When wound packing is the right call
Wound packing is the middle step in the Stop the Bleed® sequence. Direct pressure first. Pack the wound if pressure alone cannot reach the source. Tourniquet if the wound is on a limb and packing plus pressure still will not close it.
The indication is specific. Packing is for deep wounds, where the bleeding source is too far inside the cavity for surface pressure to reach, and for junctional injuries: the groin, the armpit, the base of the neck where a limb meets the torso.
Those are the places a tourniquet cannot go because there is no single bone above the wound to compress against.
On a limb, packing can also be the step between pressure and a tourniquet. A deep wound on the thigh or upper arm, with retracted vessels pulling the source up out of reach, often responds to packing the cavity firmly before the tourniquet is needed.
Do not pack the abdomen if you can see internal organs. Those wounds have different protocols and are handled by EMS with you keeping the patient still and calm until they arrive.
If direct pressure alone is controlling the bleeding, keep doing that. Packing is for the bleeding that pressure cannot close. The wound looks bad is not the trigger. The blood is not slowing under your hands is the trigger.
How to pack a wound, step by step
The motions below are the same whether you have hemostatic gauze, plain rolled gauze, or a clean shirt. Material matters, but technique matters more. A wound packed correctly with a clean cotton shirt outperforms a wound packed gently with the best hemostatic gauze on the market.
- 1Expose the wound. Cut or tear clothing back so you can see the cavity clearly. A wound packed through fabric does not seal.
- 2Find the source. Wipe blood away with your free hand or a piece of cloth to identify where it is coming from. The source is often deeper than the skin opening suggests.
- 3Push the gauze into the wound with one or two fingers, all the way down to the source. Use the tip of your finger to drive it in. Tentative does not work.
- 4Keep feeding gauze into the cavity until it is full. A deep thigh or groin wound can take an entire roll. Pack it tight against the bleeding source, not on top of it.
- 5Once the cavity is packed, put both hands directly over the wound and press down hard. Lean your weight into it. Hold for at least three uninterrupted minutes. Do not lift to peek.
- 6After three minutes, keep pressure on while you wrap a pressure bandage over the packing. If you do not have a pressure bandage, keep your hands there until EMS arrives.
- 7Call 911 if you have not already. Tell them you have packed a wound and where it is, so the arriving crew knows what to expect.
Push it in. Fill the cavity. Hold for three minutes. Wrap. Do not lift to check.
When to use hemostatic gauze vs plain gauze
Hemostatic gauze is plain gauze impregnated with a substance that accelerates clotting on contact with blood. The two formulations sold to civilians are kaolin-based (QuikClot Combat Gauze) and chitosan-based (Celox).
Both are recommended by the Committee on Tactical Combat Casualty Care and both are carried in many bleeding-control kits.
In a civilian kit, hemostatic gauze costs roughly twenty to thirty dollars per pack and has a shelf life of about five years from manufacture. It is not a gadget. It buys a faster clot in the wounds where seconds matter, particularly junctional bleeding where pressure alone is doing most of the work.
Plain rolled gauze works too. It works by mass and by holding sustained pressure against the bleeding source long enough for the body to form its own clot. The difference is time.
Hemostatic gauze typically forms a stable clot in about three minutes of held pressure. Plain gauze often needs longer, sometimes considerably longer, and the failure mode is the same: a rescuer who lifts up to check before the clot is stable.
- If you have hemostatic gauze, use it. Pack it the same way you would pack plain gauze.
- If you do not, use whatever clean rolled gauze is in the kit.
- If there is no gauze at all, a clean cotton t-shirt torn into strips or a clean towel will pack a wound. It is not optimal. It is what is available.
- Avoid paper towels, tissues, or anything that disintegrates when wet. They will not hold pressure against the source.
Test your response
A coworker has fallen through a glass partition at the office. There is a deep gash high in the groin, where the leg meets the hip. Blood is soaking through his trousers and pooling on the carpet. Your hand pressed on the cloth is not closing it. The first-aid kit on the wall has a roll of gauze inside. What do you do next?
Be honest. No one's watching.
Wound packing vs tourniquet
Both tools control severe bleeding. The wound location and the depth of the bleed decide which one is correct, and sometimes the answer is both.
Limb wounds. A bleeding wound on the arm or leg that does not stop with direct pressure is a tourniquet wound. Place the tourniquet two to three inches above the wound on a single long bone, never over a joint, and tighten until the bleeding stops.
Packing the wound first is reasonable for deep limb wounds where the source has retracted upward, but the tourniquet remains the primary tool on a limb.
Junctional wounds. A wound at the groin, the armpit, or where the neck meets the shoulder cannot be tourniqueted. There is no single bone above the wound to compress against. These wounds are packed. Push gauze into the cavity, hold sustained pressure, and wrap a pressure bandage on top.
Torso wounds. A wound in the chest is not packed and not tourniqueted. It is sealed with an occlusive dressing (or, if nothing else is available, a piece of plastic taped on three sides to act as a one-way valve).
A wound in the abdomen with exposed organs is covered with damp, clean cloth and left alone until EMS arrives.
When both are needed. A deep, high-volume wound on a muscular thigh with retracted vessels sometimes does not close with a tourniquet alone.
Packing the wound cavity, then applying or maintaining the tourniquet above it, is the combination protocol used in tactical and civilian settings. If your first response is not working, the next step is to add, not to swap.
Where people go wrong
Wound packing fails in a small number of repeatable ways. None of them are about not knowing the steps. They are about the instinct to be gentle in a moment that calls for the opposite.
Too gentle. The most common failure. Packing a wound feels wrong. You are pushing material into a person who is already hurt, and the instinct is to be careful.
Gentle packing does not reach the bleeding source. The gauze sits in the upper layer of the wound while blood continues to leave the body underneath. Drive the gauze in with the tip of your finger and pack it tight.
Not enough material. A deep wound on the thigh or the groin can take an entire roll of gauze. If the cavity is not full, the pressure on top has nothing to press against. Keep feeding gauze in until you cannot fit any more.
Releasing pressure to check. Three minutes is a long time when someone is bleeding and you are holding the only thing keeping them alive. Lifting up to see if it worked is the move that resets the clock and restarts the bleed. Hold. Count if you have to. Do not look.
Packing the wrong wound. A chest wound is not packed. Material pushed into a chest wound can enter the chest cavity and make the situation worse.
If the wound is between the collarbone and the bottom of the rib cage, seal it on top with something that does not let air in. Pack what should be packed; seal what should be sealed.
Stopping at the gauze. Packing is half the technique. The other half is the three minutes of sustained pressure on top, then the pressure bandage. A packed wound with no pressure on it will bleed through. Stay on it.
~7 min
Median 911-to-arrival EMS response time in U.S. urban areas. Suburban medians sit closer to fourteen minutes, rural medians at thirty or more (Mell et al., JAMA Surgery, 2017). A junctional bleed can drop a patient toward shock inside that window. The first hands on the wound are the patient's chance.