| خلاصه مقاله | Uncontrollable hemorrhage leads to high mortality rates; thus, engineering effective hemostatic
materials is crucial for rapid hemostasis. Developing hemostatic materials for rapid coagulation,
antibacterial activity, and easy removal without compromising clot integrity remains a challenge.
Herein, a multifunctional hemostatic gauze was engineered by modifying regenerated cellulose
textile through multiple sequential chemical reactions, including carboxymethylation,
crosslinking with CaCl2/ZnCl2 solution, oxidation, and polymerization with dopamine. Provided
gauze demonstrated remarkable wet-tissue adhesion (890 KPa) that physically sealing the area to
prevent blood loss. The engineered gauze exhibits excellent antibacterial activity (against S.
aureus and E. coli) and enhanced hemostatic ability (clotting time (20S), attachment of red blood
cells (~93%) and platelets (~80%)). The complete hemostasis and stable clot formation without
secondary bleeding were achieved by synthesized gauze in 20s, 50s, and 100s for the rat and
rabbit liver, and rat femoral artery injury models, respectively. That was significantly faster
hemostasis (4–14-fold reduction in time) and lower blood loss (3-fold reduction) compared to the
commercial hemostatic textiles (p < 0.001). Biochemical, hematological, and pathological
examinations revealed no evidence of systemic and local inflammation or toxic effects in the rat
organs. The engineered hemostatic gauze exhibits outstanding characteristics of a hemostatic
material for clinical applications. |