Analysis of early morphological and functional perivulnar changes in the mucosa of the cecum after suturing with different surgical threads

Abstract

The correct choice of suture material is the key to successful treatment in abdominal surgery, particularly pediatric surgery. Given this, experimental studies on the effect of sutures made with different surgical threads are one of the most urgent surgery needs. The aim - to conduct a comparative analysis of early morphological and functional changes in the perivulnar region of the mucosa of the rabbit cecum after suturing with polyglactin-910 and polycaprolactone modified with L-arginine. Materials and methods. The study was conducted on 25 rabbits aged 8-10 months in compliance with all bioethical standards and recommendations. The control group consisted of 5 animals; the first experimental group, in which synthetic surgical polyfilamentous absorbable suture polyglactin-910 was used to close the wound defect, and the second experimental group, in which monofilamentous absorbable suture polycaprolactone modified with L-arginine was used to close the wound defect, consisted of 10 rabbits each. All stages of surgical access and sampling of intact cecal wall tissues were performed in the control group. The rabbits of the experimental groups underwent colotomy followed by suturing of the large intestine with appropriate suture material. Each experimental group was divided into two subgroups (5 rabbits in each), in which the condition of the perivulvar region was studied on days 3 and 7, respectively. The animals were not euthanised; during the second operation, tissues of the cecum were taken from the sutured area and the formed scar at the appropriate time. Histological, semi-thin serial sections, electron microscopic, morphometric, and statistical methods were used. Discussion. The average thickness of the cecal mucosa after colotomy increased significantly on days 3-7 when using both surgical threads, but when using polycaprolactone modified with L-arginine, the above indicator was 63.06% and 22.46% lower, respectively, due to a decrease in hyperhydration of the connective tissue component of the mucosa, leukocyte infiltration in the perivulnar area and acceleration of reparative processes. Conclusions. Polycaprolactone modified with L-arginine has a positive effect on the course of morphological and functional processes in the perivulnar region of the rabbit cecum's mucosa. In terms of its characteristics, it is not worse than polyglactin-910. No conflict of interests was declared by the authors.