What is the maximum recommended time for a tourniquet to be applied?

The maximum recommended time for a tourniquet to be applied is typically up to 2 hours. This time frame is based on the balance between controlling life-threatening hemorrhage and the potential for tissue damage and complications due to prolonged ischemia.

When a tourniquet is applied, it stops blood flow to the area below the injury, which is crucial during traumatic situations where severe bleeding needs to be managed quickly. However, after a certain time, it increases the risk of muscle and nerve damage, as well as other complications such as compartment syndrome. While some studies suggest that in certain cases, tourniquets may be left in place longer under close medical supervision, the standard recommendation remains around 2 hours for effectiveness and patient safety.

The other durations mentioned may exceed safe limits for ischemia and tissue viability, hence not being the best response to the question.