A nurse is caring for a laboring client at 38 weeks gestation who suddenly develops severe abdominal pain and shows signs of shock. Which assessment finding would be most indicative of uterine rupture?
1Sudden cessation of uterine contractions with relief of pain
2Vaginal bleeding with passage of large clots
3Palpation of fetal parts through the abdominal wall outside the uterus✓ 정답
4Sudden drop in fetal heart rate to 60 beats per minute
해설
Palpation of fetal parts outside the uterus is the most specific sign of uterine rupture, indicating complete separation. Other findings may occur but are less definitive.
Core Nursing Explanation
This question tests your ability to recognize the most pathognomonic (specific and definitive) sign of a catastrophic obstetric emergency: Uterine rupture. Uterine rupture is a full-thickness tear of the uterine wall, which can lead to maternal hemorrhage, fetal compromise, and shock.
Key Concept Analysis
The core theme is differentiating the classic signs of uterine rupture from other obstetric emergencies like Placental abruption. While several signs point to a crisis, the NCLEX often asks for the most indicative or most specific finding. Uterine rupture allows the fetus (or parts of it) to escape the uterine cavity into the peritoneal space.
Answer RationaleKey Point!Palpation of fetal parts through the abdominal wall outside the uterus is the most definitive sign because it directly confirms that the uterine integrity is lost and the fetus is no longer contained within it. This is a classic, textbook sign of complete uterine rupture.
Distractor Analysis
Option 1 (Sudden cessation of contractions with pain relief): This is a hallmark sign of Watch out for confusion!Placental abruption. In abruption, the placenta separates, and the uterus becomes tense and tender ("woody" or board-like), but contractions may stop. The pain in uterine rupture is typically unrelenting and severe.
Option 2 (Vaginal bleeding with large clots): Vaginal bleeding can occur in both uterine rupture and abruption, but it is not specific. Large clots are more suggestive of abruption or other causes of hemorrhage. Uterine rupture often causes concealed (intra-abdominal) bleeding, which may not be visible vaginally.
Option 4 (Sudden fetal bradycardia): This is a critical and common finding in uterine rupture due to fetal hypoxia from placental separation and compromised blood flow. It is a major red flag and often the first sign noticed. However, it is not the *most indicative* because bradycardia can be caused by many other issues (e.g., cord compression, maternal hypotension). The question asks for the finding most specific to the diagnosis of uterine rupture itself.
Related Concepts
Uterine rupture is a surgical emergency. Risk factors include previous cesarean section (especially classical incision), grand multiparity, and overstimulation with oxytocin (Pitocin). Management involves immediate preparation for cesarean hysterectomy, massive fluid and blood product resuscitation, and treating shock.
Concept Summary
Condition
Key Pathophysiology
Classic Signs
Nursing Priority
Uterine Rupture
Full-thickness tear of uterine wall; fetus enters abdomen.
1. Palpable fetal parts outside uterus. 2. Sudden, sharp abdominal pain. 3. Signs of shock (tachycardia, hypotension). 4. Fetal bradycardia.
Premature separation of placenta from uterine wall.
1. Sudden, severe abdominal pain. 2. Board-like, rigid uterus. 3. Dark vaginal bleeding (may be concealed). 4. Fetal distress.
Monitor for disseminated intravascular coagulation (DIC), prepare for possible emergency delivery.
Side-by-Side Comparison!
Feature
Uterine Rupture
Placental Abruption
Pain Character
Sudden, tearing, severe; may be localized to old scar.
Sudden, constant, severe; uterus is rigid and tender.
Uterine Contractions
May stop or continue irregularly.
May become hypertonic or stop; uterus does not relax.
Bleeding
May be vaginal or concealed (intra-abdominal).
Usually dark vaginal bleeding (can be concealed).
Most Pathognomonic Sign
Palpation of fetal parts in abdomen.
Board-like, rigid uterus.
Fetal Status
Often rapid onset of severe bradycardia; fetus may be easily palpable.
Fetal distress common; heart rate patterns show late decelerations, bradycardia.
Anatomy, Physiology & Pharmacology Points
Anatomy: The uterus is a muscular organ. A classical uterine incision (vertical) has a much higher risk of rupture in subsequent pregnancies than a low transverse incision.
Physiology: Rupture causes massive hemorrhage from uterine arteries, leading to hypovolemic shock. It also disrupts placental blood flow, causing acute fetal hypoxia.
Pharmacology: Oxytocin (Pitocin) used for labor induction/augmentation must be carefully titrated. Overstimulation (tachysystole) is a risk factor for uterine rupture.
Memory Tips
Mnemonic for Uterine Rupture: "RUPture" = Relief of pain? No! Unrelenting pain. Palpate fetus in peritoneum.
Think: "If you can feel the baby's elbow through the mom's belly, that baby is NOT in the uterus anymore!"
High-Frequency NCLEX Topics
NCLEX loves to test the differentiation between uterine rupture and placental abruption. Know the one classic, cannot-miss sign for each. Also, be ready for questions on priority nursing actions for a client in shock from an obstetric cause (e.g., position on left side, oxygen, large-bore IVs, notify provider).
