A 34-week pregnant patient with heavy vaginal bleeding and no abdominal pain is most consistent with which diagnosis?

Prepare for the Paramedic Readiness Exam 4 with our engaging quiz. Hone your skills with targeted questions, hints, and in-depth explanations. Excel on your exam with confidence!

Painless vaginal bleeding in the late third trimester most strongly points to placenta previa. When the placenta implants near or over the internal cervical Os, the cervix can start to bleed as it thins and dilates, but there is typically no uterine pain or contractions. That lack of abdominal pain helps distinguish it from other common causes.

Ectopic pregnancy usually presents earlier in gestation with abdominal or pelvic pain and often adnexal tenderness, not at 34 weeks. Placental abruption involves painful bleeding with a tender, often firm uterus and signs of uterine irritability or distress. Uterine rupture tends to present with sudden, severe abdominal pain, fetal distress, and a typically altered or loss of fetal station, often in labor or with a scarred uterus. Given the timing and absence of pain, placenta previa is the best fit.

Diagnosis is confirmed by ultrasound to locate the placenta. Management focuses on stabilizing the mother and fetus, avoiding vaginal examinations that could worsen bleeding, and planning delivery (often by cesarean) if placenta previa persists or the pregnancy reaches viability with ongoing bleeding.