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Use of a local hemostatic agent based on chitosan and external compression of the abdominal area to control intra-abdominal bleeding

The paper presents the intermediate results of an experimental study of three samples of chitosan-based local hemostatic agent in a model of intense intra-abdominal bleeding in an average-sized experimental animal (a Soviet Chinchilla rabbit) with a standard wound on the parenchymal organ (liver) in combination with external compression of the abdominal area to achieve hemostasis in the acute phase of the experiment. At the first stage, nine experimental groups and one control group, with three biological objects each, were involved (n = 30). The composition and properties of laboratory preparations of hemostatics were different from the concentration of the main component. To select the optimal sample of a local hemostatic agent with the least local irritant effect on the organs and structures of the abdominal cavity, three experimental groups with three animals each were formed at the second stage, without modeling blood loss (n = 9) with follow-up from 24 to 72 h. The studied drugs have high hemostatic activity in the model of intense intra-abdominal bleeding with follow-up periods from several hours to 3 days. Moreover, intraperitoneal administration of hemostatic agent samples does not lead to a pronounced local irritant effect. However, during the first 180 min of the experiment, only one fatal outcome was recorded in a group of animals with 15% chitosan in the studied drug because of a technical error in modeling the source of bleeding. External compression of the abdominal area demonstrated its effectiveness as an auxiliary technique for temporary control of the intra-abdominal source of bleeding in the experimental model. The objectification of the obtained results was achieved through a control sectional study and laboratory screening of peripheral blood indicators of experimental animals at different stages of the experiment. To further evaluate the hemostatic activity of chitosan-based drugs, creating an experimental model using a large experimental animal is necessary.