A nurse is caring for a client who has just delivered her first newborn. The nurse anticipates hyperbilirubinemia due to Rh incompatibility. The nurse should understand that hyperbilirubinemia occurs with Rh incompatibility for which of the following reasons?
The client's blood does not contain the Rh factor, so she produces anti-Rh antibodies that cross the placental barrier and cause hemolysis of red blood cells in newborns.
The client's blood contains the Rh factor, and the newborn's does not, and antibodies that destroy red blood cells are formed in the fetus.
The client has a history of receiving a transfusion with Rh-negative blood.
The client's anti-A and anti-B antibodies cross the placenta and cause the destruction of the fetal red blood cells.
The Correct Answer is A
Choice A rationale:
Rh incompatibility occurs when an Rh-negative client is exposed to Rh-positive fetal blood, typically during a prior pregnancy or delivery. The client’s immune system produces anti-Rh antibodies that cross the placenta in subsequent pregnancies, attacking the Rh-positive red blood cells of the fetus. This hemolysis releases bilirubin, leading to hyperbilirubinemia in the newborn.
Choice B rationale:
Rh incompatibility only occurs when the client is Rh-negative and the fetus is Rh-positive. An Rh-positive client will not form antibodies against an Rh-negative fetus, as their immune system recognizes the Rh factor as normal.
Choice C rationale:
This choice is not related to the mechanism of Rh incompatibility. Receiving a transfusion with Rh-negative blood would not cause the mother's immune system to produce anti-Rh antibodies or lead to Rh incompatibility with her newborn.
Choice D rationale:
This choice describes the ABO blood group system, not the Rh factor. ABO incompatibility can occur when a mother with blood type O (producing anti-A and anti-B antibodies) has a newborn with blood type A, B, or AB, leading to hemolysis of the fetal red blood cells. However, the question specifically mentions Rh incompatibility, which involves the Rh factor, not the ABO system.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale:
Monitoring fluid intake is important for any newborn, but it is not the priority intervention for a small for gestational age (SGA) newborn. SGA infants are at risk of hypoglycemia due to limited glycogen stores, and monitoring blood glucose levels is crucial in identifying and managing hypoglycemia.
Choice B rationale:
Monitoring axillary temperature is essential for all newborns to assess their thermoregulation. However, it is not the priority intervention for an SGA newborn. Hypoglycemia is a more immediate concern and must be addressed promptly.
Choice C rationale:
Monitoring blood glucose levels is the priority intervention for an SGA newborn. As mentioned earlier, SGA infants are at higher risk of hypoglycemia, which can lead to serious complications if not managed appropriately. By monitoring blood glucose levels, the nurse can detect and address hypoglycemia early.
Choice D rationale:
Monitoring weight is important for tracking the growth and development of the newborn, but it is not the priority intervention in this scenario. The immediate concern for an SGA newborn is their blood glucose levels.
Correct Answer is B
Explanation
Choice A rationale:
An axillary temperature of 36.5°C (97.7°F) is within the normal range for a newborn. Normal axillary temperature for a newborn is typically between 36.5°C to 37.5°C (97.7°F to 99.5°F).
Choice B rationale:
This is the correct choice. Nasal flaring in a newborn is a concerning sign and may indicate respiratory distress. It suggests that the baby is having difficulty breathing and should be reported to the provider for further evaluation.
Choice C rationale:
A heart rate of 158/min is within the normal range for a newborn. The normal heart rate for a newborn can range from 100 to 160 beats per minute.
Choice D rationale:
Having one void since birth is not a concerning finding for a 10-hour-old newborn. In the early hours of life, the frequency of voids may vary, but the baby should have an increasing number of wet diapers in the following days.
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