Which statement correctly characterizes a free flap in the context of lower-extremity reconstruction?

Which statement correctly characterizes a free flap in the context of lower-extremity reconstruction?

• A. It is transferred to the defect without its own blood supply
• B. It is transferred with its own blood supply
• C. It requires no donor site
• D. It never requires microvascular anastomosis

Answer: (B)

A free flap is tissue that is completely detached from its original site and transferred to a defect with its own blood supply carried in a vascular pedicle, then reconnected to recipient vessels with microvascular anastomosis. This reestablishes arterial inflow and venous outflow for the transferred tissue, which is essential because the tissue no longer has its native blood supply. In lower-extremity reconstruction, this approach allows large or complex defects to be covered using tissue from a distant donor site while maintaining reliable perfusion through the flap’s own artery and vein. The other statements don’t fit because a free flap does come with its own blood supply, it does require a donor site, and it relies on microvascular connections to reestablish circulation at the recipient site.

A free flap is tissue that is completely detached from its original site and transferred to a defect with its own blood supply carried in a vascular pedicle, then reconnected to recipient vessels with microvascular anastomosis. This reestablishes arterial inflow and venous outflow for the transferred tissue, which is essential because the tissue no longer has its native blood supply. In lower-extremity reconstruction, this approach allows large or complex defects to be covered using tissue from a distant donor site while maintaining reliable perfusion through the flap’s own artery and vein.

The other statements don’t fit because a free flap does come with its own blood supply, it does require a donor site, and it relies on microvascular connections to reestablish circulation at the recipient site.