Which areas of the hand can be affected by a radial forearm free flap (RFFF) without prior Allen's test?

Which areas of the hand can be affected by a radial forearm free flap (RFFF) without prior Allen's test?

• A. All fingers
• B. Thumb and forefinger
• C. Middle and ring fingers
• D. Little finger only

Answer: (B)

The radial forearm free flap (RFFF) is an important surgical technique used in reconstructive surgery, particularly in the head and neck regions. It is taken from the forearm and can be used to reconstruct defects in the face, mouth, and throat. When considering the areas of the hand that can be affected by the RFFF without prior Allen's test, the rationale for selecting the thumb and forefinger is based on the vascular anatomy of the hand. The radial artery, which is the primary vessel used in the RFFF, supplies blood to the thumb and the radial side of the index finger. Therefore, when a RFFF is performed and the radial artery is harvested, the blood supply to the thumb and forefinger may be compromised if the ulnar artery does not adequately compensate through other vessels in the hand. The Allen’s test is used to assess the collateral circulation in the hand, but if it is not performed prior to the flap procedure, there is a higher risk for ischemic complications specifically in the regions supplied by the radial artery. In contrast, other areas of the hand, such as the middle, ring, and little fingers, predominantly rely on the ulnar artery and its branches for their blood supply. Thus, these

The radial forearm free flap (RFFF) is an important surgical technique used in reconstructive surgery, particularly in the head and neck regions. It is taken from the forearm and can be used to reconstruct defects in the face, mouth, and throat. When considering the areas of the hand that can be affected by the RFFF without prior Allen's test, the rationale for selecting the thumb and forefinger is based on the vascular anatomy of the hand.

The radial artery, which is the primary vessel used in the RFFF, supplies blood to the thumb and the radial side of the index finger. Therefore, when a RFFF is performed and the radial artery is harvested, the blood supply to the thumb and forefinger may be compromised if the ulnar artery does not adequately compensate through other vessels in the hand. The Allen’s test is used to assess the collateral circulation in the hand, but if it is not performed prior to the flap procedure, there is a higher risk for ischemic complications specifically in the regions supplied by the radial artery.

In contrast, other areas of the hand, such as the middle, ring, and little fingers, predominantly rely on the ulnar artery and its branches for their blood supply. Thus, these