Mechanical ventilation has an effect on the hormone ...

[BrownTown3]

Mechanical ventilation has an effect on the hormone _____________, which causes a decrease in urinary output.
 
  a. cortisol
  b. arginine vasopressin
  c. parathyroid hormone
  d. thyroid-stimulating hormone

Question 2

Positive pressure ventilation increases splanchnic resistance, decreases splanchnic venous out-flow, and may contribute to gastric mucosal ischemia, which can contribute to which of the fol-lowing?
 
  a. Liver metastases
  b. Gastric mucosal ischemia
  c. Gastric ulcers
  d. Increased portal blood flow

[Ksh22]

Answer to Question 1

ANS: B
Several different types of hormones may influence urine output during mechanical ventilation. Specifically, these include ADH, atrial natriuretic factor, and the renin-angiotensin-aldosterone cascade. Increases in the release of ADH, also called arginine vasopressin, from the posterior pi-tuitary can reduce urine production by inhibiting free water excretion.

Answer to Question 2

ANS: C
PPV increases splanchnic resistance, decreases splanchnic venous outflow, and may contribute to gastric mucosal ischemia, which can increase the risk of gastrointestinal bleeding and gastric ul-cers. Both of these conditions are complications frequently seen in critically ill patients.