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Zorluk: ZorObstetric Complications

During a labor induction for preeclampsia with severe features, a patient at 3838 weeks and 22 days gestation begins experiencing acute, severe shortness of breath and a cough producing pink-tinged sputum. The patient, who is 1818 years old and nulliparous, has been receiving continuous intravenous infusions of magnesium sulfate and oxytocin for the past eight hours. Her medical history is otherwise unremarkable, and she has not received regional anesthesia. Vital signs show a temperature of 37.0∘C37.0^\circ\text{C} (98.6∘F98.6^\circ\text{F}), blood pressure of 152/96 mmHg152/96\text{ mmHg}, pulse of 118 /min118\text{ /min}, and respirations of 28 /min28\text{ /min}. Pulse oximetry indicates an oxygen saturation of 88%88\% on room air. Physical examination reveals 3+3+ pitting edema of the lower extremities and bilaterally hyperactive (3+3+) patellar reflexes. Auscultation of the lungs reveals diffuse bilateral crackles extending to the apices. Pelvic examination indicates the cervix is 4 cm4\text{ cm} dilated and 80%80\% effaced. Fetal heart rate monitoring demonstrates a baseline of 140 /min140\text{ /min}, moderate variability, and occasional variable decelerations that recover rapidly to baseline. Which of the following is the most appropriate next step in management?

  1. Intravenous furosemide administrationCevap
  2. B
    Immediate cesarean delivery
  3. C
    Inhaled albuterol therapy
  4. D
    Reassurance and supplemental oxygen
  5. E
    Intravenous ceftriaxone and azithromycin

Cevap

Intravenous furosemide administration
This patient has developed acute pulmonary edema, a life-threatening complication of severe preeclampsia. The pathophysiology involves generalized endothelial damage, decreased plasma oncotic pressure, and elevated hydrostatic pressure, which can be rapidly exacerbated by the administration of intravenous fluids, oxytocin, or magnesium sulfate. The presence of profound hypoxia, diffuse crackles, and pink-tinged sputum confirms fluid overload in the lungs. The definitive acute medical management is diuresis with intravenous furosemide to reduce preload, clear pulmonary congestion, and improve oxygenation. Magnesium toxicity is effectively ruled out by the presence of hyperactive (3+3+) deep tendon reflexes, as toxicity typically causes areflexia prior to respiratory depression.

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1
Analyze the patient's acute respiratory symptoms and physical exam findings.
The patient has severe dyspnea, hypoxia (88%88\% SpO2), pink-tinged sputum, and bilateral crackles.
These findings are the classic presentation of acute alveolar fluid accumulation (pulmonary edema).
2
Contextualize the findings within the patient's current obstetric interventions.
The patient has severe preeclampsia and is receiving intravenous fluids (oxytocin and magnesium infusions). Her deep tendon reflexes are 3+3+.
Preeclampsia increases the risk of pulmonary edema due to endothelial damage, decreased oncotic pressure, and increased afterload. The 3+3+ reflexes rule out magnesium toxicity, which would present with diminished or absent reflexes.
3
Evaluate the fetal status to prioritize management.
The fetal heart rate shows occasional variable decelerations but maintains moderate variability and a normal baseline (Category II).
Because the fetus is not in immediate distress, maternal stabilization is the absolute priority.
4
Determine the definitive next step in management.
Administer an intravenous loop diuretic (furosemide).
Furosemide rapidly decreases intravascular volume and reduces pulmonary congestion, correcting the life-threatening hypoxia.

Anahtar Kavram

Management of preeclampsia-associated acute pulmonary edema
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