A nurse is assessing a client who has heart failure. The client has moist lung sounds, bounding pulse, increased blood pressure, and pitting peripheral edema. Which of the following is the nurse's priority intervention?

Rationale:

A. Collect 4 mL/kg of blood in a 24-hr period: This volume exceeds safe limits for blood collection in small children. The guideline is not to exceed 3 mL/kg over 24 hours unless clinically necessary, as excessive draws can lead to anemia or hemodynamic instability.

B. Apply lidocaine cream 30 min prior to collecting the specimen: While lidocaine-prilocaine cream can be helpful, it typically requires at least 60 minutes to achieve adequate dermal analgesia. Applying it for only 30 minutes may not be sufficient to reduce pain effectively.

C. Ask the parents to leave the room prior to collecting the blood specimen: Parents are often a source of comfort and reassurance for preschoolers. Unless their presence is disruptive, involving them in the process can help calm the child and improve cooperation.

D. Demonstrate the use of the equipment to the child: Preschoolers benefit from age-appropriate explanations and demonstrations. Showing them the equipment reduces fear and anxiety by promoting familiarity and a sense of control in an unfamiliar situation.

Rationale for Correct Choices:

• Evaluating the fetal heart rate tracing: The client’s report of decreased fetal movement and severe hypertension raises concern for fetal compromise. Immediate fetal assessment ensures the fetus is tolerating the intrauterine environment, especially before administering medications like magnesium sulfate.
• Administering magnesium sulfate IV: This is prescribed to prevent eclampsia, given the client’s severely elevated BP, hyperreflexia, and proteinuria. After confirming fetal status, seizure prophylaxis should be initiated without delay.

Rationale for Incorrect Choices:

• Administering acetaminophen PO: Although ordered for headache, the symptom is a manifestation of severe preeclampsia. Treating it symptomatically without addressing its cause could delay necessary critical interventions.
• Obtaining a 24-hour urine collection: Useful for confirming the extent of proteinuria, but not immediately necessary for clinical decision-making given existing positive findings.
• Inserting an indwelling urinary catheter: This supports fluid monitoring during magnesium therapy, but fetal assessment and seizure prevention take precedence.
• Administering betamethasone IM: Important for fetal lung development in preterm pregnancies, but it is not the immediate priority when there is a high risk for seizure or fetal distress.