Absorbable hemostatic sponges can be divided into the following categories according to different materials:
1. Gelatin sponge: mainly made of rubber band or fish scales, it is the most common absorbable hemostatic sponge.
2. Chitosan hydrochloride sponge: made of biomass materials such as seaweed, it has better biocompatibility and biodegradability than gelatin sponge.
3. Polyester sponge: made of polyester material, it has good adsorption and permeability, and is suitable for various types of bleeding.
4. Polyhydroxyalkanoate sponge: made of polyhydroxyalkanoate material, it can promote blood vessel growth and repair, and is suitable for ischemic and difficult hemostasis.
5. Collagen sponge: made of animal-derived tissues such as cartilage, it has better biocompatibility and biodegradability, and is suitable for surgical hemostasis and wound repair.