The tourniquet referred to in knee surgery is usually an inflatable wrapping which goes around the upper thigh during surgery.

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Tourniquets

The tourniquet referred to in knee surgery is usually an inflatable wrapping which goes around the upper thigh during surgery.

After the blood is squeezed out of the leg with an elastic bandage, the tourniquet is inflated to above the blood pressure of the patient (usually inflated to 350 mm Hg) to stop all blood flow into and out of the limb. Here is a more detailed audio explanation of the issues related to tourniquets -

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