Capillary refill time (CRT) is a measure of the time it takes for a distal capillary bed, such as those found in the fingers, to regain colour after pressure has been applied to cause blanching. A prolonged CRT may indicate the presence of circulatory shock.

What does a high capillary refill time mean?

A prolonged capillary refill time may be a sign of shock and can also indicate dehydration and may be a sign of dengue hemorrhagic fever and decreased peripheral perfusion. Prolonged capillary refill time may also suggest peripheral artery disease.

What does reduced capillary refill indicate?

Mucous Membranes Normal membranes are pink with a capillary refill time of <2 seconds. Membrane pallor suggests poor perfusion or anemia (evaluate for intestinal parasitism, especially hookworm infection). Pallor and prolonged refill time suggest heart failure or reduced blood pressure with reactive vasoconstriction.