MORPHOMETRIC STUDY OF STRUCTURAL CHANGES IN VESSELS OF THE HEMOMICROCIRCULATORY BED OF THE URINARY BLADDER AT POSTRESECTION PORTAL HYPERTENSION

of the Ministry of Health of Ukraine "Structural and functional regularities of the course of adaptation and compensatory processes in organs and systems during surgical interventions on the abdominal and thoracic cavities under the influence of toxic endogenous and exogenous factors" (state registration number 0122U000031).Introduction.Microvessels play an important role in the morphogenesis of organs in various physiological and pathological conditions of the body.They supply arterial blood to tissues and cells, carry out transcapillary metabolism, and drain venous blood and metabolic products [1,2,3].It is also known that changes in hemodynamics in the hepatic vein portal system, which can occur after resection of large liver volumes [4,5], are also interrelated with the large and small circulation circles and can significantly affect blood flow in them [6,7].The bladder is an important organ of the genitourinary system, which is often affected by various pathological processes and responds to hemodynamic changes [8].At the same time, this organ's morphogenesis in portal hypertension conditions is poorly understood.