A 35-year-old woman at 36 weeks gestation presents to the em… | 마이메르시 MyMerci
Maternal Newborn Health
문제

A 35-year-old woman at 36 weeks gestation presents to the emergency department with sudden onset of severe abdominal pain and vaginal bleeding. Her vital signs are: BP 100/70 mmHg, HR 110 bpm, RR 22/min, and fetal heart rate shows variable decelerations. The nurse suspects placental abruption. What is the priority nursing intervention?

해설
Establishing large-bore IV access and preparing for emergency cesarean delivery is the priority to manage maternal hemodynamic instability and fetal compromise in suspected placental abruption. Other interventions are contraindicated or less urgent.

심화 해설

Core Nursing Explanation Key Concept Analysis: This question tests the priority nursing intervention for a suspected Placental abruption (Abruptio placentae). Abruption is the premature separation of the placenta from the uterine wall before delivery. It is a Key Point! true obstetric emergency due to the risk of maternal hemorrhage, Disseminated intravascular coagulation (DIC), and fetal hypoxia or death. The pathophysiology involves bleeding into the decidua basalis, leading to concealed or revealed hemorrhage, uterine hypertonicity, and compromised fetal-placental circulation.

Answer Rationale: The priority is Establishing large-bore IV access and preparing for emergency cesarean delivery. The patient's presentation (severe pain, bleeding, tachycardia, hypotension) indicates maternal hemodynamic instability. Variable decelerations in the fetal heart rate (FHR) signify Umbilical cord compression, a sign of fetal distress. The primary goals are to restore maternal circulating volume and expedite delivery to save both mother and fetus. Large-bore IVs (e.g., two 18-gauge) are essential for rapid fluid resuscitation and blood transfusion. Emergency cesarean delivery is often the definitive treatment for a severe abruption with fetal compromise.

Distractor Analysis: Watch out for confusion!
Perform a vaginal examination: This is contraindicated in suspected placenta previa (painless bleeding) and should be avoided in abruption until previa is ruled out by ultrasound. A vaginal exam could disrupt a low-lying placenta or provoke further hemorrhage.
Administer terbutaline: Terbutaline is a tocolytic used to stop preterm labor. In abruption, uterine contractions are a symptom, not the primary problem. Relaxing the uterus with tocolytics could mask the severity of bleeding and is contraindicated as it does not treat the underlying hemorrhage.
Position in Trendelenburg: The Trendelenburg position (head down) is generally not recommended for hypotensive patients as it can impair respiratory function and does not significantly improve cardiac output. For a pregnant patient, the preferred position is Left lateral recumbent to relieve aortocaval compression and improve placental blood flow.

Related Concepts: The nurse must understand the critical differences between Placental abruption and Placenta previa. Both cause third-trimester bleeding, but their management differs significantly. The nurse's role involves rapid assessment (vital signs, fetal monitoring, pain assessment), initiating emergency protocols, providing emotional support, and preparing for possible complications like DIC. Concept Summary
ConceptKey Points
Placental AbruptionPremature separation. Presents with painful dark red bleeding, uterine tenderness/rigidity, fetal distress. Risk of maternal hemorrhage/DIC.
Priority InterventionABCs. Large-bore IV access (x2), fluid/blood resuscitation, continuous FHR monitoring, prepare for emergency delivery.
Contraindicated ActionsVaginal exams (until previa ruled out), tocolytics, delaying definitive treatment.
Fetal Monitoring FindingLate decelerations (placental insufficiency) or variable decelerations (cord compression from blood).
Side-by-Side Comparison!
FeaturePlacental AbruptionPlacenta Previa
PainSudden, severe abdominal painUsually painless bleeding
BleedingDark red, may be concealedBright red, painless
UterusTender, firm, "woody" hard, hypertonicSoft, non-tender
Fetal PresentationMay not be affected initiallyOften malpresentation (breech, transverse)
Priority Nursing ActionIV access, prepare for emergency C-sectionNo vaginal exams, monitor, prepare for C-section
Anatomy, Physiology & Pharmacology PointsPathophysiology: Bleeding at the decidua basalis forms a hematoma, causing further separation. This compromises gas/nutrient exchange, leading to fetal hypoxia. • Maternal Risk: Concealed hemorrhage can lead to Couvelaire uterus (blood infiltrates uterine muscle), impairing contraction post-delivery and increasing hemorrhage risk. • Fetal Risk: The loss of placental surface area causes fetal hypoxia, acidosis, and bradycardia. • Drug Implication: Oxytocin (Pitocin) may be given after delivery to promote uterine contraction and control bleeding. Magnesium sulfate may be used for neuroprotection if preterm delivery is imminent, not for tocolysis. Memory TipsAbruption = PAIN: Painful, Acute, Instability (maternal/fetal), Need delivery NOW. • Previa = NO PAIN: No pain, Openly bright red bleeding. Painless, Avoid exams, Imaging (ultrasound) needed, No labor allowed. • Think "IVs and OR" for abruption priority. High-Frequency NCLEX Topics Placental abruption is a classic NCLEX emergency scenario. The exam tests your ability to: 1. Differentiate abruption from previa based on symptoms. 2. Identify priority actions (always stabilize the mother first—ABCs, IV access). 3. Recognize contraindicated interventions (vaginal exam in this context). 4. Understand that fetal distress + maternal instability = immediate delivery. Watch Out for Question Variations! • Instead of asking for the intervention, it may ask: "What finding would the nurse expect?" (Answer: painful, dark red bleeding, rigid uterus). • It may combine with DIC: "Which lab value indicates a complication of abruption?" (Answer: decreased platelets, increased PT/PTT, decreased fibrinogen). • It may test positioning: "What is the best position for this patient?" (Answer: Left lateral recumbent).

