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Pediatric surgery. Paralytic ileus (most important)

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54. Paralytic ileus

The greatest practical importance in emergency surgery in children is paralytic ileus, which is the most common and serious complication of the postoperative period.

In the presence of peritonitis (even after the elimination of the source of its origin), intestinal paresis in most cases acquires a leading role in a complex chain of developing systemic and local disorders.

The increased intra-intestinal pressure resulting from paresis exacerbates circulatory disorders in the intestinal wall.

Functional changes in intra-intestinal nerve endings are replaced by their organic damage.

Loss of fluid, proteins, electrolytes in the intestinal lumen, a violation of the absorption process in it, lead to hypovolemia, corresponding to violations of the central and peripheral hemodynamics.

The permeability of the intestinal wall increases, and there is a risk of secondary infection of the abdominal cavity. Dehydration, bacteremia close the resulting vicious circle, which is the more difficult to break, the more time has passed since the onset of paresis.

The failure of conservative treatment of postoperative intestinal paresis is mainly due to the following reasons:

1) insufficient assessment of systemic disorders that occur with paresis and their role in maintaining it;

2) the lack of sufficiently clear ideas about the nature of local pathophysiological disorders developing in the intestinal wall;

3) irrational treatment that ignores the stages of systemic and local disorders in the clinical course of postoperative paresis. The restriction of intestinal motor function that arose after surgery should probably be considered as a biologically justified, reflex protective reaction that develops in response to bacterial, mechanical or chemical irritation of the peritoneum and the nerve endings of the abdominal organs.

The chain of this reflex can be closed not only in the higher, but also in the spinal sections of the central nervous system. The latter, obviously, is due to the occurrence of intestinal paresis in pneumonia, trauma and inflammatory processes of the urinary tract.

In accordance with modern pathophysiological views, it is believed that, regardless of the causes that caused intestinal paresis, two interrelated circumstances contribute mainly to maintaining it: the degree of disturbances in the peripheral nervous apparatus and the severity of microcirculation disorders in the intestinal wall.

Authors: Drozdov A.A., Drozdova M.V.

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