ABPI Normal 1.0-1.2 — FRCA Primary MCQ

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ModeratePhysiology - CardiovascularABPI Normal 1.0-1.2FRCA Primary

The ankle-brachial pressure index (ABPI) is used to assess peripheral vascular disease. A normal ABPI is:

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Correct answer: A — 1.0-1.2

ABPI = ankle systolic pressure / brachial systolic pressure. Normal: 1.0-1.2. Mild PVD: 0.8-0.9. Moderate PVD: 0.5-0.8. Severe PVD/critical limb ischaemia: <0.5. ABPI >1.3 suggests calcified incompressible vessels (e.g. diabetes / renal failure). ABPI is relevant for preoperative vascular assessment and for deciding on tourniquet safety.

Reference: Power Kam 2018 Principles of Physiology for the Anaesthetist