Selecting a free flap for soft tissue coverage in lower extremity reconstruction.

Area of Science:

• Plastic Surgery
• Orthopedic Surgery
• Microsurgery

Background:

• Lower extremity microvascular reconstruction (LEMR) aims to restore function, prevent infection, and improve cosmesis.
• Indications include large defects, extensive injury zones, and complex wounds unsuitable for pedicled options.
• Novice microsurgeons benefit from mastering a core set of free flaps for versatile defect coverage.

Purpose of the Study:

• To review free flap options for lower extremity microvascular reconstruction (LEMR) across all thirds of the leg.
• To detail variations, advantages, disadvantages, indications, and surgical tips for each flap.
• To guide surgeons in selecting appropriate free flaps for diverse lower extremity defects.

Main Methods:

• Review of six commonly used free flaps for LEMR: anterolateral thigh (ALT), radial forearm (RFFF), lateral arm (LAF), gracilis, rectus abdominis (RAF), and latissimus dorsi.
• Discussion of indications, advantages, disadvantages, and technique tips for raising each flap.
• Inclusion of recipient vessel selection, preoperative management, and a decision-making algorithm.

Main Results:

• The anterolateral thigh (ALT) flap is highlighted as a versatile option for leg, foot, and ankle defects, particularly traumatic ones.
• The rectus abdominis flap (RAF) offers coverage for large defects but has associated donor-site morbidity.
• Other flaps like LAF, RFFF, gracilis, and latissimus dorsi provide specific benefits such as pliable tissue, long pedicles, ankle joint crossing, or coverage for extensive defects.

Conclusions:

• The ALT flap is a preferred choice for many lower extremity defects due to its versatility and effectiveness, especially in trauma.
• Different free flaps, including RAF, LAF, RFFF, gracilis, and latissimus dorsi, offer tailored solutions for specific defect characteristics and locations.
• Effective LEMR relies on understanding the nuances of each flap to achieve optimal functional and aesthetic restoration.