Résumé
BACKGROUND:The thermosensitive chitosan is a kind of chitosan, its hemostatic effect, tissue compatibility andin vivo absorption need further investigations. OBJECTIVE:To investigate the hemostasis,in vivo degradation and tissue compatibility of thermosensitive chitosan hemostatic film. METHODS: A total of 48 Sprague-Dawley rats were randomly divided into four groups, and carried out two experiments at the same time. (1) The incisions of the liver in three groups were covered with the thermosensitive chitosan hemostatic film, celulose hemostatic cotton and gelatin sponge, respectively. Blank control group received no treatment. The bleeding time and bleeding amount were recorded. (2) The incisions of the quadriceps femoris muscle of rats in the above three groups were embedded with the same hemostatic materials respectively. Blank control group was not embedded. At 1, 2, 3, 4, 6 weeks, the incision tissues of the liver and the quadriceps femoris muscle were harvested for observation. After 4 weeks, the incisions were observed with hematoxylin- eosin staining and transmission electron microscopy. RESULTS AND CONCLUSION: The bleeding time and bleeding amount of thermosensitive chitosan hemostatic film and celulose hemostatic cotton groups were significantly lower than those of gelatin sponge and blank control groups (P microscopy, the liver cels had integral structure, cellnucleus and organeles remained intact. The muscle fibers showed complete structure and little inflammatory cellinfiltration. Under transmission electron microscopy, the muscle fibers ranked tidily, with integral cellnucleus and organeles. The thermosensitive chitosan hemostatic film has good hemostasis effect and tissue compatibility.