A 25-year-old gravida 1, para 0 client at 36 weeks gestation presents to the emergency department with sudden onset of bright red, painless vaginal bleeding. Which assessment finding would be most indicative of placenta previa?

Placenta previa is characterized by painless, bright red vaginal bleeding with a soft uterus, distinguishing it from abruptio placentae. Other options describe features of abruptio placentae or other conditions.

Core Nursing Explanation Key Concept Analysis: This question tests the critical differentiation between two major causes of third-trimester bleeding: Placenta Previa and Abruptio Placentae (Placental Abruption). The core theme is identifying the classic, pathognomonic presentation of placenta previa. In placenta previa, the placenta implants in the lower uterine segment, covering or lying near the internal cervical os. When the lower uterine segment thins and stretches in the third trimester (a process called effacement and dilation), placental vessels are torn, leading to bleeding. This bleeding is typically painless because it originates from the separation of the placenta from the uterine wall at a site with minimal muscle and nerve involvement. The uterus remains soft and non-tender because there is no associated muscular contraction or concealed hemorrhage causing uterine irritability.

Answer Rationale: Key Point! The description in option ②, "Painless, bright red vaginal bleeding with soft uterus," is the textbook definition of placenta previa. The bleeding is bright red because it is fresh, arterial blood from the disrupted vessels. The absence of pain and a soft uterus are the key differentiators from abruption.

Distractor Analysis:
• Option ① (Severe abdominal pain with rigid uterus): This describes the classic presentation of Watch out for confusion! Abruptio Placentae. In abruption, the premature separation of a normally implanted placenta causes bleeding into the decidua basalis, leading to intense pain, uterine tenderness, and often a "board-like" rigid uterus due to tetanic contractions. The bleeding may be concealed or dark.
• Option ③ (Dark red bleeding with strong uterine contractions): This also points toward Abruptio Placentae. Dark red blood suggests older, venous bleeding that may be trapped behind the placenta. Strong, often painful contractions are a hallmark of abruption.
• Option ④ (Intermittent bleeding with cervical dilation): This is not characteristic of either major placental cause. It could describe other conditions like "bloody show" associated with normal labor onset, cervical lesions, or other non-placental sources of bleeding.

Related Concepts: The immediate nursing priority for suspected placenta previa is to avoid any vaginal manipulation (including digital exams) to prevent catastrophic hemorrhage. Diagnosis is confirmed via Transabdominal ultrasound, and management depends on gestational age and severity of bleeding, ranging from bed rest and observation to emergency cesarean delivery.

Nursing Clinical Practice Guide Clinical Scenario: You are the triage nurse in Labor & Delivery. A patient, Ms. Lopez, at 34 weeks gestation is brought in by her partner. She reports she was resting on the couch when she felt a sudden gush of bright red blood, enough to soak her underwear and pants. She denies any pain or cramping. She appears anxious but not in acute distress.

Nursing Intervention Strategy: 1. Immediate Assessment & Safety: Place the patient on strict bed rest in a lateral position. Apply external fetal monitoring (EFM) to assess fetal heart rate (FHR) and uterine activity. Obtain vital signs, noting signs of hypovolemia (tachycardia, hypotension). Key Point! Under NO circumstances perform a digital vaginal exam. Place a large peripad to quantify bleeding. 2. Communication & Preparation: Notify the obstetrician immediately. Start two large-bore IV lines with normal saline or lactated Ringer's for fluid resuscitation. Draw stat labs: CBC (Complete Blood Count), type and crossmatch for at least 4 units of blood, coagulation studies. 3. Ongoing Monitoring & Support: Continuously monitor FHR for signs of distress (late decelerations, bradycardia). Monitor uterine tone by palpation (should remain soft) and via the tocodynamometer. Provide emotional support and clear explanations to the patient and family.

Patient Safety and Precautions: The cardinal rule is "No vaginal exams in painless third-trimester bleeding until placenta previa is ruled out by ultrasound." An exam can disrupt the placenta further, causing massive, life-threatening hemorrhage for both mother and fetus.

Nursing Procedure & Medication Flow • Procedure: Management of Suspected Placenta Previa: Bed rest → Continuous EFM → IV access/labs → Ultrasound confirmation → Decision for expectant management (if stable,