BACKGROUND
Despite the use of antibiotics and metal nanoparticles, mortality in surgical treatment of local limited peritonitis (LLP) remains high, therefore, it is advisable to develop a new method of using photodynamic therapy (PDT) in the postoperative period.
OBJECTIVE
To substantiate a new method of using PDT in postoperative treatment of simulated MOP.
MATERIAL AND METHODS
The material for this study was 80 white laboratory rats weighing 200±50 g, which were divided into four groups (20 animals in each). After modeling MOP, the animals of all experimental groups underwent opening, sanitization and drainage of the purulent cavity. In the postoperative two-week period of MOP treatment, laboratory, planimetric, microbiological and instrumental research methods were used. In the control group, standard sanitization of the cavity and antibiotic treatment were performed. In the second group, the cavity was treated with a mixture of intralipid solutions and low-intensity laser radiation (LILI). In the third group, the MOP cavity was treated with metal nanoparticles in an intralipid solution followed by LILI. PDT in the treatment of localized peritonitis in animals of the fourth group included a mixture of intralipid and methylene blue solutions (as a photosensitizer) and irradiation with red LED radiation.
RESULTS
When comparing the results obtained by the 14th day of treatment of localized peritonitis, only in animals of the fourth group normalization of the OAC parameters, complete suppression of microflora growth, obliteration of the cavity due to proliferation, replacement with collagen fibers and connective tissue were achieved.
CONCLUSION
A treatment method that allows complete obliteration of the localized peritonitis cavity and shortening the treatment period has been experimentally substantiated.