Experimental Simulation of Compression Anastomosis in Double-Barreled Enterostomy Using a Titanium Nickelide Memory Shape Device
Introduction. Enterostomy remains a relevant option of staged treatment of small intestine diseases in children. T-anastomosis with stoma (Bishop-Koop) and double-barreled enterostomy with compression anastomosis (Mikulicz) are among the most widely accepted ones. Disadvantages of compression anastomosis can be eliminated by using a NiTi-clip with shape memory. The aim of the study was to perform an experimental study to detect effectiveness and advantages of NiTi-clip application in formation of a compression anastomosis in a double-barreled enterostomy compared with manual T-anastomosis. Methods. The study included 24 rabbits of the "Serebristyi" breed, aged 2.5-3 months, weighed 2790-3100 g; they were divided into two equal groups. Autopsy was performed in 10, 14, 21 days with pneumopression and histological examination. Differences were considered statistically significant at p-value <0.05. Results. The duration of the Mikulicz operation (group A) was significantly shorter than that of Bishop-Koop`s (group B) (p = 0.000). Significant differences in weight were found in 14. 21 days, with a predominance in group A (p = 0.029). Complications included wound suppuration, eventration, peritonitis, evagination, dermatitis, and anastomotic leakage. In 10 days, compression anastomosis had a lower anastamotic pressure, but in 21 days, it was more stabile than in manual anastomosis (p = 0.019). In 14 days, inflammatory changes in the mucosa with fibrosis in the muscle layers and lesions were detected in the area of manual anastomosis, they were accompanied by inflammation around sutures. In 21 days, fibrotic changes spread in all layers. Proliferation prevailed over inflammation in the area of the compression anastomosis. Conclusions. Double-barreled stoma formation with NiTi-clip application took less time than T-anastomosis. Animals with a double-barreled stoma and compression anastomosis had a larger weight gain. Compression anastomosis with NiTi-clip in the stoma was stabile than manual anastomosis. With compression anastomosis, layer-by-layer regeneration from serous to mucous membrane occurs, healing occurred faster, with a predominance of proliferation processes, the risk of stenosis decreased. The use of NiTi-clip in the surgical treatment of children with double-barreled enterostomy can be recommended for practical use.