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Soru

Zorluk: OrtaLabor, Delivery, and Puerperium

A pregnant patient, gravida 3, para 2, at 39 weeks gestation is admitted to the labor unit following the spontaneous onset of contractions. Her prenatal course has been entirely uncomplicated. Cervical examination upon admission reveals 5 cm dilation and 90% effacement. The patient requests pain management, and a continuous lumbar epidural is successfully placed. Twenty minutes later, the patient reports feeling sudden onset lightheadedness and nausea. Her blood pressure is now 82/45 mmHg, representing a significant drop from her admission baseline of 118/76 mmHg. Simultaneously, the external fetal heart rate monitor demonstrates a baseline of 125/min with minimal variability and recurrent late decelerations. The nursing staff immediately places the patient in the left lateral decubitus position and initiates a rapid intravenous infusion of lactated Ringer solution. After five minutes of these interventions, her blood pressure remains 84/48 mmHg and the fetal decelerations persist. Which of the following is the most appropriate next step in the management of this patient?

  1. Intravenous administration of ephedrineCevap
  2. B
    Emergency cesarean delivery
  3. C
    Subcutaneous administration of terbutaline
  4. D
    Initiation of a transcervical amnioinfusion
  5. E
    Immediate removal of the epidural catheter

Cevap

The most appropriate next step is the intravenous administration of a vasopressor such as ephedrine.
This patient is experiencing severe maternal hypotension as a known complication of epidural analgesia, which causes sympathetic blockade and systemic vasodilation. The resulting drop in maternal blood pressure reduces uteroplacental perfusion, leading to fetal hypoxia and the recurrent late decelerations seen on the monitor. Because the initial conservative measures (left lateral positioning to relieve inferior vena cava compression and an intravenous fluid bolus to increase preload) have failed to correct the blood pressure, administration of an intravenous vasopressor such as ephedrine or phenylephrine is required. This will actively vasoconstrict the peripheral vasculature, restore maternal hemodynamics, and improve fetal oxygenation.

Adım Adım Çözüm

1
Identify the underlying cause of the fetal distress.
The fetal tracing shows late decelerations immediately following epidural placement, alongside a precipitous drop in maternal blood pressure. This indicates uteroplacental insufficiency secondary to maternal hypotension.
Epidural analgesia frequently causes sympathetic nerve blockade, leading to peripheral vasodilation, venous pooling, and subsequent hypotension.
2
Evaluate the response to initial intrauterine resuscitation.
The patient was correctly placed in the left lateral decubitus position (to relieve aortocaval compression) and given an IV fluid bolus, but these first-line conservative measures failed to restore her blood pressure.
When mechanical and volume-expanding interventions fail to correct epidural-induced hypotension, pharmacological intervention is required.
3
Select the appropriate pharmacological therapy.
Intravenous ephedrine or phenylephrine must be administered.
Vasopressors directly counteract the medication-induced vasodilation, restoring maternal blood pressure, improving uteroplacental perfusion, and thereby resolving the late decelerations.

Anahtar Kavram

Management of epidural-induced maternal hypotension and subsequent fetal late decelerations involves left lateral positioning and IV fluid bolus, followed by IV vasopressors (e.g., ephedrine or phenylephrine) if conservative measures fail.
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Labor, Delivery, and Puerperium

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