The labor of a pregnant woman with preeclampsia is going to be induced. Before initiating the oxytocin (Pitocin) infusion, the nurse reviews the woman's latest laboratory test findings, which reveal a platelet count of 90,000 mm3, an elevated aspartate aminotransferase (AST) level, and a falling hematocrit. The laboratory results are indicative of which condition?

Choice A reason: Physiological jaundice is not the correct answer, as it is a normal and benign condition that occurs in about 60% of term newborns, and usually appears after the first 24 hours of life. Physiological jaundice is caused by the breakdown of fetal hemoglobin and the immature liver function, and resolves within a few days.

Choice B reason: Maternal cocaine abuse is not the correct answer, as it is a maternal risk factor that can cause various complications in the newborn, such as low birth weight, prematurity, intrauterine growth restriction, or congenital anomalies. Maternal cocaine abuse does not cause jaundice in the newborn, unless it leads to hepatic or renal dysfunction.

Choice C reason: Maternal/newborn blood group incompatibility is the correct answer, as it is a maternal-fetal condition that can cause hemolytic disease of the newborn, which is a severe form of jaundice that can appear within the first 24 hours of life. Maternal/newborn blood group incompatibility occurs when the mother's blood type is Rh negative and the newborn's blood type is Rh positive, or when the mother's blood type is O and the newborn's blood type is A or B. The maternal antibodies cross the placenta and attack the newborn's red blood cells, causing hemolysis, anemia, and hyperbilirubinemia.

Choice D reason: Absence of vitamin K is not the correct answer, as it is a nutritional deficiency that can cause hemorrhagic disease of the newborn, which is a bleeding disorder that can occur within the first week of life. Absence of vitamin K is due to the lack of intestinal flora and the low vitamin K content in breast milk, and can cause bleeding in the skin, mucous membranes, or internal organs. Absence of vitamin K does not cause jaundice in the newborn, unless it leads to hepatic or biliary dysfunction.

Choice A reason: Monitoring the newborn's blood pressure is not the most appropriate action, as it is not directly related to the signs of diaphoresis, jitteriness, and lethargy. These signs are more indicative of hypoglycemia, which is a low blood sugar level that can affect newborns, especially those who are premature, small for gestational age, or have diabetic mothers.

Choice B reason: Initiating phototherapy is not the most appropriate action, as it is used to treat hyperbilirubinemia, which is a high level of bilirubin in the blood that can cause jaundice, a yellowish discoloration of the skin and eyes. Hyperbilirubinemia does not cause diaphoresis, jitteriness, or lethargy.

Choice C reason: Obtaining blood glucose by heel stick is the most appropriate action, as it can confirm the diagnosis of hypoglycemia, which is the most likely cause of the signs of diaphoresis, jitteriness, and lethargy. The nurse should perform a heel stick using a sterile lancet and a glucose meter, and obtain a blood sample from the lateral aspect of the heel. The nurse should also provide warmth, stimulation, and feeding to the newborn, and report the blood glucose level to the provider.

Choice D reason: Placing the newborn in a radiant warmer is not the most appropriate action, as it can cause dehydration, fluid loss, and further hypoglycemia. The nurse should use a radiant warmer only if the newborn is hypothermic, which is a low body temperature that can also affect newborns. The nurse should monitor the newborn's temperature and skin color, and adjust the warmer accordingly.