Hemostatic Agents in Gynecologic Surgery
Introduction to Hemostatic Agents
- Collagen-based agents directly trigger platelet aggregation and initiate the clotting cascade, making them particularly effective when other hemostatic mechanisms may be compromised, as recommended by the American College of Surgeons 1
- The American College of Cardiology recommends gelatin-based products for cavity bleeding control, particularly when combined with sutures 1
Primary Hemostatic Agent Categories
- Collagen-based agents work by entrapping and activating platelets on contact with bleeding surfaces, and are often combined with thrombin to enhance hemostatic effect, with a strength of evidence level of high 1, 2, 3
- Gelatin-based hemostatic agents function through physical mechanisms, swelling when in contact with blood to reduce blood flow, and can be used alone or combined with thrombin for enhanced effect, with a strength of evidence level of moderate 3, 4
- Fibrin-based products have both hemostatic and sealant properties, and are most effective for prevention of re-bleeding rather than active massive hemorrhage, as the fibrin clot may be washed away by blood flow, with a strength of evidence level of high 5
Important Selection Factors
- The type and severity of bleeding (venous vs. arterial, oozing vs. active) should be considered when choosing a hemostatic agent, with collagen-based or gelatin-based agents recommended for oozing or slow bleeding, and chitosan-based agents recommended for difficult-to-access areas 2, 6
- The patient's coagulation status and surgical procedure type and anatomic location should also be considered, with fibrin sealants recommended for prevention of re-bleeding after initial control 2, 3, 5, 6