A macroporous composite sponge with high water absorbency and active coagulation mechanism for traumatic hemostasis...

The development of a composite sponge with high water absorbency and active coagulation mechanism for traumatic hemostasis and anti-infection remains a challenge. Herein, we developed a composite sponge using gelation, swelling, and freeze-drying methods based on quaternized chitosan, succinimidyl-modified F127, and bioactive glass. The sponge exhibited macroporous structure, high porosity, and water absorbency. When exposed to blood, it strongly interacted with blood cells, promoting their adhesion, aggregation, and activation. Moreover, it activated the intrinsic coagulation pathway. The sponge/powder demonstrated superior hemostatic capacity to commercial gauze, gelatin sponge, Yunnan Baiyao, and chitosan hemostatic powder in rat tail amputation, liver superficial injury, liver resection, and liver semi-perforation wound models. The sponge also presented robust anti-infection activity against methicillin-resistantStaphylococcus aureusandEscherichia coli. Additionally, the sponge showed low cytotoxicity, hemolysis activity, inflammation response, and systemic toxicity, demonstrating its favorable biocompatibility.