Antepartum Care & Prenatal Assessment Flashcards

Which blood pressure reading meets the diagnostic threshold for gestational hypertension?

Answer: 140/90 mmHg on two occasions ≥4 hours apart after 20 weeks

Gestational hypertension is diagnosed when BP is ≥140/90 mmHg on two separate readings at least 4 hours apart after 20 weeks with no proteinuria.

At what gestational age is Group B Streptococcus (GBS) vaginal-rectal culture routinely collected?

Answer: 35–37 weeks

GBS culture is collected between 35–37 weeks gestation so results are available to guide intrapartum antibiotic prophylaxis decisions.

Which prenatal screening result is most consistent with trisomy 21 (Down syndrome) on quad screen?

Answer: Low AFP, high hCG, low estriol, high inhibin A

Trisomy 21 classically presents with low AFP, elevated hCG, low unconjugated estriol, and elevated inhibin A on the quad screen.

A patient at 28 weeks is Rh-negative with an Rh-positive partner. Which intervention is indicated at this visit?

Answer: Anti-D (Rh) immunoglobulin 300 mcg IM

Rh-negative unsensitized patients receive Rh immunoglobulin at 28 weeks to prevent alloimmunization before delivery.

Which symptom triad is most characteristic of preeclampsia with severe features?

Answer: BP ≥160/110, visual disturbances, and epigastric pain

Severe preeclampsia features include systolic BP ≥160 or diastolic ≥110 mmHg, visual changes, and epigastric/RUQ pain indicating hepatic involvement.

A multiparous patient at 36 weeks reports leaking fluid. Nitrazine paper turns blue-black. What does this finding indicate?

Answer: Rupture of membranes

Blue-black color on nitrazine paper indicates an alkaline pH consistent with amniotic fluid, confirming rupture of membranes.