Introduction. The major task during surgical interventions on liver is achieving quick and safe haemostasis. The scientists have been searching for the optimal technique for haemostasis up to the present.
Aim. To evaluate coagulative capacities of convection-infrared thermosurgical technology under different temperature regimens by assessing the diameter of vessels of coagulated layer of liver parenchyma.
Materials and methods. There were analysed results of experimental study on 25 outbred rabbits of different gender and age, with the weight of the body from 3350.0 g to 4180.0 g, average weight — 4000.0 g. The experiment involved resection of liver with coagulation of resection margin using convection-infrared thermosurgical technology (CITT) under temperature regimes of 400, 500, 600°С. Depending on the temperature of coagulation there were formed 3 groups: group 1 — tflow of 400°С; group 2 — tflow of 500°С; group 3 — tflow of 600°С. There were analysed data of histologic examination. Statistical analysis was performed with the help of SPSS Statistics 20.
Results. The study showed that the diameter of coagulated arteries is 18.93 (18.59–20.03.64) µm in group 1 (400°С), 35.07 (33.66–35.37) µm in group 2 (500°С) and 43. 68 (42.99–44.55) µm in group 3 (600°С) (р=0. 001). The diameter of coagulated central veins in group 1 (400°С) is 13.92 (13.28–14.77) µm, group 2 (500°С) — 44.87 (44.01–45.36) µm and 48.76 (47.44–49.62) µm in group 3 (600°С) (р=0.001). The site of evident thermal injury is 2742.2 (2697.6–2857.68) µm in group 1 (400°С), 3396.42 (3040.13–3679.9) µm in group 2 (500°С) and 511.2 (493.16–540.35) µm in group 3 (600°С) (р=0.001).
Conclusion. There was used CITT under temperature regimes of 400, 500, 600°С during resection margin of liver in experimental study. It showed that CITT under temperature regimes of 400°С has the least coagulative capacity, and 600°С has the highest coagulative capacity.