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cgorski4 cgorski4
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6 years ago
Prolonged periods of hyperoxygenation that cause retinal vasoconstriction are known as:
 
  a. Intraventricular hemorrhage
  b. Glaucoma
  c. Cataracts
  d. Retinopathy of prematurity
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6 years ago
ANS: D
Prolonged periods of hyperoxygenation (partial pressure of oxygen PaO2 levels greater than 90 to 100 mm Hg) can be dangerous to the newborn because the condition produces oxygen toxicity. Oxygen toxicity can cause vasoconstriction and leakage in the vessels of the retina and retinal detachment, resulting in retinopathy of prematurity (ROP), previously called retrolental fibroplasia, which can lead to loss of vision or blindness.
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