[Changes in the microcirculatory vessels of the human stomach in ulcer disease].

At the ulcerous disease certain alterations in the microcirculatory bed of all the gastric wall layers take place in the zone of the ulcer and in the areas adjoining the ulcerous focus. In the gastric wall areas, remote from the ulcer, the alterations in the microcirculatory bed are poorly manifested. The most essential deviations from the norm are defined in the mucosal tunic and in the gastric tela submucosa according to the ulcer localization. The disorders in the microcirculatory bed at the ulcerous disease affect the microarchitectonics, the wall structure and the size of the microvessel lumens and their contents. Maximal alterations are observed in capillaries and postcapillary-venular portion of the microcirculatory bed, which are manifested as a considerable dilatation of the microvessels mentioned, deformity, presence of rather great protrusions of their wall. The resistive vessels of the microcirculatory bed, at the ulcerous disease, suffer to a less extent. The morphometric data have stated certain decrease of their diameter when comparing to the norm. The adaptive apparatuses of the bloodflow regulation at the ulcerous disease are essentially altered, increasing number of the arteriolovenular anastomoses is noted in the gastric wall as compared to the norm.