Watch Out for Question Variations!
Shift from Sign to Action: "The nurse palpates fetal parts outside the uterus. What is the priority action?" (Answer: Notify the physician/midwife and prepare for emergency cesarean delivery).
Shift to Risk Factors: "Which client is at greatest risk for uterine rupture?" (Answer: A client at 40 weeks gestation with a previous classical cesarean section who is undergoing induction with oxytocin).
Shift to Post-op Care: After a hysterectomy for uterine rupture, what is a key postoperative assessment? (Monitor for signs of continued bleeding and shock).
Nursing Clinical Practice GuideClinical Scenario
You are the labor nurse for Maria, a G2P1001 at 39 weeks, laboring with a history of one previous low transverse cesarean section (C-section). She is receiving oxytocin (Pitocin) for augmentation. Suddenly, she screams in pain, clutches her abdomen, and says, "It feels like something ripped!" You note her heart rate is 130 bpm, blood pressure is 88/50 mmHg, and the fetal heart rate (FHR) monitor shows a prolonged deceleration to 70 bpm.
Nursing Intervention Strategy
Immediate Assessment (Seconds): Check FHR, assess pain location/character (ask about tearing sensation), quickly palpate abdomen. Key Point! In this scenario, if you palpate a distinct fetal part (like a head or limb) far from the expected uterine fundus, this confirms suspicion.
Activate Emergency Response: Call for help (obstetrician, anesthesiologist, neonatal team) using the emergency call system. State clearly: "Possible uterine rupture in Room 5, patient showing shock and fetal bradycardia."
Stabilize the Patient:
Position: Place in left lateral tilt to improve venous return and placental perfusion.
Oxygen: Apply non-rebreather mask at 10-15 L/min.
IV Access: Ensure two large-bore IV catheters (16- or 18-gauge) are patent. Begin rapid infusion of isotonic crystalloid (e.g., Lactated Ringer's).
Monitor: Continuous vital signs and pulse oximetry. Prepare for stat labs (CBC, type and crossmatch for 4+ units of blood).
Prepare for Surgery: The patient will need an emergency cesarean delivery, likely followed by hysterectomy to control bleeding. Ensure the operating room is notified and the consent form is signed. Discontinue oxytocin infusion immediately.
Patient Safety and Precautions
Never attempt to push or perform a vaginal exam if uterine rupture is suspected, as this could worsen the tear.
Communication is critical: Keep the patient and family informed in a calm manner. "We are taking you for surgery right now to help you and your baby."
Post-operatively, closely monitor for signs of continued hemorrhage, infection, and shock. Assess for signs of grief if fetal loss occurred.
Nursing Procedure & Medication FlowIn an OB Emergency:
1. Stop the Oxytocin: First action if uterine hyperstimulation or rupture is suspected.
2. Fluid Resuscitation: Bolus 1-2 liters of warmed isotonic fluid rapidly.
3. Blood Products: Administer O-negative blood immediately if crossmatched blood is not ready and the patient is unstable. Follow massive transfusion protocol (packed red blood cells, fresh frozen plasma, platelets in a 1:1:1 ratio).
4. Medications: May administer uterotonics (like Methylergonovine or Carboprost) after delivery to promote uterine contraction, but if the uterus is ruptured, surgical control is primary.
A Word from Your Senior Nurse
"Uterine rupture is one of the scariest moments in labor and delivery. Your knowledge and swift action directly save two lives. Remember, trust your assessment. If a laboring patient with a prior C-section has a sudden, profound change in status—think RUPTURE first. Don't get distracted by less specific signs. Your ability to recognize that one classic finding and activate the team without hesitation is what makes you an outstanding nurse. In your studies, link the pathophysiology (the tear) to the clinical sign (palpable fetus) to the action (STAT surgery). That connection is the heart of safe nursing practice."
Uterine Rupture — A full-thickness tear through the uterine wall and serosa, often occurring during labor, which can lead to expulsion of the fetus into the peritoneal cavity, massive hemorrhage, and fetal compromise.
Placental Abruption — Premature separation of a normally implanted placenta from the uterine wall before delivery of the fetus, causing pain, dark vaginal bleeding, uterine rigidity, and risk of fetal distress and maternal coagulopathy (DIC).
Hypovolemic Shock — A life-threatening condition caused by loss of blood or fluid volume (as in obstetric hemorrhage), leading to inadequate tissue perfusion, characterized by tachycardia, hypotension, cool clammy skin, and altered mental status.
Oxytocin — A hormone and medication used to induce or augment labor by stimulating uterine contractions. Must be carefully titrated to avoid tachysystole (excessive contractions), which is a risk factor for uterine rupture, especially in patients with a uterine scar.
Classical Cesarean Incision — A vertical incision made in the upper, muscular segment of the uterus. It carries a significantly higher risk of rupture in subsequent pregnancies compared to the more common low transverse incision and is generally avoided unless absolutely necessary.