COMPARATIVE HISTOLOGICAL CHARACTERISTICS OF CHANGES IN ANTERIOR ABDOMINAL WALL TISSUES AFTER IMPLANTATION OF «CAPROMESH» MESH IN COMBINATION WITH PRP AND «LIGHT» POLYPROPYLENE MESH IN AN EXPERIMENT

Abstract

A systematic review of a recently published meta-analysis shows that laparoscopic and open allogeneoplasty is a safe procedure with relatively short-term and long-term results. A new minimally invasive technique has been developed that allows the mesh to be placed in the retroperitoneal space through a small transhernial incision, avoiding signifi cant trauma to the abdominal wall and contact with the abdominal cavity. However, this type of operation does not involve fi xation of the mesh in the retromuscular space, which can lead to a number of complications. The analysis of the obtained results determines the relevance of this study.Objective. To compare the features of the ultrastructural reaction of the tissues of the muscle- aponeurotic layer of tissues to the implantation of «Capromesh» in combination with PRP and polypropylene meshes in an experiment.Material and methods. The study was conducted on 16 same-sex pigs of the Vietnamese breed weighing at least 10 kg, which were divided into 2 groups. Histological and ultrastructural changes in the tissues of the muscle- aponeurotic layer of the anterior abdominal wall after implantation in the retromuscular space of «Capromesh» in combination with PRP (plasma enriched with growth factors) and polypropylene meshes were studied in the experiment.The results. A signifi cant diff erence in tissue reactions at diff erent times of the experiment on the implanted material was proven. The conducted microscopic and electron microscopic studies after the implantation of the «Capromesh» mesh in combination with PRP established that starting from the 7th day of the experiment, the infl ammatory changes in the tissues of the muscle- aponeurotic layer are not as signifi cant as during the implantation of the polypropylene mesh. Starting from the 14th day of the experiment, the signs characterizing the reduction of the infl ammatory reaction and the more intense formation of fi brous structures around the mesh material are much better expressed. On the 21st day of the experiment, at the microscopic and electron microscopic levels, a signifi cantly smaller number of areas of leukocyte infi ltration, intensive vascularization from the formation of collagen fi bers with the participation of fi broblasts around the «Capromesh» mesh material in combination with PRP was established.Conclusions. The conducted micro- and ultrastructural studies determined the priority of using the «Capromesh» mesh in combination with PRP under the conditions of material selection when performing retromuscular allogeneoplasty.