A nurse is caring for a client who is 6 hours postpartum. The client is Rh-negative and her newborn is Rh-positive. The client asks why an indirect Coombs test was ordered by the provider. Which of the following is an appropriate response by the nurse?
"It detects positive antibodies in the mother's blood."
"It detects Rh-negative antibodies in the newborn's blood."
"It determines if kernicterus will occur in the newborn."
"It determines the presence of maternal antibodies in the newborn's blood."
The Correct Answer is A
Choice A reason: The indirect Coombs test is used to screen for antibodies in the mother's blood that could potentially cause hemolytic disease in the newborn if they are Rh-positive. A positive result indicates that the mother has developed antibodies that could cross the placenta and attack the red blood cells of an Rh-positive fetus.
Choice B reason: The indirect Coombs test does not detect Rh-negative antibodies in the newborn's blood. Instead, it is used to detect antibodies in the mother's blood. The direct Coombs test is used to detect antibodies that are already attached to the red blood cells of the newborn.
Choice C reason: The indirect Coombs test does not determine if kernicterus will occur in the newborn. Kernicterus is a form of brain damage that can result from very high levels of bilirubin in a baby's blood. It is not directly related to the presence of antibodies detected by the indirect Coombs test.
Choice D reason: The indirect Coombs test does not determine the presence of maternal antibodies in the newborn's blood. This is assessed by the direct Coombs test, which checks for antibodies bound to the surface of the newborn's red blood cells, indicating that the immune system is attacking them.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A reason:
Precipitous labor is characterized by a labor that progresses rapidly and ends within three hours of its onset. It is not typically associated with painless, bright red vaginal bleeding. This condition is more likely to present with intense, frequent contractions and a rapid change in cervical dilation. Therefore, precipitous labor is not the correct answer in this scenario.
Choice B reason:
Abruptio placentae, also known as placental abruption, is a condition where the placenta detaches from the uterus before delivery. It can cause significant maternal and fetal complications. The classic presentation includes painful bleeding, uterine tenderness, and contractions. Given that the scenario describes painless bleeding, abruptio placentae is less likely to be the correct diagnosis.
Choice C reason:
Placenta previa is a condition where the placenta covers the cervix partially or completely. The hallmark sign of placenta previa is painless, bright red vaginal bleeding, which aligns with the scenario provided. This bleeding can occur spontaneously or be triggered by intercourse or a medical exam. Placenta previa is a serious condition that can lead to maternal and fetal hemorrhage and warrants immediate medical attention. Based on the information provided, placenta previa is the most likely diagnosis for the client described.
Choice D reason:
Threatened abortion refers to vaginal bleeding that occurs in the first 20 weeks of pregnancy, which may indicate a potential miscarriage. Since the client is at 36 weeks gestation, threatened abortion is not a relevant diagnosis for late-term bleeding. Additionally, threatened abortion is often accompanied by abdominal cramping, which is not mentioned in the scenario.
Correct Answer is B
Explanation
Choice A reason:
This choice is incorrect because the hepatitis B vaccine is recommended to be given within 24 hours of birth, but there is no recommendation for hepatitis B immune globulin (HBIG) to be given every 12 hours for 3 days. The HBIG is typically given as a single dose.
Choice B reason:
This is the correct choice. Newborns whose mothers are positive for the hepatitis B surface antigen should receive both HBIG and the first dose of the hepatitis B vaccine within 12 hours of birth. The HBIG provides immediate protection against hepatitis B infection, and the vaccine begins the process of building long-term immunity.
Choice C reason:
This choice is incorrect because delaying the administration of HBIG and the hepatitis B vaccine until 1 week after birth would leave the newborn vulnerable to hepatitis B infection. The recommended schedule is to administer these within 12 hours of birth.
Choice D reason:
This choice is incorrect because the hepatitis B vaccine is not given monthly. The typical schedule for the hepatitis B vaccine is the first dose at birth, the second dose at 1-2 months of age, and the third dose at 6 months of age. Additionally, the vaccine is not administered based on the newborn's hepatitis B surface antigen status.
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