After a partial gastrectomy or pyloroplasty,clinical manifestations that include increased pulse,hypotension,weakness,pallor,sweating,and dizziness are the results of which mechanism?
A) Anaphylactic reaction in which chemical mediators, such as histamine, prostaglandins, and leukotrienes, relax vascular smooth muscles, causing shock
B) Postoperative hemorrhage during which a large volume of blood is lost, causing hypotension with compensatory tachycardia
C) Concentrated bolus that moves from the stomach into the small intestine, causing hyperglycemia and resulting in polyuria and eventually hypovolemic shock
D) Rapid gastric emptying and the creation of a high osmotic gradient in the small intestine, causing a sudden shift of fluid from the blood vessels to the intestinal lumen

Question

Quizplus · Accepted Answer

Dumping syndrome occurs with varying severity in 5% to 10% of individuals who have undergone partial gastrectomy or pyloroplasty.Rapid gastric emptying and the creation of a high osmotic gradient in the small intestine cause a sudden shift of fluid from the vascular compartment to the intestinal lumen.Plasma volume decreases,causing vasomotor responses,such as increased pulse rate,hypotension,weakness,pallor,sweating,and dizziness.Rapid distention of the intestine produces a feeling of epigastric fullness,cramping,nausea,vomiting,and diarrhea.This selection is the only option that accurately identifies the mechanism responsible for the described situation.

After a Partial Gastrectomy or Pyloroplasty,clinical Manifestations That Include Increased