Question

While caring for a postterm infant, a nurse recognizes that the elevated hematocrit level most likely results from?

1) Hypoxia in utero
2) Underproduction of red blood cells
3) Increased breakdown of red blood cells
4) The normal expected shift from fetal hemoglobin to normal hemoglobin

Answer 1

The elevated hematocrit level in a postterm infant is most likely the result of hypoxia in utero, which can lead to polycythemia.

Step-by-step explanation:

The elevated hematocrit level in a postterm infant is most likely the result of hypoxia in utero. During fetal development, the fetus relies on fetal hemoglobin, which can bind with oxygen at lower pressures. However, after birth, the lungs start functioning, and the transition from fetal hemoglobin to normal hemoglobin occurs. If there was oxygen deprivation in utero, it can lead to polycythemia, causing an elevated hematocrit level.