Inadequate perfusion to the extremities refers to decreased arterial blood flow to the extremities. Prolonged capillary refill time may also suggest peripheral artery disease. What causes abnormally rapid rate of capillary refill?Ī 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. Shock can be present despite a normal capillary refill time. “Frequent causes of sluggish, delayed or prolonged capillary refill (a refill time >2 seconds) include dehydration, shock, and hypothermia. Can dehydration cause delayed capillary refill? A refill time longer than two seconds signals cold septic shock and means the tank is not full and/or the pump is not working. If it is brisk, this signifies vasodilation and early warm septic shock. Normal capillary refill time is usually 2 seconds or less. It is a simple test to measure the time taken for colour to return to an external capillary bed after pressure is applied, typically by pressing the end of a finger with the thumb and forefinger. A prolonged CRT may indicate the presence of circulatory shock. What does capillary refill time indicate?Ĭapillary 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. An increase in SVR is generally thought to occur early in the course of pediatric hypovolemia. Shunting of blood from the capillary beds in the skin is an indication of increased systematic vascular resistance (SVR). A delay in the capillary refill time (>2 seconds) indicates hypoperfusion of the skin.
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