What is the normal toe-brachial index range?

• A. 0.8-0.9
• B. 0.5-0.6
• C. 1.0-1.2
• D. 0.2-0.4

Answer: (A)

The toe-brachial index compares toe systolic pressure to brachial systolic pressure to gauge distal perfusion, and it’s particularly useful when the ankle–brachial index may be unreliable from calcified vessels. The normal range is about 0.8 to 0.9, indicating adequate toe perfusion relative to the arm. Values lower than this suggest some degree of arterial insufficiency to the toes, with 0.7 or below often signaling PAD. A value like 1.0–1.2 isn’t typically considered a normal toe range and can reflect measurement artifacts or unusual physiology, while very low ranges (0.2–0.4, 0.5–0.6) indicate more severe disease.