A nurse is caring for a laboring client at 36 weeks gestation with a history of myomectomy who suddenly reports severe abdominal pain and states "something tore inside me." The fetal heart rate tracing shows sudden onset of bradycardia. What is the most critical assessment the nurse should perform immediately?
1Check the client's blood pressure and pulse rate
2Palpate the abdomen for fetal parts and uterine contour✓ 정답
3Perform a sterile vaginal examination to assess cervical dilation
4Auscultate fetal heart tones with a Doppler device
해설
Uterine rupture is a life-threatening emergency. The most critical immediate assessment is palpating the abdomen for fetal parts and uterine contour (option 2) to detect the pathognomonic sign. Other assessments (vital signs, vaginal exam, auscultation) are less urgent.
The client’s history of a myomectomy, the sudden onset of severe abdominal pain with a tearing sensation, and the abrupt fetal bradycardia create a classic clinical picture of uterine rupture. This is a life-threatening obstetric emergency where the integrity of the uterine wall is compromised. In this scenario, the most critical and immediate nursing assessment is to palpate the abdomen for fetal parts and uterine contour.
The rationale for this priority is grounded in the pathophysiology of a complete uterine rupture. When the uterus tears, the fetus can be extruded from the protective uterine cavity into the maternal abdominal cavity. This leads directly to the two most ominous signs: the sudden onset of fetal bradycardia and the mother’s sensation of a tear. Fetal bradycardia occurs because the rupture compromises uteroplacental blood flow, causing acute fetal hypoxia . Palpation is the fastest, non-invasive method to confirm the rupture’s occurrence. A nurse would feel an abrupt loss of the normal uterine contour and, critically, may be able to palpate fetal small parts (e.g., hands, feet) directly under the abdominal wall, separate from the contracted uterus. This finding confirms the catastrophic displacement of the fetus and explains the sudden bradycardia, guiding the team toward immediate surgical intervention.
The other assessment options are either secondary or dangerously time-consuming in this specific crisis. While checking blood pressure and pulse (Option 1) is essential for identifying hypovolemic shock from hemorrhage, it is a secondary assessment. The presence of shock confirms blood loss but does not provide the direct anatomical evidence of rupture that abdominal palpation does. A sterile vaginal examination (Option 3) is contraindicated as it will not diagnose a rupture in the fundus or body of the uterus—common sites for myomectomy scar rupture—and it wastes precious time while potentially introducing infection or worsening bleeding [1,2]. Auscultating fetal heart tones with a Doppler (Option 4) is redundant because the fetal monitor is already tracing a bradycardia; the priority is to immediately determine the cause of that bradycardia, not to reconfirm its presence. The sudden nature of the pain and tracing change, particularly in a patient with a prior uterine surgery, makes uterine rupture the presumptive diagnosis until proven otherwise [2,3]. The nurse’s immediate palpation findings provide the critical data needed to activate the emergency response and prepare for an emergency cesarean section.
Clinical Practice Guide: Suspected Uterine Rupture
A history of uterine surgery, sudden severe tearing pain, and abrupt fetal bradycardia constitute a classic triad for uterine rupture. Immediate recognition and intervention are critical for maternal and fetal survival.
Priority Assessment
Abdominal Palpation: The most critical bedside assessment. Feel for a loss of the normal uterine contour and the presence of fetal parts directly under the abdominal wall, indicating fetal extrusion into the peritoneal cavity.
Simultaneous Actions: While one nurse palpates, another must immediately notify the provider, initiate a rapid response, and prepare for emergency cesarean section.
Key Clinical Findings
Maternal: Sudden, severe, tearing abdominal pain; cessation of contractions; signs of shock (tachycardia, hypotension) which may be disproportionate to visible blood loss.
Fetal: Sudden, profound bradycardia or undetectable heart rate; loss of the presenting part on palpation.
Nursing Interventions
Activate the obstetric emergency response team immediately.
Administer high-flow oxygen via non-rebreather mask and establish large-bore IV access for fluid resuscitation.
Prepare for immediate laparotomy and cesarean delivery; the decision-to-delivery interval goal is less than 30 minutes.
Anticipate the need for blood product transfusion and prepare for potential hysterectomy.
Critical Safety Alert
Do not perform a vaginal examination if rupture is suspected. It provides no diagnostic value for the rupture itself and wastes precious time. Do not rely solely on continuous fetal monitoring to confirm the diagnosis; the clinical signs and abdominal assessment take priority.
Uterine Rupture — A complete separation of all uterine wall layers, allowing fetal extrusion into the maternal abdominal cavity, often presenting with sudden severe pain and fetal bradycardia.
Myomectomy — Surgical removal of uterine fibroids that creates a scar on the uterus, increasing the risk of rupture during subsequent labor.
Fetal Bradycardia — A fetal heart rate below 110 bpm, which in this context indicates acute hypoxia due to compromised uteroplacental blood flow from the rupture.
Uterine Contour — The normal rounded shape of the uterus; a loss of this contour on palpation suggests the uterus has torn and the fetus has shifted.