Core Nursing Explanation
Key Concept Analysis: This question assesses the nurse's ability to prioritize assessments in a high-risk obstetric emergency. The patient presents with classic signs of a potential
Placental abruption (sudden severe abdominal pain, vaginal bleeding, maternal shock signs, and fetal distress). The core principle is the
ABC (Airway, Breathing, Circulation) priority framework, adapted for the pregnant patient. The primary threat is
Key Point! hypovolemic shock from hemorrhage, indicated by hypotension (
BP 90/60 mmHg) and tachycardia (
HR 120 bpm). The first assessment must directly evaluate the source and severity of the bleeding.
Answer Rationale:
Key Point! Option ②, "Assess the characteristics and amount of vaginal bleeding," is the correct first action. This assessment directly evaluates the
Circulation status. Quantifying blood loss (e.g., saturating pads per hour) and noting the color (bright red vs. dark) provides immediate, critical data to determine the acuity of the hemorrhage and guide resuscitation efforts (e.g., fluid bolus, blood transfusion preparation, urgency of delivery).
Distractor Analysis:
- Option ① (Perform a sterile vaginal exam): Watch out for confusion! In a patient with suspected placenta previa, a vaginal exam is absolutely contraindicated as it can cause catastrophic hemorrhage. While abruption does not carry the same absolute contraindication, in the context of active bleeding and instability, the priority is to assess and stabilize circulation, not to perform an invasive procedure that could worsen the situation or delay critical interventions.
- Option ③ (Obtain urine for protein): This assesses for preeclampsia, which can be associated with abruption. However, it is a diagnostic, not an immediate life-saving assessment. The patient is showing signs of shock; checking urine protein does not address the imminent threat to mother and fetus.
- Option ④ (Measure fundal height/Leopold's maneuvers): While assessing uterine size and fetal position is important, it is secondary to assessing active hemorrhage. Furthermore, in a suspected abruption, the uterus may be tender and rigid (a finding known as Couvelaire uterus), and palpation could be painful and is less urgent than quantifying blood loss.
Related Concepts: This scenario integrates knowledge of obstetric emergencies (
Placental abruption vs. Placenta previa), principles of shock management, and fetal monitoring interpretation (
Late decelerations indicate uteroplacental insufficiency, and
decreased variability is a concerning sign of fetal compromise).