Which of the following trends in the hematologic status of a 6-week-old infant (born at 32 weeks' gestation) most clearly warrants medical intervention?
A) Decreasing red blood cell counts
B) Increasing HgA levels
C) Decreasing mean corpuscular volume (MCV)
D) Extremely low hematocrit
Ans: D
Feedback:
Signs and symptoms include apnea, poor weight gain, pallor, decreased activity, and tachycardia. In infants born before 33 weeks' gestation or those with hematocrits below 33%, the clinical features are more evident. Decreasing red blood cell counts, hematocrit, and MCV are normal postnatal findings. Levels of HgA rise gradually following delivery.
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