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intestinal obstruction lower gi disorders part 2
Terms in this set (9)
occur when the flow of intestinal content is blocked.
2 types are mechanical and nonmechanical
both of which can be partial or complete.
occurs when a blockage occurs within the intestine from conditions causing pressure on the intestinal walls such as adhesions, twisting of the bowel or strangulated hernia.
occurs when peristalsis is impaired and the intestinal contents cannot be propelled through the bowel.
-seen following abdominal surgeries trauma
mesenteric ischemia or infection.
-severity of obstruction depends on the area of bowel affected the amount of occlusion within the lumen
and the amount of disturbance in the blood flow to the bowel.
small bowel obstruction patho
a collection f contests gas and fluid occurs proximal to the obstruction.
-distention thatresults stiulates gastric secretion but decreases the absorption of fluids
-as distention worsens the intraluminal pressure causes a decrease in venous and arterial capillary pressure resulting in edema necrosis and eventually perforation of the intestinal wall.
causes of small bowel obstruction
adhesions or bands of scar tissue (most common cause of small bowel obstruction.)
hernias and neoplasms are the next most common causes followed by inflamatory bowel disease. foregin bodies strictures volvulus intussusception
occurs when the bowel twist occluding the lumen of intestintine.
occurs when peristalsis causes the intestine to telescope into itself.
ex of mechanical obstruction
occurs when the intestinal peristalsis decreases or stops because of a vascular oe neuromuscular pathological condition.
ex. paralytic or adynamic ileus
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