임상 시나리오

Nursing Clinical Practice Guide Clinical Scenario: You are the triage nurse in L&D (Labor and Delivery). A patient arrives as described. She is pale, diaphoretic, clutching her abdomen, and terrified. Her partner is equally distressed.

Nursing Intervention Strategy: 1. Immediate Assessment & Communication: While guiding her to a room, perform a rapid visual assessment (bleeding, pallor, distress). Alert the charge nurse and OB provider immediately using a clear, concise SBAR (Situation, Background, Assessment, Recommendation) report. 2. Simultaneous Actions: • Another nurse applies continuous FHR and contraction monitoring. • You establish two large-bore IV lines with normal saline running wide open. Draw labs: CBC, coagulation panel (PT/PTT, fibrinogen), type and crossmatch for 4 units of blood. • Position patient in left lateral tilt (or place a wedge under her right hip). • Administer oxygen via non-rebreather mask at 10-15 L/min. • Assess vital signs every 5-15 minutes. 3. Ongoing Care: Quantify bleeding (pad count/weight). Monitor for signs of shock (increasing HR, decreasing BP, oliguria) and DIC (oozing from IV sites, petechiae). Provide clear, calm explanations to the patient and family. The team will prepare for STAT cesarean delivery.

Patient Safety and Precautions: • Never leave the patient alone. • Do not perform a vaginal or rectal exam until a bedside ultrasound confirms the placental location. • Monitor for uterine tetany (a single, prolonged contraction) on the toco monitor—a classic sign of abruption. • Be prepared for postpartum hemorrhage even after delivery due to uterine atony from Couvelaire uterus. Nursing Procedure & Medication Flow Procedure: Establishing Large-Bore IV Access 1. Use 16-gauge or 18-gauge IV catheters. 2. Preferred sites: antecubital veins. 3. Use IV pumps capable of rapid infusion for fluids and blood. 4. Have rapid infuser/warmer available if massive transfusion protocol is activated.
Medication Alert: • Oxytocin (Pitocin): Will be given postpartum to contract the uterus. Administer as per protocol via IV infusion, monitoring for water intoxication (headache, nausea) and hypertension. • Blood Products: If transfusing, follow standard protocol. In DIC, may need fresh frozen plasma (FFP), cryoprecipitate, and platelets. A Word from Your Senior Nurse "In an obstetric emergency like this, time is tissue—both uterine and fetal brain tissue. Your calm, efficient actions set the tone for the entire team. Remember, you are the patient's advocate and the coordinator of care at the bedside. Knowing why you avoid a vaginal exam or why you need two big IVs isn't just for the test—it's what allows you to act decisively and confidently when a real life is on the line. This is where textbook knowledge becomes real-world nursing."

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