RNC-OB Exam Questions and Answers Latest Update (100% Pass)
Normal AFI range - Answers 5-24cm
Oligo range - Answers AFI <5cm
Folic Acid Required - Answers 0.4 mg, 1mg if deficient
Thrombocytopenia threshold - Answers Plt count <150,000 mcg/L
Pre-E thresholds (proteinuria) - Answers 300mg/24h, 1g/L on dipstick
Iron needs during pregnancy - Answers 30mg daily, increase 60-120 in anemia while HCT abnormal
polyhydramnios threshold - Answers AFI >24cm
Safest antidepressant in PG - Answers Buspirone (class B)
Suboxone or Subutex in of? - Answers Subutex. No naloxone
Reassuring fetal
Kick count - Answers 10 movements in 2 hours
fFN (fetal fibronectin) - Answers - test most accurate
NST parameters - Answers 2 15x15 accels within 20 min, during 40 min test. >32 weeks
Variable decel parameter - Answers <30 sec to nadir
Decrease at least 15 bpm
>15 sec duration, but <2 min
Tachysystole parameters - Answers 6 or more ctxns in 10 min
Series of ctxns 2min or greater
Intermittent FHR monitoring parameters - Answers Q30, 1st stage
Q15, 2nd stage
Double frequency in high risk or use continuous
Max pressure for vacuum - Answers 600mm Hg
Total max time for vacuum - Answers 15-20 min
Parameters for Gestational HTN - Answers begins after 20 weeks, ends before 3months PP
, HIV transmission rate, untreated - Answers 30%
HIV transmission rate, Treated - Answers 1-2%
Timing for antivirals, HIV exposed neonates - Answers 6-12 hours after delivery, continue 6 weeks
Effect of Gonorrhea on pg - Answers weakens membranes, PTL/PROM, infection of neonate with
ophthalmia neonatorum
Transmission rates of untreated primary or secondary Syphilis - Answers 50-80%
Treatment of Syphilis--drug - Answers Benzathine Penicillin G
Findings in neonatal congenital Syphilis - Answers mucous patches, skin lesions, gumma, neuro
impairment
When does "late onset" congenital syphilis occur? - Answers after 2 years of age
Symptoms of neonatal Herpes infection - Answers vesicles, fever, seizures, poor feeding, encephalitis,
jaundice
How to treat maternal influenza? - Answers Oseltamivir within 48 hours and anti-pyretics
Risks of maternal influenza: - Answers PTL, stillbirth, neural tube defects from fever.
Risks of Bacterial Vaginosis to pg - Answers SAB, PTL, PROM, chorio.
What are risk/benefit of antivirals during pg? Category? - Answers Category C. Benefits outweigh risks
What is and what causes megaloblastic anemia? - Answers RBC enlarge rather than divide. Folic Acid
deficiency.
Why does pg cause iron-deficient (physiologic) anemia? - Answers dilution of rbc b/c of increase in blood
plasma
Parameters for thrombocytopenia - Answers PLT <150,000mcg/L
Fetal Plt count can/cannot be predicted based on maternal count? - Answers cannot.
What is treatment for hemolytic anemia in pg? - Answers corticosteriods
Which meds can cause drug-induced hemolytic anemia in pg? - Answers cephalosporins, NSAIDS,
dapsone, pcn
Most rapid and severe onset of hemolytic anemia in pg is caused by? - Answers Exotoxin from C.
Perfringens or Group A/B hemolytic strep. (sometimes from pyelo)
What things trigger DIC? - Answers abruption, rupture, AFE, Eclampsia, PPH, hypovolemic shock, dead
fetus, infection, sepsis, abortion
