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!
①
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.
②
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.
③
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
| Concept | Key Points |
|---|
| Placental Abruption | Premature separation. Presents with painful dark red bleeding, uterine tenderness/rigidity, fetal distress. Risk of maternal hemorrhage/DIC. |
| Priority Intervention | ABCs. Large-bore IV access (x2), fluid/blood resuscitation, continuous FHR monitoring, prepare for emergency delivery. |
| Contraindicated Actions | Vaginal exams (until previa ruled out), tocolytics, delaying definitive treatment. |
| Fetal Monitoring Finding | Late decelerations (placental insufficiency) or variable decelerations (cord compression from blood). |
Side-by-Side Comparison!
| Feature | Placental Abruption | Placenta Previa |
|---|
| Pain | Sudden, severe abdominal pain | Usually painless bleeding |
| Bleeding | Dark red, may be concealed | Bright red, painless |
| Uterus | Tender, firm, "woody" hard, hypertonic | Soft, non-tender |
| Fetal Presentation | May not be affected initially | Often malpresentation (breech, transverse) |
| Priority Nursing Action | IV access, prepare for emergency C-section | No vaginal exams, monitor, prepare for C-section |
Anatomy, Physiology & Pharmacology Points
•
Pathophysiology: 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 Tips
•
Abruption = 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).