Please select one of the following:

Pressing over skin for 3 seconds, normally return of perfusion (i.e. pink) by 2 seconds
Pressing over skin for 5 seconds, normally return of perfusion (i.e. pink) by 5 seconds
Pressing on skin for 5 seconds, normally return of perfusion (i.e. pink) by 2 seconds
Pressing on skin for 10 seconds, normally return of perfusion (i.e. pink) by 5 seconds