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 A
Explanation
Choice A rationale:
Naegele's Rule is used to estimate the expected delivery date (EDD) by adding 7 days and 9 months to the first day of the last menstrual period (LMP) In this case, May 4th, 2018, is the first day of the LMP. Adding 7 days brings us to May 11th, and then adding 9 months brings us to February 11th, 2019, which is the estimated delivery date.
Choice B rationale:
This option is incorrect because it adds 9 months to the LMP without accounting for the additional 7 days, resulting in an inaccurate EDD.
Choice C rationale:
This option is incorrect because it only adds 9 months to the LMP without considering the 7 days, leading to an inaccurate EDD.
Choice D rationale:
This option is incorrect because it adds 9 months to the LMP without considering the 7 days, resulting in an inaccurate EDD.
Correct Answer is ["A","E"]
Explanation
Choice A rationale:
Nulliparity (never having given birth) is a known risk factor for ovarian cancer. Women who have never had children have a higher risk compared to those who have. This is believed to be associated with the number of ovulatory cycles a woman experiences throughout her lifetime.
Choice B rationale:
History of breastfeeding does not have a direct link to ovarian cancer risk. In fact, breastfeeding is associated with a reduced risk of both breast and ovarian cancer due to hormonal changes that occur during lactation.
Choice C rationale:
Previous use of oral contraceptives is associated with a decreased risk of ovarian cancer. Women who have used birth control pills have a lower risk compared to those who have never used them. The protective effect is believed to be due to the suppression of ovulation.
Choice D rationale:
History of breast cancer is not a risk factor for ovarian cancer. Although both cancers are related to the reproductive system, they have distinct risk factors and characteristics.
Choice E rationale:
Hormone replacement therapy (HRT) is a potential risk factor for ovarian cancer, especially long-term use. The hormones used in HRT can affect hormone levels and may increase the risk of ovarian cancer.
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