What is the primary purpose of a tourniquet during surgery?

The primary purpose of a tourniquet during surgery is to minimize blood loss. By restricting blood flow to a specific area, a tourniquet helps create a bloodless field, making it easier for surgeons to perform procedures with greater precision and control. This is especially crucial in operations involving limbs, where significant bleeding can complicate surgical access and increase risks for the patient.

In contrast, while improved visibility can result from reduced blood flow, that is a secondary benefit rather than the main intention of using a tourniquet. Infection prevention typically involves sterilization techniques and other protocols rather than the application of a tourniquet. Lastly, securing the patient is important for safety during surgery, but this is generally achieved using straps or other restraints rather than a tourniquet. Thus, the fundamental role of a tourniquet is primarily to control blood loss during surgical procedures.