first dorsal metacarpal artery flap
Versatile fasciocutaneous flap from dorsal hand used for thumb and index finger reconstruction with reliable vascular supply.
Full Definition
The first dorsal metacarpal artery flap (FDMA flap) is a reliable fasciocutaneous flap harvested from the dorsum of the hand, based on the first dorsal metacarpal artery. This versatile flap is commonly used for reconstruction of soft tissue defects of the thumb, index finger, and first web space. The vascular anatomy is consistent, with the artery arising from the radial artery and running along the radial border of the second metacarpal. The flap can be designed as an island flap or advancement flap depending on the reconstructive needs. Advantages include excellent reach to most areas of the thumb and index finger, reliable vascularity, and the ability to provide thin, pliable tissue coverage. The donor site typically requires skin grafting, and care must be taken to preserve the superficial branch of the radial nerve during harvest.
Usage
Usage note: May be abbreviated as FDMA flap or first DMCA flap; specify flap design and donor site management.
In Context
- "A first dorsal metacarpal artery flap was used to reconstruct the thumb tip defect with excellent vascularity." — Operative report
- "The FDMA flap provided durable coverage with good contour match for the index finger injury." — Plastic surgery note