Microvascular surgical techniques can be used in reconstructive surgery, such as free-tissue transfer or free-bone transfer. Free-tissue transfer involves removing muscle with its blood vessels and then transferring the muscle to another location in the body. The muscle’s artery and vein are then hooked up to local blood vessels, which re-establishes the muscle’s blood supply. This is often done for soft-tissue defects created by trauma or tumor surgery. An example of free-tissue transfer is the free-latissimus dorsi muscle flap.