A 25-year-old primigravida at 40 weeks gestation is undergoi… | 마이메르시 MyMerci
Maternal Newborn Health
문제

A 25-year-old primigravida at 40 weeks gestation is undergoing labor induction with oxytocin. Suddenly, she develops severe dyspnea, cyanosis, and hypotension. The fetal heart rate shows severe bradycardia. The nurse suspects anaphylactoid syndrome of pregnancy (ASP). What is the priority nursing intervention?

Emergency management of suspected anaphylactoid syndrome of pregnancy during labor
해설
Immediate CPR and emergency cesarean delivery are prioritized to stabilize the mother and rescue the fetus. Other interventions are supportive but secondary in this life-threatening scenario.

심화 해설

Core Nursing Explanation Key Concept Analysis: This question tests the priority nursing intervention for a suspected Anaphylactoid Syndrome of Pregnancy (ASP), also known as Amniotic Fluid Embolism (AFE). ASP is a rare, catastrophic, and often fatal obstetric emergency characterized by the sudden entry of amniotic fluid into the maternal circulation, triggering a severe anaphylactoid (allergic-like) reaction and coagulopathy (DIC). The classic triad is acute hypotension, hypoxia, and coagulopathy (DIC), often preceded by a sense of "impending doom."

Answer Rationale: Key Point! The priority in ASP is immediate resuscitation of the mother and expedited delivery of the fetus. The scenario describes severe dyspnea, cyanosis, hypotension, and fetal bradycardia, indicating both maternal cardiovascular collapse and fetal compromise. The only intervention that addresses both life-threatening issues simultaneously is preparing for immediate cardiopulmonary resuscitation (CPR) and emergency cesarean delivery. CPR supports the mother's circulation and oxygenation, while emergency delivery relieves aortocaval compression, may improve maternal hemodynamics, and is the only chance for fetal survival.

Distractor Analysis:
  • Watch out for confusion! Option ①: Increasing the oxytocin infusion rate is contraindicated. Oxytocin can worsen uterine tone and theoretically force more amniotic fluid into the circulation. The infusion should be stopped immediately.
  • Option ②: Positioning in Trendelenburg (head down) is generally not recommended for hypotensive patients in shock as it can impair respiratory excursion and does not significantly improve cardiac output. The preferred position for a pregnant patient in shock is left lateral tilt to displace the uterus off the great vessels.
  • Option ④: Administering high-flow oxygen is a critical supportive measure for hypoxia, but it is not the priority action when both mother and fetus are in immediate, severe distress. Oxygen administration would occur concurrently during resuscitation efforts, but definitive treatment (delivery and advanced life support) takes precedence.
Related Concepts: ASP management is a multi-disciplinary, all-hands emergency. Nursing priorities follow the ABC (Airway, Breathing, Circulation) framework with the added imperative of delivering the fetus. Management includes securing the airway (often intubation), providing 100% oxygen, supporting circulation with IV fluids and vasopressors, correcting coagulopathy with blood products, and proceeding to perimortem cesarean delivery if maternal cardiac arrest occurs.

Concept Summary
ComponentDetails
ConditionAnaphylactoid Syndrome of Pregnancy (ASP) / Amniotic Fluid Embolism (AFE)
PathophysiologyAmniotic fluid enters maternal circulation → anaphylactoid reaction + DIC → cardiopulmonary collapse.
Classic TriadHypotension, Hypoxia, Coagulopathy (DIC). Often: seizure, feeling of doom.
Fetal SignSevere, prolonged bradycardia (fetal distress).
Nursing PrioritySimultaneous maternal resuscitation (CPR) & preparation for emergency delivery.
Key InterventionStop oxytocin, call for help (code/rapid response), left lateral tilt, 100% O2, IV access, prepare for surgery & blood products.

Side-by-Side Comparison!
Obstetric EmergencyKey FeaturesPriority Nursing Action
Anaphylactoid Syndrome of Pregnancy (ASP)Sudden dyspnea, cyanosis, hypotension, DIC, fetal bradycardia.Activate emergency team, CPR if needed, prepare for emergency cesarean delivery.
Uterine RuptureSudden sharp abdominal pain, loss of uterine contour, recession of presenting part, maternal tachycardia & hypotension, fetal bradycardia.Stop oxytocin/pitocin, prepare for emergency laparotomy & cesarean delivery.
Placental AbruptionSudden dark vaginal bleeding, painful, rigid ("board-like") uterus, maternal shock out of proportion to visible blood loss, fetal distress.Assess for DIC, monitor bleeding, prepare for emergency delivery (often cesarean).
EclampsiaSeizure in a patient with preeclampsia (hypertension, proteinuria).Protect airway, prevent injury, administer Magnesium Sulfate IV as ordered, prepare for delivery.

Anatomy, Physiology & Pharmacology Points
  • Patho-mechanism: The breach in the physical barrier between amniotic fluid and maternal venous system (e.g., during labor, cesarean, uterine trauma) allows fetal squamous cells, lanugo, meconium, and other debris to enter. This triggers a massive systemic inflammatory response similar to anaphylaxis, leading to pulmonary vasospasm, right heart failure, left heart failure, and acute respiratory distress syndrome (ARDS). It also activates the coagulation cascade, consuming clotting factors and leading to Disseminated Intravascular Coagulation (DIC).
  • Oxytocin Role: Oxytocin stimulates uterine contractions. In the context of ASP, strong contractions may increase intra-amniotic pressure, potentially facilitating the entry of fluid into venous sinuses. Therefore, it must be stopped immediately.

