Why do you need to put a note with the overlay time under the tourniquet or twist?

This small detail is very important when applying the tourniquet. The tourniquet stops the blood and it does not enter a certain part of the body. This is important for stopping blood, treating a wound, stitching a wound, and so on. But if blood does not flow for a long time to a certain part of the body, then cell death occurs. The matter may come to the need for amputation because of this. A note with the time the tourniquet was applied allows doctors to know when the tourniquet should be removed. Also, a person can simply forget or confuse the time of applying the tourniquet, and a note is a safety net.