Background: The use of perforator flaps has allowed for the transfer of large amounts of soft tissue with decreased morbidity. For breast reconstruction, the deep inferior epigastric perforator flap, the superior and inferior gluteal artery perforator flaps, and the transverse upper gracilis flap are all options. The authors present an alternative source using posterior thigh soft tissue based on profunda artery perforators, termed the profunda artery perforator flap.
Methods: Preoperative imaging helps identify posterior thigh perforators from the profunda femoris artery. These are marked, and an elliptical skin paddle, approximately 27 ! 7 cm, is designed 1 cm inferior to the gluteal crease. Dissection proceeds in a suprafascial plane until nearing the perforator, at which point subfascial dissection is performed. The flap has a long pedicle (approximately 7 to 13 cm), which allows more options when performing anastomosis at the recipient site. The long elliptical shape of the flap allows coning of the tissue to form a more natural breast shape.
Results: All profunda artery perforator flaps have been successful. The donor site is well tolerated and scars have been hidden within the gluteal crease. Long-term follow-up is needed to evaluate for possible fat necrosis of the transferred tissue.
Conclusions: The authors present a new technique for breast reconstruction with a series of 27 flaps. This is an excellent option when the abdomen is not available because of the long pedicle, muscle preservation, ability to cone the tissue, and hidden scar. (Plast. Reconstr. Surg. 129: 16e, 2012.)
CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, V.
Perforator flaps allow the transfer of large amounts of soft tissue with decreased morbidity. For breast reconstruction, the deep inferior epigastric perforator flap is the obvious option in most patients; however, in some patients, the thigh or buttock is a good alternative. The common choices are the superior or inferior gluteal artery perforator flaps and the transverse upper gracilis flap. We present a new option, which uses excess tissue from the posterior thigh. Hurwitz described the use of a posterior thigh myocutaneous flap based on the inferior gluteal artery, Angrigiani et al. described the transfer of posterior and medial thigh skin based on profunda femoris perforators, and Song et al. discussed the use of the posterior thigh perforator free flap. Cadaver studies have shown that the dominant blood supply to the posterior thigh is from the profunda femoris artery perforators. Flaps based on this circulation have been routinely used for pressure sores. We describe the use of the posterior thigh free flap based on profunda artery perforators in a series of 27 breast reconstructions.
Volume 129, Number 1 • Profunda Artery Perforator Flap
PATIENTS AND METHODS
The ideal patient has a breast of small to moderate size, and excess tissue in the posterior thigh. In our experience, suitable patients have had a wide spectrum of body mass indexes, with varying weights and heights. All of our patients have had previous abdominal surgery, limiting abdominal donor tissue, or have been very thin, with limited abdominal tissue. Patients with limited hip abduction are not ideal, as intraoperative positioning is much more difficult if the supine approach is used. Preoperative imaging can identify suitable posterior thigh profunda artery perforators.
The posterior thigh tissue is bordered by the iliotibial tract and adductor muscles horizontally and the gluteal fold and popliteal fossa vertically. The profunda femoris artery enters the posterior compartment of the thigh and typically gives off three main perforators. The first perforator supplies the adductor magnus and gracilis, and the second and third perforators supply the semimembranosus, biceps femoris, and vastus lateralis.
Preoperative Imaging and Markings
Magnetic resonance or computed tomographic angiography of the pelvis and thigh with contrast is performed in the planned operative position. Based on the imaging and a handheld Doppler probe, the skin perforators are identified and marked. There are typically both medial and lateral perforators, but we have recently favored the medial perforators. This preference is related to the increased ease of harvest in the supine position and the perforator size. This medial perforator tends to enter posterior to the gracilis muscle. There have been some situations in which a more posterior and lateral perforator was dominant and therefore used. The superior marking is 1 cm inferior to the gluteal fold. The inferior marking is approximately 7 cm below the superior marking. The flap is designed as an ellipse so the scar does not extend onto the visible lateral or medial thigh outside of the gluteal fold, being usually 27 cm transversely. Since the first profunda artery perforator (PAP) flap for breast reconstruction, we have had one patient that had an inadequate profunda artery perforator that required a transverse upper gracilis flap instead. In one case, the dominant perforator to the posterior thigh tissue was from the descending branch of the inferior gluteal artery.
(See Video, Supplemental Digital Content 1, which demonstrates the profunda artery perforator flap procedure,
In the supine or prone position, a profunda artery perforator flap can be raised in approximately 80 minutes.
