A person demonstrates how to assess<unk>  time <unk> T) on a dummy<unk>  time <unk> T) is defined as the time taken for color to return to an external<unk>  bed after pressure is applied to cause blanching. It can be measured by holding a hand higher than heart-level and pressing the soft pad of a finger or fingernail until it turns white, then taking note of the time needed for the color to return once pressure is released. In humans,<unk> T of more than three seconds indicates decreased peripheral perfusion and may indicate cardiovascular or respiratory dysfunction.
Capillary refill
Pulse 
Pulse
Red reflex
Scratch reflex
Diving reflex
Tendon reflex
Pulse pressure