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: She is exhibiting hypertonic uterine dysfunction, because she has frequent and painful contractions that are ineffective in dilating the cervix. Hypertonic uterine dysfunction occurs when the uterus contracts too often and too forcefully, resulting in poor oxygenation and fetal distress. The woman may need tocolytic therapy, pain relief, and hydration.

Choice B reason: She is not experiencing a normal latent stage, because her contractions are too frequent and too painful for this phase of labor. The normal latent stage is characterized by irregular and mild contractions that gradually increase in frequency and intensity, and cervical dilation from 0 to 3 cm.

Choice C reason: She is not experiencing precipitous labor, because her labor is not progressing rapidly. Precipitous labor is defined as labor that lasts less than 3 hours from the onset of contractions to the delivery of the baby. It is associated with cervical dilation of more than 5 cm per hour.

Choice D reason: She is not exhibiting hypotonic uterine dysfunction, because her contractions are not weak or infrequent. Hypotonic uterine dysfunction occurs when the uterus contracts too weakly or too rarely, resulting in prolonged labor and increased risk of infection. The woman may need oxytocin augmentation, amniotomy, or cesarean section.

Choice A reason: Increased risk of anemia is not a likely cause of respiratory distress in a term macrosomic newborn, as it can affect any newborn regardless of the maternal diabetes status or the fetal size. Anemia can cause pallor, tachycardia, and poor feeding, but not respiratory distress.

Choice B reason: Hyperinsulinemia is a likely cause of respiratory distress in a term macrosomic newborn, as it results from the fetal exposure to high maternal glucose levels and the subsequent overproduction of insulin. Hyperinsulinemia can impair the synthesis of surfactant, which is a substance that prevents the alveoli from collapsing and facilitates gas exchange. Hyperinsulinemia can also cause hypoglycemia, which can affect the respiratory center and cause apnea.

Choice C reason: Increased blood viscosity is not a likely cause of respiratory distress in a term macrosomic newborn, as it can affect any newborn with polycythemia, which is an abnormally high number of red blood cells. Polycythemia can cause cyanosis, jaundice, and thrombosis, but not respiratory distress.

Choice D reason: Brachial plexus injury is not a likely cause of respiratory distress in a term macrosomic newborn, as it affects the nerves that supply the arm and hand, not the lungs. Brachial plexus injury can occur due to the excessive traction or stretching of the shoulder during delivery, and can cause weakness, paralysis, or sensory loss in the affected arm.