AST Surgical Technologist Exam Practice 2025 – Complete Study Resource

The recommended maximum time limit for a tourniquet on an adult lower extremity is generally regarded as 1.5 hours. This recommendation is based on the need to minimize the risk of ischemia (lack of blood flow) and subsequent tissue damage. While tourniquets are an essential tool in surgery, particularly for controlling blood loss in the lower extremities, prolonged application can lead to severe complications, including nerve damage and muscle necrosis.

Current medical guidelines suggest that after about 1.5 hours, the risks associated with extended tourniquet application can sharply increase, making it crucial for surgical teams to monitor the time closely. This timeframe balances the need to maintain a bloodless field for surgical procedures with the safety and well-being of the patient.

Understanding this context helps clarify why the selected time limit is critical in clinical practice, emphasizing the importance of adhering to established surgical protocols to ensure patient safety.