Noradrenaline Versus Glypressin for Prevention of Hypotension After Deflation of Tourniquet in Knee Arthroplasty

Pneumatic tourniquet is usually used in orthopedic surgeries, as it helps to decrease operative bed bleeding, and thus, maintaining a clean and dry surgical field allowing easy and clear identification of the anatomical structures. Despite that advantage, after its deflation, there is a blood volume shift towards that ischemic area, which may decrease cardiac preload leading to hypotension