Which device is designed to stop blood flow to a surgical site?

• A. Radiant Warmer
• B. Blood Warmer
• C. Incubator
• D. Auto Tourniquet

Answer: (D)

Stopping blood flow to a surgical site is achieved with a tourniquet that applies pressure around a limb to occlude arterial inflow. An auto tourniquet is the automated version of this device: it inflates a cuff around the limb, controls the pressure, and can time the occlusion to create a clear, bloodless field for the surgeon. This helps the team see the operative area better and reduces blood loss during procedures on arms or legs. It's important to monitor the pressure and duration to prevent nerve or tissue damage, and to release the cuff appropriately to restore normal circulation.

The other devices serve different purposes: a radiant warmer is used to keep a patient warm, typically a newborn; a blood warmer heats blood for transfusion; an incubator provides a controlled environment for neonatal care.