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Zorluk: OrtaObstetric Complications

A pregnant individual in her fourth pregnancy (gravida 4, para 1) is evaluated in the labor suite at 40 weeks and 1 day of gestation. She is currently undergoing a trial of labor after a previous cesarean delivery. Her obstetric history is notable for a primary low transverse surgical delivery three years ago due to a breech presentation. Her prenatal course for the current pregnancy has been uncomplicated. Over the last four hours, her labor has progressed steadily. Her most recent cervical examination revealed 88 cm of dilation and a fetal station of +1+1. Her contractions have been strong, occurring every 2 to 3 minutes.

Shortly after the examination, the patient suddenly screams in agony, reporting an intense, tearing pain in her lower abdomen that does not resolve between contractions. Concurrently, the intrauterine pressure monitor shows an abrupt cessation of regular uterine contractions, and the continuous fetal heart rate tracing reveals a precipitous drop to a baseline of 75/min for the last four minutes. A rapid bedside physical examination shows moderate vaginal bleeding, and the fetal presenting part is now palpable at the −2-2 station.

Which of the following is the most appropriate next step in the management of this patient?

  1. Urgent laparotomy and surgical deliveryCevap
  2. B
    Initiation of an intravenous oxytocin infusion
  3. C
    Placement of a fetal scalp electrode
  4. D
    Administration of a transcervical amnioinfusion
  5. E
    Reassurance and administration of an epidural bolus

Cevap

Urgent laparotomy and surgical delivery
The correct action is to perform an immediate laparotomy and surgical delivery. This patient's presentation—sudden tearing abdominal pain, cessation of uterine contractions, loss of fetal station (regression from a +1+1 to a −2-2 station), and prolonged fetal bradycardia—is the classic presentation of uterine rupture. Patients undergoing a trial of labor after cesarean (TOLAC) are at increased risk for this catastrophic event. When the myometrium ruptures, the fetus can partially or completely extrude into the maternal abdominal cavity. This results in an immediate loss of station on pelvic examination and sudden fetal distress due to the disruption of the uteroplacental interface. The definitive and only appropriate management is an emergency surgical delivery to prevent maternal exsanguination and fetal demise.

Adım Adım Çözüm

1
Analyze the patient's risk factors.
The patient is undergoing a trial of labor after a previous cesarean delivery, placing her at an increased risk for uterine rupture.
Prior uterine scars are the most significant risk factor for myometrial disruption during active labor.
2
Evaluate the acute clinical changes.
The patient developed sudden tearing abdominal pain, an abrupt cessation of regular contractions, and vaginal bleeding.
These signs suggest a sudden structural failure of the uterus, disrupting normal contractility and causing internal/external hemorrhage.
3
Interpret the fetal and pelvic exam findings.
The fetus exhibits severe bradycardia (75/min), and the presenting part has regressed from a +1+1 station to a −2-2 station.
Loss of fetal station occurs because the fetus is extruding through the uterine defect into the maternal abdomen, immediately compromising uteroplacental perfusion and causing severe fetal distress.
4
Determine the next best step in management.
The clinical picture is diagnostic of uterine rupture, requiring immediate operative intervention.
Emergency laparotomy and surgical delivery are necessary to deliver the fetus, control maternal hemorrhage, and repair or remove the ruptured uterus.

Anahtar Kavram

Uterine rupture is an obstetric emergency characterized by sudden, severe abdominal pain, loss of fetal station, cessation of uterine contractions, and abnormal fetal heart rate (often bradycardia). Immediate laparotomy and cesarean delivery are required.
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Konular

Obstetric Complications

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