The natural cutoff for capillary refill is 2 seconds.
A sluggish capillary refill alone isn't an emergency, but it's another quick beside assessment of perfusion (specifically newly oxygenated blood coming in).
A cyanotic limb, a sluggish capillary refill at 3, 4, 5 seconds, absent peripheral pulses, cool to touch, pain out of proportion, particularly with passive extension of some muscle compartments (this is more specific to Compartment Syndrome), all build a case to try to order investigations or specialist consults that are a pain in the ass to acquire because of resources.
The natural cutoff for capillary refill is 2 seconds.
A sluggish capillary refill alone isn't an emergency, but it's another quick beside assessment of perfusion (specifically newly oxygenated blood coming in).
A cyanotic limb, a sluggish capillary refill at 3, 4, 5 seconds, absent peripheral pulses, cool to touch, pain out of proportion, particularly with passive extension of some muscle compartments (this is more specific to Compartment Syndrome), all build a case to try to order investigations or specialist consults that are a pain in the ass to acquire because of resources.