Intestinal microvessels in patients of different ages after an appendectomy

: The numbers and diameters of microcirculatory bed vessels located in the wall of various regions of small and large intestine, were determined in 43 patients of lirst and second mature ages and in 19 aged and senile patients less than one year - more than ten years after an appendectomy. In was established that during the first year following the operation, the number of arterioles, capillaries and venules per standard area of the section in middle-aged patients was increased in the wall of caecum and ileo-caecal transition with a concomitant increase in the lumen of these vessels. These changes were most pronounced in capillaries, while arterioles were less affected. Vascular changes were expressed in the wall of caecum close to post-operational scar and in the wall of ileo-caecal transition, but in the wall of middle part of small intestine and middle part of colon transversum they disappeared. Three years following the operation, the numbers of microcirculatory bed vessels and their luminal diameters were similar to those found in people with an intact appendix. The changes described were not detected in aged and senile persons.