A nurse is caring for a client who is 6 hr 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?

Choice A reason: Hypoglycemia is a low blood sugar level that can affect newborns, especially those who are premature, small for gestational age, or have diabetic mothers. However, hypoglycemia does not explain the high FHR, the low Apgar scores, or the pale and tachypneic appearance of the newborn.

Choice B reason: Phrenic nerve injury is a rare complication of cesarean section that can cause diaphragmatic paralysis and respiratory distress in the newborn. However, phrenic nerve injury usually affects only one side of the chest, and does not cause high FHR, low Apgar scores, or pallor.

Choice C reason: Sepsis is a serious infection that can affect newborns, especially those who are exposed to prolonged rupture of membranes, as in this case. Sepsis can cause high FHR, low Apgar scores, pale and tachypneic appearance, and other signs of shock and organ failure.

Choice D reason: Meconium aspiration syndrome is a condition where the newborn inhales meconium-stained amniotic fluid into the lungs, causing respiratory distress. However, meconium aspiration syndrome usually occurs in term or post-term infants, and is associated with low FHR, not high FHR. Meconium aspiration syndrome also causes cyanosis, not pallor.

Choice A reason: Disseminated intravascular coagulation (DIC) syndrome is not the correct answer, as it is a coagulation disorder that causes widespread clotting and bleeding in the body. DIC can occur as a complication of severe preeclampsia, but it is not indicated by the laboratory results. DIC would cause a low platelet count, but also a prolonged prothrombin time (PT) and activated partial thromboplastin time (aPTT), and a low fibrinogen level.

Choice B reason: Eclampsia is not the correct answer, as it is a seizure disorder that occurs in clients with severe preeclampsia. Eclampsia can occur as a complication of severe preeclampsia, but it is not indicated by the laboratory results. Eclampsia would cause a high blood pressure, but also a proteinuria, edema, and hyperreflexia.

Choice C reason: Hemolysis, elevated liver enzyme levels, and low platelet levels (HELLP) syndrome is the correct answer, as it is a variant of severe preeclampsia that affects the blood and the liver. HELLP syndrome is indicated by the laboratory results, as it causes a low platelet count, an elevated AST level, and a falling hematocrit. HELLP syndrome would also cause a high blood pressure, a proteinuria, and a right upper quadrant pain.

Choice D reason: Idiopathic thrombocytopenia is not the correct answer, as it is an autoimmune disorder that causes the destruction of platelets by antibodies. Idiopathic thrombocytopenia can affect pregnant women, but it is not related to severe preeclampsia or the laboratory results. Idiopathic thrombocytopenia would cause a low platelet count, but not an elevated AST level or a falling hematocrit.