A nurse is caring for a laboring client who is at 38 weeks gestation. Which assessment finding would be the MOST concerning and require immediate intervention for suspected uterine rupture?
1Sudden cessation of contractions with severe abdominal pain and maternal tachycardia✓ 정답
2Fetal heart rate showing late decelerations with moderate variability
3Maternal blood pressure of 160/100 mmHg with proteinuria
4Cervical dilation remaining at 6 cm for the past 2 hours
해설
Uterine rupture is a life-threatening emergency. The classic triad (sudden cessation of contractions, severe abdominal pain, maternal tachycardia) in option 1 requires immediate intervention. Other options represent complications (late decelerations, preeclampsia, arrest of labor) that are less immediately life-threatening.
Core Nursing ExplanationKey Concept Analysis: This question tests the nurse's ability to recognize the signs of Uterine rupture, a catastrophic obstetric emergency. Uterine rupture is a full-thickness tear of the uterine wall, most often associated with a previous cesarean scar. It leads to maternal hemorrhage, fetal compromise, and requires immediate surgical intervention (cesarean hysterectomy). The pathophysiology involves the tearing of the uterine muscle and serosa, causing sudden internal bleeding, loss of uterine tone, and often expulsion of the fetus into the abdominal cavity.
Answer Rationale: Key Point! Option ① presents the classic, ominous signs of uterine rupture. The "sudden cessation of contractions" indicates a loss of uterine integrity and tone. The "severe abdominal pain" is often described as tearing or ripping and is constant, not cyclical. "Maternal tachycardia" is an early sign of hypovolemic shock from internal hemorrhage. This triad signals an immediate threat to both mother and fetus, demanding rapid diagnosis and emergency laparotomy.
Distractor Analysis:
Watch out for confusion! Option ②: Late decelerations with moderate variability indicate uteroplacental insufficiency (e.g., from preeclampsia or abruption). While serious and requiring intervention (like position change, oxygen, IV fluids), they do not alone signify the immediate, catastrophic event of uterine rupture.
Option ③: A BP of 160/100 mmHg with proteinuria meets criteria for Preeclampsia. This is a hypertensive disorder requiring management (e.g., magnesium sulfate, antihypertensives, delivery planning) but is not the *most* immediately life-threatening finding in this list compared to active hemorrhage.
Option ④: Cervical dilation arrest (e.g., at 6 cm for 2+ hours) defines the Active phase arrest of labor. This requires evaluation and may lead to augmentation or cesarean delivery, but it is a slower, progressive complication, not an acute emergency like rupture.
Related Concepts: Uterine rupture must be distinguished from Placental abruption (painful, dark vaginal bleeding, uterine hypertonicity) and Vasa previa (painless vaginal bleeding with fetal bradycardia after rupture of membranes). The greatest risk factor is a previous classical (vertical) uterine incision. Nursing priority is ABCs (Airway, Breathing, Circulation), establishing large-bore IV access for fluid/blood resuscitation, and preparing for immediate surgery.
Concept Summary
Condition
Key Features
Nursing Priority
Uterine Rupture
Sudden pain, contraction cessation, maternal shock (tachycardia, hypotension), fetal distress, loss of station.
Immediate notification, prepare for emergency cesarean/hysterectomy, massive transfusion protocol.
Placental Abruption
Painful dark vaginal bleeding, board-like rigid uterus, fetal distress.
Monitor for DIC (Disseminated Intravascular Coagulation), prepare for urgent delivery.
Preeclampsia with Severe Features
BP ≥160/110, proteinuria, headache, visual changes, epigastric pain.
Seizure prophylaxis with MgSO4 (Magnesium Sulfate), prepare for delivery.
Fetal Distress (Late Decels)
Repetitive late decelerations, possibly with minimal variability.
Position change (left lateral), O2, IV fluids, discontinue Pitocin, prepare for possible operative delivery.
Side-by-Side Comparison!
Sign/Symptom
Uterine Rupture
Placental Abruption
Pain
Sudden, severe, tearing/ripping, constant
Sudden, severe, constant, localized
Uterine Contractions
May suddenly STOP
May be hypertonic, "board-like"
Vaginal Bleeding
May be minimal (concealed) or significant
Dark, may be concealed or apparent
Maternal Status
Tachycardia, hypotension (shock) early
Shock proportional to visible blood loss (may be concealed)
Fetal Status
Severe distress (bradycardia), loss of station
Distress common
Anatomy, Physiology & Pharmacology Points
The uterus is a muscular organ. A previous cesarean scar is the weakest point. During labor, strong contractions can cause the scar to dehiscence (thin) or rupture (full tear). Pharmacologically, excessive use of Oxytocin (Pitocin) for labor augmentation increases uterine contraction strength and is a risk factor for rupture. Medications like Terbutaline (a tocolytic) may be used to relax the uterus in cases of suspected impending rupture, but definitive treatment is surgical.
