What is the main purpose of a tourniquet during surgery?

The main purpose of a tourniquet during surgery is to restrict blood flow to minimize bleeding. By inflating the tourniquet around a limb, it effectively occludes the arteries and veins in that area, preventing blood from flowing to the surgical site. This reduction in blood flow is crucial during certain procedures, as it provides a clearer field for the surgeon to work, enhances visibility, and minimizes the risk of excessive blood loss.

This technique is particularly important in orthopedic, vascular, or trauma surgeries, where controlling blood flow can significantly impact the outcome of the procedure. The controlled application of a tourniquet also helps in assessing the surgical area by reducing the amount of blood that may obscure visibility during the operation.

In contrast, other options such as immobilizing the limb, applying pressure to open wounds, or assisting with suturing are related but do not capture the primary function of a tourniquet, which is specifically aimed at managing blood flow effectively.