefoot with RMPF. All flaps survived completely. The DSA can effectively evaluate the blood supply basis of RMPF and provide imaging evidence for the design and harvest of the flap. The main anatomical basis of RMPF is the anastomotic connections between superficial branch of MPA and deep plantar arch.

Anterior tibial artery injury is not the contraindication of medial plantar flap: digital subtraction angiography evidence and clinical application

The medial plantar artery (MPA) is often sacrificed as the vascular pedicle of the medial plantar flap (MPF). However, for patients with ankle soft tissue defect caused by traffic accident, the anterior tibial artery (ATA) could be damaged and the blood supply of the distal foot would only come from the MPA and the lateral plantar artery (LPA). In this case, sacrificing the MPA for the MPF means that the LPA will become the mainly source of blood supply of the distal foot. Whether the blood supply of the distal foot is adequately guaranteed remains to be discussed. A total of seven patients with ankle soft tissue defect and ATA injury were enrolled in the study. The digital subtraction angiography (DSA) was performed to observe the hemodynamics of the ipsilateral foot. The MPF was harvested only when the foot arterial network consisting of the MPA, the LPA, the deep plantar arch, and the deep plantar artery of DPA, and the blood redistribution existed. DSA results showed the blood from the posterior tibial artery was redistributed to the ipsilateral foot and the MPA is not the dominant artery in the foot. Seven MPFs were harvested, and all flaps survived completely. No complications, such as pain, ulcer, and necrosis, occurred in the ipsilateral toes. The DSA could accurately and intuitively evaluate the hemodynamics of foot in patients with ATA injury. The DSA data and clinical practice proved that the ATA injury is not the contraindication of the MPF.

Medial Plantar Artery Flap for Wound Coverage of the Weight-Bearing Surface of the Heel

Covering soft tissue defects of the heel is particularly challenging because of the highly specialized functional units unique to the plantar fat pad and the shear and compressive forces experienced in this area. The medial plantar artery fasciocutaneous flap provides the unique ability to restore both sensation and the functional units to the plantar heel by taking tissue similar to that which was lost and relocating it from a non-weight-bearing portion of the foot, while maintaining minimal host morbidity. This provides a lasting solution and may prevent future ulcerations from occurring.

An ulnar parametacarpal perforator flap for volar digital soft tissue reconstruction

We present outcomes of using a perforator-based ulnar parametacarpal flap in 25 patients for digital pulp defects. These included 17 free transfers to the thumb, index, middle and ring fingers and eight reverse pedicled transfers to the little fingers. This flap includes a dorsal sensory branch of the ulnar nerve, which was sutured to the digital nerve in all transfers. Each flap had one to three reliable perforators (mean 0.44 mm diameter) to the ulnar parametacarpal region and contained at least one perforator within 2 cm proximal to the palmar digital crease. All the 25 flaps survived completely. Twenty-two patients were followed for 15 months (range 12 to 24), and three were lost to follow-up. The mean static and moving two-point discrimination of the flap was 7 mm and 5 mm, respectively. At the donor site, sensory reinnervation was acceptable. We conclude that ulnar parametacarpal perforator flaps offer sensate, thick and glabrous skin for finger pulp repair, all in a single operative field.Level of evidence: IV.

Supermicrosurgery: History, Applications, Training and the Future

Supermicrosurgery, a technique of dissection and anastomosis of small vessels ranging from 0.3 to 0.8 mm, has revolutionized the fields of lymphedema treatment and soft tissue reconstruction. The technique offers several distinct benefits to microsurgeons, including the ability to manipulate small vessels that were previously inaccessible, and to minimize donor-site morbidity by dissecting short pedicles in a suprafascial plane. Thus, supermicrosurgery has become increasingly popular in recent years, and its applications have greatly expanded since it was first introduced 20 years ago. While supermicrosurgery was originally developed for procedures involving salvage of the digit tip, the technique is now routinely used in a wide variety of microsurgical cases, including lymphovenous anastomoses, vascularized lymph node transfers and perforator-to-perforator anastomoses. With continued experimentation, standardization of supermicrosurgical training, and high quality studies focusing on the outcomes of these novel procedures, supermicrosurgery can become a routine and valuable component of every microsurgeon's practice.

Reconstruction of soft-tissue lesions of the foot with the use of the medial plantar flap

Objective

To study use of the medial plantar flap for reconstruction of the heel and foot.

Method

The authors share their clinical experience with the use of the medial plantar artery flap for coverage of tissue defects around the foot and heel after trauma. Twelve cases of medial plantar artery flap performed from January 2001 to December 2013 were included.

Results

Of the 12 patients, ten were male and two were female. The indications were traumatic loss of the heel pad in ten cases and the dorsal foot in two cases. All the flaps healed uneventfully without major complications, except one case with partial flap loss. The donor site was covered with a split-thickness skin graft. The flaps had slightly inferior protective sensation compared with the normal side.

Conclusion

From these results, the authors suggest that the medial plantar artery flap is a good addition to the existing armamentarium for coverage of the foot and heel. It is versatile flap that can cover defects on the heel, over the Achilles tendon and plantar surface, as well as the dorsal foot. It provides tissue to the plantar skin with a similar texture and intact protective sensation.

Technical Points of 5 Free Vascularized Flaps for the Hand Repairs

In this article, we present the experiences from Chinese microsurgeons on 5 less commonly used free vascularized flaps in hand reconstruction. In many units in China, these flaps have become the mainstays of treatment; they are routinely used for fingertip and thumb reconstruction. Their combined experience has demonstrated the reliability and versatility of these flaps for hand reconstruction, as well as their cosmetic value.

The use of fabricated chimeric flap for reconstruction of extensive foot defects

Repair of extensive foot defects requires both adequate tissues for wound coverage and special tissues for functional reconstruction. To maximize its function reconstruction, fabricated chimeric flaps consisting of multiple separate flaps were designed to reconstruct such defects. Five patients suffered extensive foot defects with sizes ranging from 23 × 12 cm to 38 × 14 cm(2) in multiple regions including heel, forefoot, dorsum, ankle, anterior leg, and even toes. Causes included crushing injuries, avulsion injuries, and scar excision. Most areas of the defects except heel were first covered by latissimus dorsi muscle flap or anterolateral thigh flap and their pedicles were anastomosed with recipient vessels. Then free medial plantar flaps were transferred for heel reconstruction and their pedicles were further attached to either side branches of the main source vessel or to its distal continuation. All chimeric flaps survived uneventfully and all patients were able to walk in normal footwear during the 1.5- to 4-years follow-up. None of the flaps developed ulcer and flap breakdown. The assessment by Maryland Foot Score showed that four of the five patients gained a "good" recovery and one patient showed moderate improvement of foot functions. Appearances of reconstructed heels were near-normal. The results indicate that fabricated chimeric flap has good design flexibility and may provide an option for functional reconstruction of extensive foot defects. © 2015 Wiley Periodicals, Inc. Microsurgery 36:303-309, 2016.