Beyond Direct Pressure
Topical hemostatic agents are materials applied directly to a wound to accelerate the clotting process and control hemorrhage that does not respond to direct pressure alone. Originally developed for military use, these agents are now standard equipment on many civilian EMS units and are recommended by the Committee on Tactical Emergency Casualty Care (C-TECC) and the Hartford Consensus for active bleeding control.
Types of Hemostatic Agents
Kaolin-Based (Combat Gauze)
QuikClot Combat Gauze is impregnated with kaolin, a naturally occurring mineral that activates factor XII in the coagulation cascade. It is the hemostatic agent recommended by the Committee on Tactical Combat Casualty Care (CoTCCC). Combat Gauze is applied as a packing material directly into the wound cavity, with direct pressure maintained for at least 3 minutes.
Chitosan-Based (Celox, ChitoGauze)
Chitosan is derived from shrimp shells and works independently of the normal coagulation cascade by cross-linking with red blood cells and platelets to form a mucoadhesive gel plug. This makes chitosan-based agents effective even in patients on anticoagulant medications or with coagulopathy. Celox is available as granules, gauze, and rapid deployment strips.
Proper Application Technique
Effective use of hemostatic agents requires proper technique:
- Control the bleeding source: identify the exact location of hemorrhage within the wound
- Remove excess blood from the wound if possible (the agent needs contact with the bleeding vessel)
- Pack the hemostatic gauze directly into the wound cavity, starting at the bleeding source
- Pack tightly until the wound is completely filled
- Apply firm direct pressure over the packed wound for at least 3 minutes (5 minutes for chitosan-based products)
- Apply a pressure dressing over the wound
- Do not remove the packing; let hospital staff remove it under controlled conditions
Indications and Limitations
Hemostatic agents are indicated for compressible hemorrhage that does not respond to direct pressure alone, particularly in junctional areas (groin, axilla, neck) where tourniquets are not effective. They are not a substitute for tourniquets in extremity hemorrhage where tourniquet application is appropriate. Document the type of hemostatic agent used, the time of application, and communicate this information clearly during your hospital handoff.