The primary purpose of hemostasis is to prevent blood loss from damaged vessels by quickly forming a stable platelet plug and initiating the coagulation cascade. This process is crucial during surgery to maintain vascular integrity and avoid excessive bleeding. Effective hemostasis ensures that blood loss is minimized, preserving hemodynamic stability and allowing proper wound healing. Failure of hemostasis can lead to hemorrhage, complicating surgical procedures and patient recovery.

Reference: Robbins Basic Pathology, Kumar, Abbas, Aster, 10th Edition.