Retinopathy of prematurity often occurs in neonates because of ...

[jrubin]

Retinopathy of prematurity often occurs in neonates because of which of the following?
 
  a. Increased amounts of FIO2
  b. Low amounts of FIO2
  c. Improper placement of the oxy-gen-delivery device
  d. Hyperventilation

Question 2

What is the percentage of FIO2 for a patient on 3 L/min delivered through a nasal cannula?
 
  a. 32 c. 44
  b. 40 d. 50

[Kdiggy]

Answer to Question 1

ANS: A
The origin of retinopathy of prematurity, especially with regard to the role of oxygen, is contro-versial. Nonetheless, care should be taken when supplemental oxygen is provided to preterm in-fants (<37 weeks' gestation). it is suggested that oxygen supplementation should not result in a pao2>80 mm Hg.

Answer to Question 2

ANS: A
3 L/min  4 = 12 L/min + 20 = 32 FIO2. The flow is multiplied by 4 because for every 1 L/min of oxygen flowing to a nasal cannula the FIO2 increases by 4. The 20 is the number that the flow multiplied by 4 is added to, in order to get the approximate FIO2.

[jrubin]

TYSM

[brbarasa]

Excellent