Flap harvest was initially performed in the prone position; however, recently, the technique has been modified to use a supine “frog-leg” position. The supine frog-leg position offers the advantage of decreased operative time because of rapid dissection from a medial approach and the lack of a need for repositioning. The prone position uses a lateral approach and maintains the possibility of conversion to a transverse upper gracilis flap if no adequate perforators are identified (in our series, this has not been required). When the supine approach is used, there is no specific bailout, and therefore preoperative imaging is essential.
The elliptical incision is made and dissection proceeds to the superficial fascia. Beveling in the lateral thigh can increase flap volume and potentially help with postoperative donor-site contour. Beveling should be limited superiorly to avoid disturbing the contour of the inferior buttock and gluteal fold. In the prone approach, dissection proceeds laterally to the muscular fascia and the flap is elevated in a suprafascial plane. Dissection proceeds relatively rapidly until near the marked perforator and the fascia is entered. Subfascial dissection helps with perforator identification. In the supine position, the fascia is entered over the gracilis muscle and the vascular pedicle is identified approximately 3 cm posterior to the gracilis muscle. Once the key perforator is identified, standard perforator dissection proceeds to harvest the desired pedicle length and vessel diameter.
The donor site is closed in a multilayer fashion over a drain. After recipient-site preparation, the anastomosis is performed. The flap is deepithelialized and inset. In the supine or prone position, a profunda artery perforator flap can be raised in approximately 80 minutes.
Fig. 2. Case 1. Magnetic resonance angiography was performed
to identify posterior thigh profunda femoris perforators.
Standard postoperative free flap care and monitoring is performed. The patient can ambulate on postoperative day 1, but should avoid any strenuous exercise for 4 weeks. Length of hospital stay has been 2 to 4 days.
A 50-year-old woman with a history of unilateral total mastectomy with two-stage tissue expander and implant reconstruction 4 years previously presented for implant removal and autologous reconstruction secondary to capsular contracture (Fig. 1). After preoperative imaging (Fig. 2), an elliptical skin paddle (24 ! 7 cm) was designed (Fig. 3). She underwent removal of a 300-cc silicone implant and reconstruction with a 365-g profunda artery perforator flap from the prone position (Fig. 4, above and center). (See Video, Supplemental Digital Content 1, which demonstrates the profunda artery perforator flap procedure, http://links.lww.com/PRS/A426.)
Fig. 1. Case 1. A 50-year-old woman is shown following unilateral failed implant reconstruction.
Fig. 3. Case 1. The skin perforators were identified and marked and a skin paddle measuring 24 ! 7 cm was designed.
Fig. 4. Case 1. (Above) The flap was harvested from the prone position. (Center) The profunda artery perforator flap provided 365 g of tissue in a long elliptical shape. The vascular pedicle was approximately 10 cm in length. (Below) The profunda artery perforator flap provides the ideal shape for coning of transferred tissue to form a natural appearing breast.
The pedicle was 10 cm in length, with a 2.2-mm artery and a 3.0-mm vein. After the vascular anastomoses to the internal mammary vessels, the flap was deepithelialized and inset (Fig. 4, below). The patient was discharged from the hospital on the second postoperative day and experienced no postoperative complications. The patient is shown at 4 months after reconstruction (Figs. 5 and 6).
Fig. 5. Case1.Postoperative view of the patientat 4 months after breast reconstruction with a profunda artery perforator flap before nipple reconstruction and skin island removal.
Fig. 6. Case 1. (Above) Posteriorand(below) anterior views of the donor site 4 months postoperatively.
A 45-year-old woman underwent bilateral nipple-sparing mastectomies and, secondary to lack of abdominal tissue (body mass index, 18.2), bilateral profunda artery perforator flap reconstruction. The supine approach was used (Fig. 7). Mastectomy specimens were approximately 280 g each, and both flaps were approximately 400 g. The patient was discharged to home on postoperative day 3 without complication. The patient is shown at 7 weeks after reconstruction (Fig. 8).
Fig. 7. Case 2. Profunda artery perforator flap harvest from the supine position.
Fig. 8. Case 2. (Left) Preoperative and (right) 7-week postoperative views of the patient after bilateral breast reconstruction following bilateral nipple-sparing mastectomies.
A 51-year-old woman underwent bilateral nipple-sparing mastectomies and bilateral profunda artery perforator flap reconstruction. Mastectomy specimens weighed 172 and 196 g, and the flaps weighed 270 and 334 g. The patient was discharged to home on postoperative day 3 without complication. The patient is shown at 7 weeks after reconstruction (Fig. 9).
