Normal capillary refill is less than how many seconds?

• A. Less than 3 seconds
• B. Less than 2 seconds
• C. Less than 4 seconds
• D. Less than 5 seconds

Answer: (B)

Capillary refill time is a quick measure of peripheral perfusion. You press on a nail bed to blanch it, then release and observe how long it takes for color to return. Normal refill is under 2 seconds. If it takes longer than about 2 seconds, it can indicate reduced peripheral perfusion from dehydration, hypovolemia, shock, or vasoconstriction, though environmental factors like cold temperature or age can affect the result. Interpret the test in context and ensure the limb is at heart level and the environment is warm.