The capillary refill test relies on blanching of the skin to assess which parameter?

The capillary refill test relies on blanching of the skin to assess which parameter?

• A. Perfusion
• B. Oxygen saturation
• C. Temperature
• D. pH

Answer: (A)

Capillary refill time gauges peripheral perfusion—the speed at which blood returns to the skin after pressure is applied. When you press on a nail bed or skin, the capillaries blanch as blood is temporarily squeezed out. Releasing shows how quickly color comes back, reflecting how well blood is circulating to the extremities. A normal, rapid refill suggests adequate perfusion, while a delayed refill indicates reduced perfusion, which can occur with dehydration, shock, or compromised circulation. This test does not measure oxygen saturation, temperature, or pH, which are assessed by other methods.

Capillary refill time gauges peripheral perfusion—the speed at which blood returns to the skin after pressure is applied. When you press on a nail bed or skin, the capillaries blanch as blood is temporarily squeezed out. Releasing shows how quickly color comes back, reflecting how well blood is circulating to the extremities. A normal, rapid refill suggests adequate perfusion, while a delayed refill indicates reduced perfusion, which can occur with dehydration, shock, or compromised circulation. This test does not measure oxygen saturation, temperature, or pH, which are assessed by other methods.