interposition graft
A tissue graft placed between two structures to bridge a gap or provide separation.
Full Definition
An interposition graft is a piece of tissue, either autologous, allogenic, or synthetic, that is placed between two anatomical structures to bridge a defect, restore continuity, or provide separation. In plastic surgery, interposition grafts are commonly used in nerve reconstruction to bridge gaps in peripheral nerves, in vascular reconstruction to restore blood flow, or as spacers between structures to prevent adhesions. Common types include nerve grafts (often sural nerve), vein grafts for vascular reconstruction, and fascial grafts for soft tissue separation. The success of interposition grafts depends on proper sizing, tension-free placement, and adequate blood supply.
Usage
Usage note: Describes graft placement between structures; specify graft type and location.
In Context
- "A sural nerve interposition graft was used to bridge the 4cm gap in the facial nerve." — Nerve reconstruction report
- "The surgeon placed an interposition graft to prevent adhesion formation between the tendon and overlying skin." — Hand surgery procedure