What does segmental limb pressure testing assess?

• A. Localizes arterial disease by comparing pressures at multiple limb levels to identify the diseased segment
• B. Evaluates venous reflux and insufficiency only
• C. Measures central aortic pressures
• D. Tests heart function via limb pressures

Answer: (A)

This test assesses where in the arterial tree the limb is narrowed by comparing pressures at several limb levels to locate the diseased segment. By taking systolic pressures at multiple sites along the leg—thigh, calf, ankle, and sometimes foot—the clinician looks for pressure gradients between adjacent segments. A normal limb maintains fairly consistent pressures along its length, while a significant drop from one segment to the next pinpoints the level of arterial disease. This localization is the key value of segmental limb pressure testing, guiding diagnosis and treatment planning for peripheral arterial disease. It’s not about venous reflux, central aortic pressures, or heart function.