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Rnc-OB Questions And Answers With Verified Solutions Already Passed!!!

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Rnc-OB Questions And Answers With Verified Solutions Already Passed!!!

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  • September 11, 2024
  • 55
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • naegele rule
  • RNC
  • RNC
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Rnc-OB Questions And Answers With
Verified Solutions Already Passed!!!
naegele rule - ANSWER✔✔Method of determining due date


how to determine Naegele Rule? - ANSWER✔✔determine date of onset of LMP,
add 7 days, subtract 3 months.


alternative method to determine EDD - ANSWER✔✔determine date of onset of
LMP, count 40 weeks from that day


fetal development sequence - ANSWER✔✔fertilization of egg by sperm,
blastocyst, uterine implantation, embryonic stage, fetal stage


invasive prenatal screening - ANSWER✔✔CVS, PUBS, Amniocentesis


mothers who are RH- and unimmunized should receive ____________ prior to
procedures as prophylaxis. - ANSWER✔✔300 mg IM Rh Immune Globulin


CVS - Chorionic Villus Sampling - ANSWER✔✔tests tissue from the placenta -
used to obtain trophoblast cells for analysis; transcervical or transabdominal
approach depending on placental location


when is a CVS performed? - ANSWER✔✔10-13 weeks


contraindications for CVS - ANSWER✔✔maternal Rh sensitization, active
vaginal/cervical infection, uterine fibroids, vag bleeding in last 2 weeks, marked
retroverted/retroflexed uterus

,Cordocentesis (PUBS - Percutaneous Umbilical Blood Sampling) procedure -
ANSWER✔✔tests fetal blood - usually sampled from where the cord enters the
placenta; umbilical vein preferred due to less risk of fetal bradycardia


when is PUBS performed? - ANSWER✔✔after 17 weeks


How is blood taken during PUBS confirmed to be fetal? - ANSWER✔✔MCV
>100


What does PUBS stand for? - ANSWER✔✔Percutaneous Umbilical Blood
Sampling - also called cordocentesis


what does PUBS detect? - ANSWER✔✔fetal infections, blood disorders, and
chromosomal abnormalities. does not give information about neural tube defects.


most common complication from PUBS? - ANSWER✔✔bleeding from cord
puncture site


what are signs of pregnancy? - ANSWER✔✔hegar sign, chadwick sign, goodell
sign


hegar sign - ANSWER✔✔lower uterine softening, presents as early as 4 weeks
lasts until week 12


chadwick sign - ANSWER✔✔change of labia, cervical , or vaginal color from
pink to bluish violet - noted as early as 6 weeks

,goodell sign - ANSWER✔✔cervical softening due to increased vascularization,
vessels below the uterus engorge from tissue hypertrophy


when is the first trimester? - ANSWER✔✔time from fertilization to the 12th week
of pregnancy - includes embryonic stage (weeks 3-8)


major occurrences of first trimester - ANSWER✔✔implantation
major organ development
bone and tooth bud development
sexual organs distinguishable
nail beds form
spontaneous fetal movements begin
heartbeat audible via doppler in 12th week
some reflexes may be present (babinski)


when is the second trimester? - ANSWER✔✔13th week to the end of week 26


the second trimester is also called the - ANSWER✔✔"honeymoon" period


major occurrences of the second trimester? - ANSWER✔✔bone formation
urine is excreted into the amniotic fluid
fetal brain/CNS development
fetal lung/alveolar development
fetal startle reflex present

, eyes and ears develop
sucking motions may be present
subcutaneous fat begins to accumulate


what occurs late in second trimester? - ANSWER✔✔swallowing, hair patterns,
lanugo, vernix, surfactant, fingerprints, testes begin to descend, sleep/wake
patterns noticeable


quad screen - ANSWER✔✔measures amount of 4 markers in maternal blood to
help diagnose spina bifida, down syndrome, or trisomy 18


what are the four markers the quad screen tests for? - ANSWER✔✔alpha-
fetoprotein (AFP) - produced by fetus
human chorionic gonadotropin (hCG) - produced by placenta
estriol unconjugated - produced by placenta and fetus
dimeric inhibin-A - produced by placenta and ovaries


when is the quad screen performed? - ANSWER✔✔between weeks 15 - 22


a positive quad screen may be followed up with what to confirm? -
ANSWER✔✔amniocentesis


inhibin-A in a quad screen increased the likelihood of identifying
____________________ and decreases the risk of ______________________. -
ANSWER✔✔down syndrome, false positives

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