EVALUATION OF THE FUNCTIONAL PROPERTIES OF A BIOLOGICAL CASE FOR IMPLANTABLE CARDIAC DEVICES, IMPREGNATED WITH BIOACTIVE SUBSTANCES IN AN EXPERIMENT ON LARGE LABORATORY ANIMALS

Aim. The purpose of the experimental study was to determine the functional properties of the case with antibacterial and hemostatic preparations impregnated on it, to assess the biological safety and the effectiveness of using this medical device in an in vivo model on large laboratory animals (pigs).Material and Methods. The article presents the first results of an experimental study of a domestic extracellular collagen matrix-based biological case “Bio-NEST” for implantable cardiac devices, impregnated with bioactive substances, in an in vivo experiment on large laboratory animals. The experiment was conducted in three chronological stages to analyze and evaluate the safety, efficacy, and histological compatibility of the biological sheath during implantation and reimplantation of cardiac devices using bioactive substances (antibacterial, hemostatic, and their combinations) as well as under the conditions of the established model of infection with pathogenic microflora implant pocket.Results. Results of the study showed that the use of the experimental cover sample was safe for a laboratory animal. Experimental samples were biocompatible and did not cause inflammatory and immune responses. Implantation of cardiac devices in the sample of the case allowed preventing implant migration and development of infectious inflammation of the implant bed when the experimental cover was impregnated with a solution of rifampicin and aminocaproic acid.