A nurse is caring for a female client who is at 12 weeks of gestation in the prenatal clinic.

Exhibits

A nurse in a prenatal clinic is reviewing the laboratory results for a client who is at 12 weeks of gestation. Which of the following actions should the nurse take?

Choice A rationale

A speculum exam to test for fetal fibronectin is primarily used to predict the risk of preterm labor in symptomatic women between 22 and 34 weeks of gestation. Since the client is at 37 weeks of gestation (term) and the concern is a slow trickle of fluid suggesting rupture of membranes (ROM), this test is not appropriate for the current clinical presentation or gestational age.

Choice B rationale

Nitrazine testing is a rapid, non-invasive method used to determine if the fluid leaking from the vagina is amniotic fluid. Amniotic fluid is alkaline (pH of 7.0 to 7.5) and will turn the yellow-to-orange nitrazine paper to a characteristic deep blue color, which helps confirm the diagnosis of premature rupture of membranes (PROM), a likely cause of the reported fluid trickle.

Choice C rationale

A urinalysis determines components like protein, glucose, and ketones, and is mainly used to screen for conditions such as preeclampsia (indicated by proteinuria) or urinary tract infection (UTI). While part of routine prenatal care, it is not the diagnostic test for confirming ruptured membranes, which is the primary concern given the client's report of a slow trickle of vaginal fluid.

Choice D rationale

Amniocentesis is an invasive procedure used to aspirate amniotic fluid, typically to assess fetal lung maturity (L/S ratio) or for genetic testing. Since the client is at 37 weeks and the suspicion is ruptured membranes, which warrants immediate action due to infection risk, the risks and benefits of an amniocentesis for lung maturity are not justified.

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.