Situation: A 30-year-old man weighing 70 kg is brought to the emergency department after a motorcycle crash at 13:10. He is talking in full sentences. Bright red blood spurts from a deep wound of the left thigh despite a pressure dressing applied in the field. He has no head injury and no known drug allergies. A tourniquet is applied above the thigh wound. Which statement about its use is correct?

A tourniquet for life-threatening limb bleeding is placed above the wound and tightened until bleeding stops and the distal pulse is gone. It stays visible, the application time is recorded, and it is not loosened periodically by the nurse.

Why the tourniquet must be tightened until bleeding stops and the distal pulse disappears

The patient has a deep left thigh wound with bright red, spurting blood despite a pressure dressing. That description indicates arterial injury, not venous oozing. In this situation, the goal is complete occlusion of arterial inflow to the injured limb segment. A tourniquet is placed above the wound and tightened until arterial bleeding stops and the distal pulse is no longer palpable. If the distal pulse remains, arterial blood is still passing beneath the tourniquet, and the wound can continue to bleed.

Bright red spurting blood is a sign of arterial hemorrhage, which requires full arterial occlusion, not just reduction of venous oozing. Tightening only until venous oozing slows would leave arterial pressure intact and would not control life-threatening hemorrhage.

Key point! The correct endpoint for a tourniquet is cessation of bleeding plus absence of the distal pulse. A tourniquet that is too loose can actually worsen bleeding by blocking venous return while allowing arterial inflow to continue.

Why the tourniquet is not loosened periodically

Once a tourniquet is applied for life-threatening extremity hemorrhage, it should remain in place until definitive surgical or advanced care is available. Periodic loosening by the nurse is not recommended because releasing the tourniquet can allow renewed hemorrhage, dislodge early clot, and permit ischemic byproducts to enter the systemic circulation.

Routine loosening every 15 minutes is not appropriate in the emergency setting because it risks recurrent bleeding and reperfusion injury. The application time is recorded and communicated to the receiving team, but the tourniquet itself is not intermittently released by nursing staff.

The concern about limb ischemia is real, but the immediate threat of exsanguination takes priority. Watch out! Do not confuse tourniquet care with the management of a cast or a simple pressure dressing. A tourniquet for arterial hemorrhage is not a device that is periodically released to “let blood reach the tissues.”

Why the tourniquet must remain visible

The tourniquet should not be covered by a dressing, blanket, or clothing. It must remain visible so that the healthcare team can quickly identify its presence, inspect the site, and note the application time. Covering the tourniquet to keep the site warm or clean delays recognition and can lead to the tourniquet being overlooked during handoff or transport.

A tourniquet is kept exposed and clearly documented so that it is not accidentally left in place without appropriate reassessment. The application time is recorded on the patient or in the handoff report, but the device itself stays visible.

Clinical reasoning for the licensure exam

This question tests the priority action for arterial hemorrhage from an extremity. The correct answer reflects the standard endpoint for tourniquet application: bleeding stops and the distal pulse is gone. The other options describe incorrect practices that would either fail to control arterial bleeding or delay recognition of the tourniquet.

Option	Why it is incorrect
Tighten only until venous oozing slows	Does not occlude arterial flow; arterial spurting continues
Loosen every 15 minutes	Risks recurrent hemorrhage and is not done by the nurse
Tighten until bleeding stops and distal pulse is gone	Correct endpoint for arterial occlusion
Cover with dressing to keep warm and clean	Tourniquet must remain visible for monitoring and handoff

In trauma, hemorrhage is the leading cause of preventable death, and extremity tourniquets are a standard intervention when direct pressure fails ^[1][2]. The evidence emphasizes that tourniquets can be lifesaving when applied correctly, but inappropriate application—such as insufficient tightening or improper monitoring—can lead to complications ^[1][3]. The correct application endpoint is complete cessation of bleeding with loss of the distal pulse, and the device is not loosened periodically in the emergency phase ^[1][2][3].