Fig. 9. Case 3. (Left) Preoperative and (right) 7-week postoperative views of the patient after bilateral breast reconstruction following bilateral nipple-sparing mastectomies.
A 38-year-old woman underwent bilateral breast reconstruction with the profunda artery perforator flap following bilateral mastectomies and failed implant reconstruction. The flap weights were 334 and 262 g. The patient had significant pectus excavatum on the right and therefore the larger flap was used on this side. The patient was discharged on postoperative day 3 without complication. The patient is shown preoperatively and at 3 months following reconstruction (Figs. 10 and 11).
Fig. 10. Case 4. (Left) Preoperative and (right) 3-month postoperative views of the patient
after bilateral breast reconstruction following bilateral mastectomies.
Fig. 11. Case 4. (Left) Preoperative and (right) 3-month postoperative views showing profunda
artery perforator flap donor sites.
All profunda artery perforator flaps were successful. In two flaps, there was less than 10 percent fat necrosis. There have been two donor-site complications: one seroma and one hematoma.
In many women, the posterior thigh is a potential donor site. The pedicle length, as long as 13 cm (average, 9.9 cm), provides versatility at the recipient site. The flap can be used for either ipsilateral or contralateral breast reconstruction, and either the internal mammary or thoracodorsal vessels can be used. In our series, only the internal mammary vessels have been used. The vessels have been of adequate size to provide for a good size match with the internal mammary vessels (average artery size, 2.2 cm; average vein to allow use of a venous coupler (Tables 1 and 2).
The elliptical design provides an ideal shape for coning to create a natural breast. Unlike gluteal flaps, the profunda artery perforator flap does not affect buttock contour. The posterior thigh tissue is more malleable than abdominal and gluteal tissue, allowing for better three-dimensional shaping of the breast. We have routinely been able to obtain proportional flap volume to match the mastectomy flap volumes despite a wide range of height and weight. The donor site has also been well tolerated in patients with various body mass indexes. The transverse upper gracilis flap provides a similar tissue quality but has decreased volume and a shorter pedicle, sacrifices the gracilis muscle, and has a visible scar anteriorly (Table 3). The profunda artery perforator flap avoids dissection near the inguinal lymphatics and should reduce the risk of lymphedema and seroma. The posterior femoral cutaneous nerve is found in the subfascial plane in the posterior midthigh, which provides the possibility of transferring a sensitized flap with branches from this nerve.
The main disadvantage of the profunda artery perforator flap is the potential need for prone positioning and intraoperative repositioning; however, as we have gained experience with this technique, we have transitioned to using a supine frog-leg approach. In addition, there may be size limitations in reconstruction for larger breasted women, although our profunda artery perforator flaps have ranged from 235 to 695 g, with an average of 385 g.
All profunda artery perforator flaps have been successful. As with all microvascular breast reconstruction, there is a risk of vascular compromise and the possibility for fat necrosis of the transferred tissue. In our series, we have had no vascular complications. We have seen less than 10 percent fat necrosis in two flaps. We have had two donorsite complications. There was one seroma, which was managed with a drain and resolved within 1 week, and one hematoma that caused a partial wound dehiscence and healed with local wound care. We have not had any other donor-site complications (e.g., significant postoperative posterior thigh sensation changes or disruptions in gait). We have noted that there is a potential to accentuate a preoperatively prominent saddlebag if the flap is not beveled to include the subcutaneous soft tissue in this area. In our series, no patients have required any secondary recontouring procedures. In addition, there is the possibility of damage to the posterior femoral cutaneous nerve in the posterior thigh. If a medial pedicle is chosen, elevation of the flap should continue in the suprafascial plane following perforator isolation to avoid injury to the posterior femoral cutaneous nerve. In our series, there have been no cases of neurapraxia.
We present a new technique for breast reconstruction with a series of 27 flaps. The profunda artery perforator (PAP) flap provides a long pedicle with sufficient vessel diameter, preserves muscle, can be optimally coned, and results in a fairly well-hidden scar and donor-site contour. In this series, there have been minimal complications and minimal amounts of fat necrosis. This is an excellent option when the abdomen is not available, and it has become our second-choice flap behind the deep inferior epigastric perforator flap.
Nicholas T. Haddock, M.D.
Department of Plastic Surgery New York University
Langone Medical Center
550 First Avenue, TCH 169
New York, N.Y. 10016
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