[The hemomicrocirculatory bed in the wall of hollow organs of the gastrointestinal tract of dogs with portal hypertension].
At portal hypertension, produced by means of experimental stenosis of the portal vein in the hemomicrocirculatory bed of hollow organs of the gastrointestinal tract, congestive phenomena and edema of walls in the organs are observed. Manifested dilatation is noted in the lumen of arterioles, venules, postcapillary venules and capillaries. At early stages after the operation average diameters of these vessels in the submucosal base of the small intestine become increased 3-7 times and they do not return to the initial size even at late stages. The precapillary sphincters are in the state of spasm. Overdistention of walls in microvessels of the venular part of the functional module results in their increased permeability, that is demonstrated as diapedesic hemorrhages. During formation of intraorganic and extraorganic peripheral pathways of the circulation, the congestive phenomena in the hemomicrocirculatory bed disappear gradually.
Dyskin
E A
EA
Gaĭvoronskiĭ
I V
IV
D000818:Animals; D004108:Dilatation, Pathologic; D004285:Dogs; D006975:Hypertension, Portal / Q000150:complications / Q000473:pathology / Q000503:physiopathology*; D007421:Intestine, Small / Q000098:blood supply* / Q000473:pathology; D008833:Microcirculation / Q000473:pathology / Q000503:physiopathology
Gemomikrotsirkuliatornoe ruslo v stenke polykh organov zheludochno-kishechnogo trakta sobaki pri portal'noĭ gipertenzii.