A 32-year-old G2P1 woman at 39 weeks gestation is in the second stage of active labor. Suddenly, she gasps for air, becomes profoundly cyanotic, and loses consciousness. The fetal monitor shows an acute, prolonged deceleration to 60/min. The patient is apneic and has no palpable carotid pulse. Arrange the following management steps in the most appropriate sequential order for this catastrophic obstetric emergency.
- 1Initiate high-quality chest compressions with continuous manual left uterine displacement.
- 2Establish advanced airway management and administer 100% supplemental oxygen.
- 3Administer intravenous fluid boluses and appropriate vasopressors.
- 4Perform a resuscitative hysterotomy (perimortem cesarean delivery).
Answer
The correct sequence for managing maternal cardiac arrest is: (1) Initiate chest compressions with lateral uterine displacement, (2) Establish an advanced airway with 100% oxygen, (3) Administer ACLS medications and fluids, and (4) Perform a resuscitative hysterotomy if ROSC is not achieved.
This patient's sudden onset of hypoxia, cyanosis, and cardiac arrest during the second stage of labor is classic for an amniotic fluid embolism. Management of maternal cardiac arrest follows a strict algorithm prioritizing maternal circulation and oxygenation. Step 1 is initiating high-quality chest compressions along with continuous manual left uterine displacement; without displacing the gravid uterus, aortocaval compression severely limits venous return, rendering CPR ineffective. Step 2 is securing the airway and delivering 100% oxygen (the C-A-B approach). Step 3 involves ACLS protocols, including intravenous fluids and vasopressors like epinephrine. Step 4 is performing a resuscitative hysterotomy (perimortem cesarean delivery). This is a critical maternal resuscitative measure that must be initiated if return of spontaneous circulation (ROSC) is not achieved within 4 minutes of arrest. Emptying the uterus relieves aortocaval compression, allowing for adequate venous return and improving the efficacy of continued CPR.
Step-by-Step Solution
Key Concept
Management of maternal cardiac arrest (e.g., due to amniotic fluid embolism) requires immediate high-quality CPR with continuous left uterine displacement, followed by airway management, ACLS protocols, and resuscitative hysterotomy if spontaneous circulation does not return within 4 minutes.
Estimated Time:1m 30s