How long does a limb need to lose blood flow before it permanently loses some functionality?

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Once, I fell asleep with my arm in a particular position, and when i got up, for at least 5 minutes, I had no sensation or control. I wonder, how much longer would it have taken?

In: Biology

3 Answers

Anonymous 0 Comments

About two hours, but it varies.

Two hours is the usual guideline maximum time for a tourniquet.

Serious damage *could* occur in 30 minutes, or even less – it depends on lots of things. Which limb, how big the person is, how fit they are, what the temperature is, what medication they’ve taken, etc.

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