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 B
Explanation
Choice A rationale:
Multiparity, or having given birth to multiple children, is associated with a decreased risk of ovarian cancer, not an increased risk. The protective effect may be due to the repeated ovulatory cycles that occur during pregnancy.
Choice B rationale:
Endometriosis is a condition where endometrial tissue grows outside the uterus. It is associated with an increased risk of ovarian cancer. The exact link is not fully understood, but it is believed that the inflammatory and hormonal changes in endometriosis may contribute to cancer development.
Choice C rationale:
Being under 40 years of age does not increase the risk of ovarian cancer. Advanced age is a known risk factor for ovarian cancer, with the highest incidence occurring in women over 60.
Choice D rationale:
Use of contraceptive medications, particularly oral contraceptives, has been shown to reduce the risk of ovarian cancer. These medications suppress ovulation and decrease the exposure of the ovaries to potential carcinogens.
Correct Answer is B
Explanation
Choice A rationale:
This statement is incorrect. A nonstress test does not involve receiving medication through an
IV. It is a simple and non-invasive test that monitors the baby's heart rate in response to its movements.
Choice B rationale:
This is the correct choice. A nonstress test typically takes about 30 minutes to complete. During the test, the client will have a fetal heart rate monitor placed on her abdomen to measure the baby's heart rate while it is moving.
Choice C rationale:
This statement is incorrect. There is no requirement for the client to fast or restrict food and drink before a nonstress test. The client can eat and drink as usual before the procedure.
Choice D rationale:
This statement is incorrect. A nonstress test is not used to determine if the baby's lungs are mature. Instead, it assesses the baby's heart rate patterns in response to its own movements, which helps evaluate the baby's overall well-being in the third trimester of pregnancy.
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