What does capillary refill assess?

Capillary refill is a quick test used to assess the circulatory status of an individual, particularly in terms of blood perfusion and circulation to the extremities. When capillary refill is conducted, pressure is applied to a nail bed or fingertip, temporarily blanching the skin. When the pressure is released, the time it takes for color to return to the area is measured. A normal capillary refill time, typically under two seconds, indicates good blood flow and sufficient perfusion. If the refill time is prolonged, it can suggest issues such as hypovolemia, shock, or other circulatory problems, making it a crucial indicator for first responders to assess the overall circulatory status of a patient.