Which of the following are associated with an increased risk of ...

[audie]

Which of the following are associated with an increased risk of developing RDS?
 
  1. Lowbirth weight infant
  2. Prenatal asphyxia
  3. Maternal bleeding
  4. Second-born twin
  a. 1, 2
  b. 3, 4
  c. 2, 3, 4
  d. 1, 2, 3, 4

Question 2

A patient with RDS has alveolar hypoxia and pulmonary vasoconstriction. How will this affect his blood flow?
 
  1. Blood shunts through the foramen ovale
  2. Increased systemic blood flow
  3. Blood shunts through the ductus arteriosus
  4. Decreased blood flow to the gut
  a. 2, 4
  b. 1, 3
  c. 1, 2, 3
  d. 1, 2, 3, 4

[polinasid]

Answer to Question 1

D
All of the listed conditions, and others, increase the risk of the neonate developing RDS.

Answer to Question 2

B
As a consequence of alveolar hypoxia, the neonate can develop pulmonary vasoconstriction and transient pulmonary hypertension. This will lead to a right-to-left shunt as blood flows through the foramen ovale and ductus arteriosus. This results in a partial return to fetal circulation. There is no change in systemic blood flow and flow to the gut.