Question

you have just depressed, blanched and released the client's nail bef on the index finger while noting the time for color return. This test is aptly termed:

a) Pulse oximetry

b) hypoxia

c)Palpation

d)capillary refill

Answer 1

Answer : Option D : Capillary refill

Capillary refill time (CRT) is the time taken for colour to return to a distal capillary bed after pressure is applied to cause blanching. CRT is regarded as the quickest and easiest way of assessing early hypoperfusion.

It is usually measured by holding a hand higher than level of heart and applying pressure on  the nailbed until it turns white;  then recording the time needed for the colour to return once pressure is released.

Normal capillary refill time is usually less than 2 seconds.

In newborn infants, capillary refill time can be measured by applying pressure over the sternum for five seconds with a finger, and noting the time needed for the refill. The normal capillary refill time in newborns is less than 3 seconds.

Capillary refill time is a marker of peripheral perfusion.

CRT is prolonged in cases of :-

1) Circulatory shock- Dehydration, Sepsis , Dengue hemorrhagic fever

2) Cold extremities

3)Peripheral vascular disease