Reconstruction of Ischial Pressure Sore by Using Posterior Thigh Transposition Flap

ABSTRACT

The area overlying the ischium is a frequent site for the development and recurrence of pressure sores because they directly overlie the points of maximum pressure on the sitting surface. Furthermore, they are frequently complicated by abnormal lesional bursae, or by extension, fistula toward the perineum or peritoneal cavity. In all cases of the ischial pressure sores, total en bloc excision of the ulceration, underlying bony prominence with immediate closure, and healthy, well-vascularized soft tissue is required to obtain the satisfactory result. It is well known that the choice of the treatment of the ischial pressure sore is the gluteal or posterior thigh flap. There have been many reports on the reconstruction of the ischial pressure sores such as cases involving the fasciocutaneous flap, muscle and musculocutaneous flaps, V-Y advancement flaps, rotation flaps, and long random flaps. In spite of these varieties, the recurrence of the ischial pressure sore after treatment still remains about seventy-five percent according to Conway and Griffith.9 Consequently, any surgical plane for ischial pressure sores must provide a stable, durable soft tissue cover that can be reused in the event of recurrence. From February to December 2002, we have performed the reconstruction of the ischial pressure sores on the posterior thigh's transposition flap in order to get following advantages simplicity of the operation, sufficiency of padding with skin flap, preservation of the adjacent normal tissues and the capability of recycling this same flap in case of recurrences. Its design is somewhat different from and more extended widely than that of the gluteal or posterior thigh flap. This flap was elevated above the deep fascia to be cutaneous with appropriate backcut incision; some perforators from the inferior gluteal artery were also preserved. We present some cases of ischial pressure sores treated with a laterally based posterior thigh transposition flap herein. Therefore, the need to perform repetitive surgery in the future must be considered so that the maximum number of reconstructive options can be preserved. Although the follow-up period has not always been satisfactory, we have not had any serious complications in these patients until recently.