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Author Question: What are the fundamental pathophysiologic events that explain PPHN? 1. Vascular spasm 2. Hypoxemia ... (Read 24 times)

ARLKQ

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on: Jul 16, 2018
What are the fundamental pathophysiologic events that explain PPHN? 1. Vascular spasm 2. Hypoxemia 3. Increased muscle wall thickness 4. Decreased cross-sectional area
 
  a. 1 and 2 only
  b. 2, 3, and 4 only
  c. 1 and 3 only
  d. 1, 3, and 4 only

Question 2

What physiologic abnormality is believed to be the cause of persistent pulmonary hypertension of the newborn (PPHN)?
 
  a. Right-to-left shunting
  b. High cardiac output
  c. High pulmonary vascular resistance
  d. Metabolic acidosis


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laurnthompson

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Reply #1 on: Jul 16, 2018
Answer to Question 1

ANS: D
There are fundamental types of PPHN: vascular spasm, increased muscle wall thickness, and de-creased cross-sectional area of pulmonary vessels.

Answer to Question 2

ANS: C
The common denominator in PPHN is a return to fetal circulatory pathways, usually because of high PVR.


ARLKQ

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Reply 2 on: Jul 16, 2018
Excellent

cam1229

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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