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HESI MATERNITY OB EXAM VERSION 1
1. Which basic type of pelvis includes the correct description and
percentage of occurrence in women?
A) Platypelloid: flattened, wide, shallow; 3%
B) Anthropoid: resembling the ape; narrower; 10%
C) Android: resembling the male; wider oval; 15%
D) Gynecoid: classic female; heart shaped; 75%
Correct Answer: A) Platypelloid: flattened, wide, shallow; 3%
Rationale: The platypelloid pelvis is the least common type, occurring in
approximately 3% of women. It is flattened, wide, and shallow, which
can make vaginal delivery more difficult. The gynecoid pelvis is the most
common and most favorable for vaginal delivery. Android is male-shaped,
and anthropoid is narrow and oval.
,2. What position would be least effective when gravity is desired to
assist in fetal descent?
A) Lithotomy
B) Walking
C) Kneeling
D) Sitting
Correct Answer: A) Lithotomy
Rationale: The lithotomy position places the woman on her back with
legs in stirrups, which works against gravity and does not assist in fetal
descent. Walking, kneeling, and sitting all utilize gravity to help the fetus
descend through the birth canal.
3. The factors that affect the process of labor and birth, known
commonly as the five Ps, include all EXCEPT:
A) Passageway
B) Powers
C) Passenger
D) Pressure
Correct Answer: D) Pressure
,Rationale: The five Ps of labor are: Powers (contractions), Passenger
(fetus and placenta), Passageway (birth canal), Position (of the mother),
and Psychological Response. Pressure is not one of the five Ps.
4. The LPN/LVN providing care for the laboring woman should
understand that amnioinfusion is used to treat:
A) Fetal tachycardia
B) Fetal bradycardia
C) Variable decelerations
D) Late decelerations
Correct Answer: C) Variable decelerations
Rationale: Amnioinfusion is used to relieve umbilical cord compression,
which causes variable decelerations. The infusion of fluid into the
amniotic cavity cushions the cord and reduces compression.
5. The most common cause of decreased variability in the fetal heart
rate (FHR) that lasts 30 minutes or less is:
A) Fetal hypoxemia
B) Fetal sleep cycles
C) Altered cerebral blood flow
, D) Umbilical cord compression
Correct Answer: B) Fetal sleep cycles
Rationale: Fetal sleep cycles are the most common cause of temporary
decreased variability, typically lasting 20-40 minutes. Fetal hypoxemia,
altered cerebral blood flow, and cord compression are more concerning
causes that require intervention.
6. A woman in labor has just received an epidural block. The most
important nursing intervention is to:
A) Limit parenteral fluids
B) Monitor the fetus for possible tachycardia
C) Monitor the maternal blood pressure for possible hypotension
D) Monitor the maternal pulse for possible bradycardia
Correct Answer: C) Monitor the maternal blood pressure for possible
hypotension
Rationale: Epidural anesthesia can cause sympathetic blockade, leading
to maternal hypotension. Hypotension can reduce uteroplacental
perfusion and cause fetal distress. Blood pressure should be monitored
frequently, especially after the initial dose.