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Zorluk: Çok zorObstetric Complications

A 34-year-old woman, gravida 2, para 1, at 38 weeks gestation is admitted to the labor and delivery unit for induction of labor due to preeclampsia with severe features. Her medical history is notable for mild persistent asthma, for which she uses an inhaled corticosteroid. She is receiving intravenous magnesium sulfate for seizure prophylaxis and an intravenous oxytocin infusion for labor augmentation. Maintenance intravenous fluids are running at 125 mL/hr. Fourteen hours into her induction, she becomes acutely agitated and reports sudden-onset severe shortness of breath and chest tightness. She states she is unable to lie flat.

Vital signs are:
Temperature: 37.0°C (98.6°F)
Blood pressure: 172/112 mmHg
Heart rate: 118/min
Respiratory rate: 28/min
SpO2: 86% on room air

Physical examination reveals prominent jugular venous pulsations. Lung auscultation reveals scattered wheezes and bilateral fine crackles extending to the mid-lung fields. The fetal heart rate tracing demonstrates a baseline of 140/min, moderate variability, and symmetric, gradual decreases in the heart rate that nadir exactly at the peak of uterine contractions.

An arterial blood gas on room air shows:
pH: 7.44
PaCO2: 28 mmHg
PaO2: 58 mmHg
HCO3: 19 mEq/L

The patient is immediately placed on supplemental oxygen via a non-rebreather mask. Which of the following is the most appropriate next step in the management of this patient?

  1. Intravenous furosemideCevap
  2. B
    Albuterol sulfate nebulization
  3. C
    Emergency Cesarean delivery
  4. D
    Intravenous sodium bicarbonate
  5. E
    Reassurance and continued observation

Cevap

Intravenous furosemide
The clinical presentation of acute-onset dyspnea, severe hypoxia, orthopnea, jugular venous distention, and basilar crackles in a patient with severe preeclampsia strongly indicates acute pulmonary edema. Preeclampsia significantly increases the risk of pulmonary edema due to generalized endothelial damage (increasing capillary permeability), severe vasospasm (increasing afterload), and decreased plasma colloid osmotic pressure. The aggressive administration of intravenous fluids and the antidiuretic effect of oxytocin further exacerbate this fluid overload. The definitive initial management for acute pulmonary edema is aggressive preload reduction using intravenous loop diuretics, such as furosemide, along with supplemental oxygen. While delivery is the ultimate cure for preeclampsia, maternal stabilization with diuresis must occur first, particularly when the fetal status is reassuring.

Adım Adım Çözüm

1
Analyze the maternal clinical presentation and vital signs.
The patient exhibits acute dyspnea, orthopnea, severe hypoxia (SpO2 86%), jugular venous distention, and crackles.
These findings in a patient receiving intravenous fluids for preeclampsia strongly indicate fluid overload and acute pulmonary edema, ruling out simple asthma.
2
Interpret the arterial blood gas (ABG) values.
pH 7.44, PaCO2 28 mmHg, and HCO3 19 mEq/L represent the normal compensated respiratory alkalosis of pregnancy. However, the PaO2 of 58 mmHg confirms severe hypoxemia.
Accurate ABG interpretation prevents the misdiagnosis of metabolic acidosis while confirming the severity of the respiratory failure.
3
Evaluate the fetal heart rate (FHR) tracing.
The FHR shows a normal baseline, moderate variability, and early decelerations (nadir matching contraction peak).
Early decelerations are a benign result of fetal head compression and do not indicate fetal hypoxia or the need for emergent delivery.
4
Determine the most appropriate immediate intervention.
Administer intravenous furosemide.
Maternal stabilization is the top priority. Furosemide provides rapid preload reduction to treat the acute pulmonary edema.

Anahtar Kavram

Acute pulmonary edema is a life-threatening complication of severe preeclampsia caused by increased afterload, capillary leak, and fluid overload; initial management prioritizes maternal stabilization with oxygen and preload reduction using intravenous loop diuretics.
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Obstetric Complications

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