Hemostatic efficacy of the complex sponge and drug-loaded complex sponge

Objective To evaluate the hemostatic efficacy of complex sponge and drug-loaded complex sponge on hepatic and splenic wounds in rabbits. Methods Complex sponge was prepared by means of cross-linking and lyophilization. Then, the sponge was immersed into the tranexamic acid solution and lyophilized to obtain the drug-loaded sponge. The complex sponge and drug-loaded complex sponge were respectively used on the hepatic and splenic wounds of rabbits to observe the bleeding time and blood loss under normal and liquemine anticoagulation respectively. The gelatin sponge and the chitosan sponge were used as controls. Results Under normal condition, the hemostatic time and blood loss of the complex sponge was decreased obviously compared with the gelatin sponge （ P〈 0. 01 ） and compared with the chitosan sponge （ P 〈 0. 05 ）. Posterior to liquemine anticoagulation, the hemostatic time was increased obviously in the gelatin sponge but showed no difference for the chitosan sponge and the complex sponge. Compared with complex sponge, the hemostatic efficacy of the tranexamic acid-loaded complex sponge was improved markedly for normal rabbits. While the hemostatic efficacy showed no significant change for rabbits with coagulation disorders, when there was no linear relationship between the hemostatic efficacy and the content of tranexamic acid. Conclusions The hemostatic efficacy of the complex sponge and the drug-loaded complex sponge surpass obviously that of the gelatin sponge, especially for the rabbits with coagulation disorders. Key words: Hemostasis ;  Composite sponge;  Tranexamic acid