A nurse is caring for a newborn who is large for gestational age and is 12 hours old.
Which of the following laboratory tests should the nurse monitor based on the client's condition?

The nurse should first address the fetal heart rate followed by the client's vaginal discharge.

WBC count rationale: A WBC count of 22,000/mm³ is significantly elevated above the normal range of 5,000 to 10,000/mm³, suggesting maternal infection such as chorioamnionitis. While this is clinically important, it is not the immediate first priority in acute obstetric care. Maternal infection must be managed, but fetal well-being is prioritized first because hypoxia or distress can occur rapidly and requires immediate recognition and intervention before laboratory abnormalities are addressed.

Maternal Blood Type rationale: The maternal blood type of O negative is clinically relevant for Rh incompatibility and the need for Rho(D) immune globulin administration. However, this is not an acute priority in the setting of preterm labor with rupture of membranes. Blood type considerations are important for long-term management but do not supersede the need to assess fetal well-being or evaluate vaginal discharge for evidence of amniotic fluid leakage or bleeding.

Fetal heart rate rationale: Fetal heart rate monitoring is the highest priority because it provides real-time information about fetal oxygenation and well-being. The normal baseline range is 110 to 160 beats per minute, and this client’s rate of 148/min is within normal limits. However, continuous monitoring is essential due to preterm labor, rupture of membranes, and maternal fever, all of which increase the risk of fetal distress. Therefore, fetal heart rate assessment is addressed first to ensure immediate recognition of hypoxia or compromise.

Respiratory rate rationale: The maternal respiratory rate of 18/min is within the normal adult range of 12 to 20/min. This finding does not indicate acute compromise and does not require urgent intervention. While maternal respiratory status is always monitored, it is not prioritized above fetal assessment or evaluation of vaginal discharge in this scenario. Thus, respiratory rate is stable and requires only routine monitoring, not immediate follow-up in the prioritization of care.

Blood pressure rationale: The maternal blood pressure of 112/59 mm Hg is within acceptable limits for pregnancy, as mild decreases in systemic vascular resistance are physiologic. Hypotension would be concerning if systolic <90 mm Hg or diastolic <50 mm Hg, but this value does not indicate shock or preeclampsia. Therefore, blood pressure is not prioritized over fetal monitoring or vaginal discharge assessment in this case. It remains stable and requires routine monitoring only.

Vaginal discharge rationale: Vaginal discharge is the next priority after fetal heart rate because the client has clear fluid with nitrazine positive, confirming premature rupture of membranes, along with mucous discharge and bleeding. These findings raise concern for infection, preterm labor progression, and placental complications. Evaluating vaginal discharge helps determine the presence of amniotic fluid, blood, or purulent material, guiding urgent interventions. Therefore, it is addressed immediately after fetal heart rate monitoring to prevent maternal and fetal complications.

Choice A rationale

Subconjunctival hemorrhage is a common, generally benign finding in newborns, often resulting from increased intraocular pressure during the birthing process, causing rupture of superficial capillaries in the sclera. It presents as a bright red patch under the conjunctiva and usually resolves spontaneously within a few weeks without intervention, thus it does not warrant immediate, priority assessment.

Choice B rationale

Rust-stained urine, or pink-tinged urine, in a newborn is typically due to the presence of uric acid crystals (urates) in the urine, a normal finding related to concentrated urine and the immaturity of the newborn kidney's ability to concentrate urine fully. This is a common, non-pathological observation in the first few days of life, indicating mild dehydration, but it is not an acute, high-priority concern.

Choice C rationale

Nasal flaring is a significant sign of respiratory distress in a newborn, indicating the infant is attempting to increase the diameter of the nasal passages to decrease airway resistance and enhance the intake of oxygen. This compensatory mechanism suggests compromised gas exchange and potential hypoxemia, requiring immediate assessment and intervention to prevent further respiratory compromise.

Choice D rationale

Overlapping suture lines, also known as molding, occurs when the cranial bones shift and overlap during passage through the narrow birth canal. This is a normal, expected finding, especially after a vaginal delivery, and the shape of the head typically returns to normal within a few days to a week, posing no immediate threat to the newborn.