The nurse uses a visual aid to demonstrate the process of a mechanical bowel obstruction that occurs when:
a. a tumor obstructs the lumen of the bowel.
b. a paralytic ileus causes cessation of peris-talsis.
c. the bowel is inflamed by diverticulitis.
d. the bowel motility is slowed by antidiarr-heal drugs.
A
Obstruction of the bowel may be mechanical or nonmechanical. Mechanical obstruction results in blockage of the lumen of the bowel. Nonmechanical obstruction results from the absence of peristalsis (movement of contents through the bowel stops). Mechanical obstructions include tumors, adhesions, strangulated hernia, twisting of the bowel (volvulus), telescoping of one part of the bowel into another (intussusception), gallstones, barium impaction, and intestinal parasites.
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