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Lesson

Tourniquet Conversion

11 min Trauma Skip to quiz

Objective: Leave the tourniquet on a patient in shock. Convert only if the patient is not in shock, the wound is visible, you can stop the bleeding again, and your protocol allows it. Do not loosen a tourniquet only to see if it is still needed.

Why this matters

A tourniquet that stopped arterial bleeding is a finished lifesaving action. Loosening it on a patient who is still in shock, or loosening it because the emergency department is close, can restart the bleeding you already stopped.

Conversion means replacing the tourniquet with a pressure dressing or packing, on purpose, in a patient who can tolerate it. Tactical Combat Casualty Care teaches that idea. It is not permission to loosen the tourniquet to look. A patient in shock keeps the tourniquet.

Key points
  • If the patient is in shock, is unstable, or has a wound you cannot see, the tourniquet stays on. Tell the receiving team the time.
  • If your protocol does not include conversion, do not invent it.
  • If you are authorized and the patient is not in shock, you need light, a visible wound, and a plan to tighten again the moment bleeding returns.
Verbalize
  • Say aloud / radio script. The tourniquet time is ___. The patient is in shock. The tourniquet stays on.
  • If we convert, we can see the wound, and we will tighten the tourniquet again if it bleeds.
  • I am not loosening this tourniquet only to check it.

Clinical sequence

  1. Confirm that the tourniquet stopped the bleeding and that the distal pulse is gone. A loose tourniquet is a venous tourniquet. It blocks veins and does not stop the artery. Fix it before you discuss conversion. Use tourniquet application.
  2. Treat other bleeding and shock. Conversion is not the first step in MARCH. MARCH is massive hemorrhage, airway, respirations, circulation, then hypothermia and head injury.
  3. If the patient is in shock, has lost a large amount of blood, or is deteriorating, leave the tourniquet on. Write the time on the tourniquet and on the chart.
  4. If protocol allows conversion, the usual teaching is a patient who is not in shock, a tourniquet that has not been on so long that the limb plan has changed, and a wound you can see and can pack or dress. Many Tactical Combat Casualty Care courses discuss trying within about 2 hours when those conditions are met. Your protocol decides whether you convert at all. Your medical director owns the time window.
  5. Loosen slowly while you watch the wound. If arterial bleeding returns, tighten immediately and stop the conversion. If the wound stays dry, finish the dressing the protocol describes and recheck often.

Teaching points

  • Committee on Tactical Combat Casualty Care guidance treats conversion as a deliberate skill for the right patient, not as routine removal.
  • More than one tourniquet may be on the limb. Know which one is working before you touch either.
  • Do not convert a tourniquet you cannot replace. Do not convert during a transfer when you cannot see the wound.

Common errors

  • Taking the tourniquet down in the ambulance bay so the trauma team can see the wound.
  • Calling a venous tourniquet a successful conversion.
  • Trying to convert because about 2 hours have passed, even though the patient is still in shock.

Practice

One-minute check

Two patients have tourniquets. One is pale, confused, and hypotensive. One is talking, warm, and an hour into a long transport, and your protocol allows conversion. Say which tourniquet stays on, in one sentence for each patient.

Sources & Further Study

Named guidelines for further study. They are not clinical orders and do not replace your protocol or medical direction.

Education only. Apply learning within your protocols and medical direction. This is not clinical care guidance.

Check Your Understanding

Questions drawn only from this lesson. After you check, the key is highlighted. Education practice — not a certification exam.

1. A tourniquet on a patient in hemorrhagic shock should be:
2. Tourniquet conversion, when a protocol allows it, requires:
3. If bleeding returns while you loosen a tourniquet during an authorized conversion, you should:
4. The time window discussed in TCCC teaching is:
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