Memory TipsAcronym for Uterine Rupture Triad: "CAT" Cessation of Contractions Abdominal pain (severe, tearing) Tachycardia (maternal)
Remember: When the uterus ruptures, the "CAT" is out of the bag (fetus into abdomen)!
High-Frequency NCLEX Topics
Uterine rupture is a high-priority emergency topic. The NCLEX-RN often tests:
1. Identifying the most urgent finding among several complications (as in this question).
2. Priority nursing actions: Notify provider STAT, prepare for surgery, establish IV access.
3. Risk factors: Previous cesarean (especially classical incision), grand multiparity, overdistention (twins, polyhydramnios).
Watch Out for Question Variations!
* Instead of "most concerning finding," the question may ask: "The nurse's priority action is to..." (Answer: Notify the provider and prepare for emergency cesarean section).
* It may present a scenario with a client with a previous cesarean undergoing a trial of labor after cesarean (TOLAC) and ask for signs of impending rupture (e.g., localized scar pain, abnormal fetal heart rate patterns like prolonged decelerations).
* It could combine with shock symptoms (hypotension, pallor, cool clammy skin) and ask the nurse to recognize hypovolemic shock from hemorrhage.
Nursing Clinical Practice GuideClinical Scenario: You are the labor nurse for Maria, G2P1 at 39 weeks, who is attempting a vaginal birth after cesarean (VBAC). She has been laboring well with Pitocin augmentation. Suddenly, she cries out, "Something ripped! The pain is horrible!" You note her contractions on the monitor have stopped. Her heart rate is 128 bpm, and the fetal heart rate shows a prolonged deceleration to 80 bpm.
Nursing Intervention Strategy:
1Immediate AssessmentStay calm. Assess maternal vital signs (tachycardia, hypotension). Palpate the abdomen - is it rigid or tender? Check for vaginal bleeding. Assess fetal heart rate continuously.
2Critical Actions* Call for help. Yell for another nurse and notify the obstetrician/CNM STAT. Announce "Possible uterine rupture."
* Discontinue any Pitocin infusion immediately.
* Administer high-flow oxygen via non-rebreather mask at 10-15 L/min.
* Turn patient to left lateral position if possible.
* Establish or verify two large-bore (16- or 18-gauge) IV lines.
* Draw stat labs: CBC, type and crossmatch for 4+ units of blood.
3Preparation for SurgeryRapidly transport to the operating room. Inform the OR team. Ensure consent for cesarean section and possible hysterectomy is obtained.
Patient Safety and Precautions:
* Never leave the patient alone.
* Do not perform vigorous vaginal exams, as this may worsen the situation.
* Time is tissue. Delays in recognition and intervention lead to fetal death and maternal mortality from exsanguination.
* Monitor for signs of Disseminated Intravascular Coagulation (DIC) (oozing from IV sites, petechiae) due to massive hemorrhage.
Nursing Procedure & Medication FlowEmergency Response for Suspected Uterine Rupture:
1AlertActivate emergency obstetric protocol.
2Airway/BreathingApply O2.
3CirculationTwo large-bore IVs → Run isotonic crystalloid (Normal Saline or Lactated Ringer's) wide open. Prepare for blood transfusion.
4MonitoringContinuous maternal ECG, pulse oximetry, and fetal monitoring until delivery.
5MedicationAnticipate orders for:
* Oxytocin (Pitocin) or Methylergonovine (Methergine) postpartum for uterine atony, BUT these are contraindicated if hysterectomy is performed.
* Tranexamic acid (TXA) may be given to reduce bleeding.
* Antibiotics for surgical prophylaxis.
A Word from Your Senior Nurse
In labor and delivery, your vigilance is the safety net. A patient with a uterine scar is not just another laboring patient; she carries a specific, serious risk. Trust the patient when she describes a "tearing" pain—it's a classic symptom you must never ignore. On the NCLEX and in practice, the principle is the same: the finding that indicates immediate, catastrophic blood loss (like the signs of rupture) always takes priority over other serious but less imminently lethal conditions. Your quick thinking and systematic response can save two lives.