Patient Care Technician (PCT) AAH Practice Exam

What is the primary function of a tourniquet during venipuncture?

1. Reduce pain

2. Prevent infection

3. Engorge the vein

4. Control bleeding

The correct answer is: Engorge the vein

The primary function of a tourniquet during venipuncture is to engorge the vein. When a tourniquet is applied, it restricts venous blood flow while allowing arterial flow to continue, causing the veins to fill with blood. This engorgement makes the veins more prominent and easier to locate, which is crucial for successful venipuncture. A well-engorged vein is less likely to collapse during the procedure and helps the healthcare provider to insert the needle accurately. While reducing pain, preventing infection, and controlling bleeding are important considerations in the overall context of venipuncture and patient care, they are not the primary function of the tourniquet itself. The tourniquet is specifically designed for the purpose of facilitating easier access to the venous system.