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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Related Questions
Correct Answer is C
Explanation
Choice a reason:
Placing the client in the Trendelenburg position, which involves lying on the back with the feet higher than the head, is not indicated for the symptoms presented. This position is typically used to treat hypotension or improve venous return to the heart, not for respiratory depression or absent deep-tendon reflexes, which are signs of magnesium sulfate toxicity.
Choice b reason:
Assessing maternal blood glucose is important in the overall care of a preeclamptic patient, especially if there is a concern for gestational diabetes. However, it is not the immediate action required when a patient exhibits signs of magnesium sulfate toxicity, such as a respiratory rate of 10/min and absent deep-tendon reflexes.
Choice c reason:
Discontinuing the medication infusion is the correct action. A respiratory rate of 10/min and absent deep-tendon reflexes are signs of magnesium sulfate toxicity. Immediate cessation of the drug is necessary to prevent further complications, such as respiratory depression or cardiac arrest. After stopping the infusion, the nurse should monitor the patient closely and prepare to administer calcium gluconate, the antidote for magnesium sulfate toxicity, if ordered by the physician.
Choice d reason:
Preparing for an emergency cesarean birth may be necessary if the fetus is in distress or if there are other obstetric indications. However, the information provided does not indicate fetal distress or an immediate need for delivery. The priority is addressing the signs of magnesium sulfate toxicity in the mother.
Correct Answer is D
Explanation
Choice A reason:
Administering oxygen via face mask is a common intervention for late decelerations; however, it is not the first-line action. Oxygen is given to improve fetal oxygenation, but repositioning the mother has a more immediate effect on improving uteroplacental blood flow and, consequently, fetal oxygenation12.
Choice B reason:
Increasing the infusion rate of IV fluid is an intervention used to expand maternal blood volume, which can improve placental perfusion. However, this is not the primary action to be taken when late decelerations are noted, as it may take time for the increased fluid to affect the uteroplacental circulation.
Choice C reason:
Elevating the client’s legs can help increase venous return to the heart, potentially improving uteroplacental circulation. Nonetheless, this is not the most immediate action to take for late decelerations, as it does not directly address the potential compression of the vena cava or aorta.
Choice D reason:
Positioning the client on her side, particularly the left side, is the priority nursing action for late decelerations. This position helps relieve pressure on the inferior vena cava, enhancing maternal cardiac output and increasing blood flow to the placenta, which can quickly improve fetal oxygenation and resolve late decelerations
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