Memory Tips
  • Acronym for ASP Triad: "Hypotension, Hypoxia, Hemorrhage (from DIC)" – The 3 H's of Hell (a severe emergency).
  • Priority Action: Think "Two Lives, One Priority": Save the mom with CPR, save the baby with immediate delivery. They are inseparable actions in this crisis.
  • What to STOP: Remember "Stop the Oxytocin, Start the Oxygen, Summon help for Surgery."

High-Frequency NCLEX Topics ASP is a classic NCLEX "priority" and "emergency management" question. The exam tests your ability to:
  1. Recognize the signs of this rare but critical complication.
  2. Differentiate it from other causes of maternal distress (e.g., pulmonary embolism, eclampsia).
  3. Select the immediate, highest-priority action from a list of plausible but lower-priority interventions.
  4. Understand that when both mother and fetus are in extremis, delivery is part of maternal resuscitation.

Watch Out for Question Variations!
  • Symptom Identification: "A laboring patient suddenly screams 'I can't breathe!' and becomes cyanotic. The nurse should first suspect..." (Answer: Amniotic Fluid Embolism/ASP).
  • Post-Delivery Complication: The scenario might occur immediately after delivery or during a cesarean section, not just during induction.
  • Focus on Coagulopathy: "Following initial stabilization of a patient with ASP, which laboratory finding would the nurse anticipate?" (Answer: Elevated D-dimer, prolonged PT/PTT, low fibrinogen – signs of DIC).
  • Medication Contraindication: "Which action by the nurse is contraindicated for a patient with suspected ASP?" (Answer: Continuing or increasing the oxytocin infusion).

임상 시나리오

Nursing Clinical Practice Guide Clinical Scenario: You are the labor nurse for Maria, a 25-year-old G1P0 at 40 weeks. Oxytocin (Pitocin) infusion is running at 12 mU/min for induction. At 6 cm dilation, she suddenly sits up, clutches her chest, and gasps, "I can't breathe!" You note her lips are blue, her blood pressure drops to 70/40, and the fetal heart rate monitor shows a deep, persistent bradycardia at 60 bpm.

Nursing Intervention Strategy:
  1. Immediate Action (First 30 seconds):
    • Call for Help: Activate the hospital's obstetric emergency code (e.g., "Code White" or "Rapid Response Team") and shout for the charge nurse, obstetrician, anesthesiologist, and neonatal team.
    • Stop the Insult: Immediately stop the oxytocin infusion.
    • Position: Manually displace the uterus to the left (left lateral tilt) to improve venous return. Do not use Trendelenburg.
    • Oxygen: Apply a non-rebreather mask at 15 L/min to provide 100% oxygen. Be prepared for the anesthesiologist to intubate.
  2. Simultaneous Actions (Next 1-2 minutes):
    • Assess & Support ABCs: Check responsiveness, pulse, breathing. If no pulse, initiate CPR with emphasis on high-quality chest compressions. The code team will take over.
    • IV Access: Ensure you have at least two large-bore (16- or 18-gauge) IV lines. Begin a rapid infusion of isotonic crystalloid (e.g., Normal Saline or Lactated Ringer's) as ordered to support blood pressure.
    • Monitor: Continuously monitor maternal ECG, SpO2, and fetal heart rate.
    • Prepare for Surgery: Verbally confirm with the team: "Preparing for emergency cesarean delivery." The scrub nurse will prepare the instrument tray while you help transfer the patient to the OR table.
  3. Ongoing Management:
    • Laboratory: Anticipate orders for STAT labs: CBC, coagulation panel (PT/PTT, fibrinogen, D-dimer), ABG (Arterial Blood Gas).
    • Blood Products: Prepare for massive transfusion protocol: Have O-negative or type-specific blood, fresh frozen plasma (FFP), cryoprecipitate, and platelets ready.
    • Documentation: Accurately document the time of onset, sequence of symptoms, all interventions, and team responses.
Patient Safety and Precautions:
  • Never Leave the Patient Alone during this crisis.
  • Communication is Key: Use clear, closed-loop communication (e.g., "Dr. Smith, I have stopped the Pitocin." "Stopped Pitocin, confirmed.").
  • Family Support: Assign a staff member to communicate with the support person/family, providing clear, calm updates away from the chaotic scene.

Nursing Procedure & Medication Flow Emergency Cesarean Delivery Preparation:
  1. Quickly remove all jewelry, belly rings, and nail polish from the patient.
  2. Insert an indwelling urinary catheter (Foley catheter) if not already in place.
  3. Perform a rapid abdominal prep with antiseptic solution.
  4. Ensure the neonatal resuscitation team and warmer are present in the OR.
Medication Alert:
  • Oxytocin (Pitocin): CONTRAINDICATED in suspected ASP. Discontinue immediately.
  • Vasopressors (e.g., Epinephrine, Norepinephrine): May be administered by the anesthesiologist via central line to support blood pressure.
  • Blood Products: Administer via a blood warmer and rapid infusion device under pressure as ordered to correct hypovolemia and coagulopathy.

A Word from Your Senior Nurse "Anaphylactoid Syndrome is the storm that every labor nurse fears but must be prepared for. It's fast, it's furious, and it tests every ounce of your training. In this moment, you are the first responder. Your ability to stay calm, think clearly, and execute the ABCs while mobilizing the entire team is what will give this mom and baby a fighting chance. Remember, in obstetric emergencies, you're managing two patients in one body. Sometimes, saving the baby is the fastest way to save the mom. Never hesitate to call for help—this is not a 'wait-and-see' situation. Your swift recognition and action can literally mean the difference between life and death. Study these protocols until they're muscle memory."

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