Capilary refill on nail beds..
a. To palpate, gently grasp the patient’s finger and observe the color of the nail bed. Next, apply gentle, firm, quick pressure with the thumb to the nail bed and release and observe capillary refill. As you apply pressure, the nail bed appears white or blanched; however, the pink color should return immediately on release of pressure. You measure capillary pressure in seconds; less than 2 seconds is brisk, whereas greater than 4 seconds is sluggish.