A nurse is caring for a client who is pregnant and Rh-negative. The nurse should plan to monitor which of the following maternal laboratory test results to determine maternal-fetal blood incompatibility?
Homocysteine.
Indirect Coombs.
Erythropoietin.
aPTT.
The Correct Answer is B
The indirect Coombs test is used to detect antibodies against foreign red blood cells in the maternal serum. This test can help identify maternal-fetal blood incompatibility, which can cause hemolytic disease of the newborn.
Choice A is wrong because homocysteine is a type of amino acid and is not related to blood compatibility.
Choice C is incorrect because erythropoietin is a hormone that regulates red blood cell production and is not a specific test for detecting maternal-fetal blood incompatibility.
Choice D is not the correct answer as aPTT (activated partial thromboplastin time) is a test used to evaluate blood clotting factors and is not directly related to monitoring maternal-fetal blood incompatibility.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
The nurse should notify the provider because this value is lower than the normal range of 150,000 to 450,000 platelets per microliter of blood. A low platelet count can indicate a risk of bleeding or a condition such as thrombocytopenia or disseminated intravascular coagulation (DIC).
Choice B is wrong because WBC count 9,800/mm³ is within the normal range of 4,500 to 11,000 cells per microliter of blood.
Choice C is wrong because Hgb 13 mg/dL is within the normal range of 12 to 16 mg/dL for females and 14 to 18 mg/dL for males.
Choice D is wrong because Hct 42% is within the normal range of 37% to 47% for females and 42% to 52% for males.
Correct Answer is D
Explanation
Place the newborn on a flat surface and clap hands loudly.
This action will elicit the Moro reflex, also known as the startle reflex, which is a normal, involuntary reaction that newborns and infants have when they’re startled. In response to the sound, the baby will throw back his or her head, extend out his or her arms and legs, cry, then pull the arms and legs back in.
Choice A is wrong because placing the newborn on their abdomen and observing the movement of their extremities will not trigger the Moro reflex.
This position may elicit other reflexes such as the crawling reflex or the tonic neck reflex.
Choice B is wrong because stroking the newborn’s cheek toward their mouth will not trigger the Moro reflex. This action will elicit the rooting reflex, which helps the baby find the breast or bottle to start feeding.
Choice C is wrong because stroking upward on the lateral aspect of the newborn’s foot will not trigger the Moro reflex. This action will elicit the Babinski reflex, which causes the big toe to extend upward and the other toes to fan out.
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