How often should a tourniquet applied to an adult leg be periodically deflated?

How often should a tourniquet applied to an adult leg be periodically deflated?

• A. Every 30 minutes
• B. Every 2 hours
• C. Every 1 hour
• D. Every 1 hour 12 minutes

Answer: (D)

Periodic reperfusion to prevent ischemic injury during prolonged leg tourniquet use is the main idea. When a tourniquet stays inflated, the limb is cut off from blood flow, and tissues accumulate metabolic byproducts while nerves and muscles risk damage from lack of oxygen. Allowing brief periods of reperfusion helps flush out waste products, restores some oxygen-delivery, and lets you check limb perfusion before continuing. In many adult-leg protocols, a practical interval to deflate is about 72 minutes. This timing balances keeping the surgical field workable with giving the limb enough rest from occlusion to reduce complications. When you deflate, do so briefly to allow fresh blood to return, then re-inflate if the procedure is ongoing, while monitoring the limb’s color, warmth, cap refill, and pulses to ensure adequate perfusion. Shorter intervals can disrupt the operation, while longer deflations increase the risk of ischemic injury, so this 72-minute window reflects a compromise used in practice.

Periodic reperfusion to prevent ischemic injury during prolonged leg tourniquet use is the main idea. When a tourniquet stays inflated, the limb is cut off from blood flow, and tissues accumulate metabolic byproducts while nerves and muscles risk damage from lack of oxygen. Allowing brief periods of reperfusion helps flush out waste products, restores some oxygen-delivery, and lets you check limb perfusion before continuing. In many adult-leg protocols, a practical interval to deflate is about 72 minutes. This timing balances keeping the surgical field workable with giving the limb enough rest from occlusion to reduce complications. When you deflate, do so briefly to allow fresh blood to return, then re-inflate if the procedure is ongoing, while monitoring the limb’s color, warmth, cap refill, and pulses to ensure adequate perfusion. Shorter intervals can disrupt the operation, while longer deflations increase the risk of ischemic injury, so this 72-minute window reflects a compromise used in practice.