NCC FETAL MONITORING
PRACTICE QUIZZES PART
2 AND SOLUTIONS
[Document subtitle]
,Sally is a G4 P3 at 35 weeks' gestation. She has a BMI of 32. This
puts her which category?
A. Normal weight
B. Obese, Class I
c. Obese, Class 2
D. Overweight - correct ans:B
Rationale: Obese Class I is a BMI between 30 and 34.9.
Doppler technology used by the US transducer in fetal monitoring
primary detect:
a. actual FH sounds
B. Fetal breathing movements
c. fetal heart movements
d. maternal uterine activity - correct ans:c. fetal heart movements
Rationale: The ultrasound transducer monitors fetal heart rate
through use of high frequency sound waves which detect movement
of the fetal heart. These waves are reflected back to the ultrasound
transducer at different frequencies. The fetal monitor calculates
rate by measuring the shift in frequency between the emitted and
reflected waves, the "Doppler shift". The sound produced by the
monitor is not the actual fetal heart sound, but a digitized
representation of it. Actual fetal heart sounds are heard using a
fetoscope or high quality stethoscope. The Toco detects maternal
uterine activity. Fetal breathing movements are not generally
detectable using the ultrasound transducer from a fetal monitor.
,An advantage of the Toco Transducer when compared with the IUPC
is
a. It is easily re-zero to atmospheric pressure
B. It is more accurate in quantifying uterine contraction pressures
C. It is not affected by maternal position changes
D. It may be used for both antepartum and intrapartum monitoring
of uterine activity - correct ans:D. It may be used for both
antepartum and intrapartum monitoring of uterine
Rationale: Because it is non-invasive and is held in place on the
maternal abdomen with belts, it may be used for both antepartum
and intrapartum monitoring of uterine activity. It can be affected by
maternal position changes, which may require readjustment. It is
the lUPC which is more accurate in quantifying uterine pressures
and which can be re-zeroed to atmospheric pressure.
The correct method for removal of a spiral electrode from the fetal
scalp is to
a. cut the wire and rapidly put the wires apart so that electrode
spins out of the fetal scalp
b. pull the electrode straight out from the fetal scalp with a quick
motion
c. rotate the electrode wires counter-clockwise until the electrode
detaches and is easy to remove
D. slide the guide tube back over the wire and use gloved fingers
vaginally to twist the electrode ot of the fetal scalp - correct ans:c.
rotate the electrode wires counter-clockwise until the electrode
detaches and is easy to remove
, Since the spiral electrode is applied by clockwise rotation, removing
it requires counter-clockwise tion. Pulling the electrode from the
fetal scalp may increase the chance of infection and cause trauma to
scalp. Cutting the wires and pulling them apart is not
recommended, since the rapidly rotating electrode y spin into
adjacent tissues. The guide tube is used to apply the electrode, but
is then discarded.
When comparing the capabilities of the IUPC and Toco Transducer,
the IUPC has the advantage of being able to:
A. Accurately assess fetal heart rate variability
B. Measure actual uterine pressures during contractions and when
at rest
C. Measure maternal blood pressure
D. Time frequency and duration of contractions - correct ans:B.
Measure actual uterine pressures during contractions and when at
rest
The IUPC measures actual intrauterine pressures in mm Hg with a
pressure-sensitive transducer.
1 contraction frequency and duration can be measured using an
IUPC, the toco transducer is also of measuring contraction
frequency and duration. The IUPC does not measure maternal blood.
The ultrasound transducer and spiral electrode are used to assess
fetal heart rate variability.
A fetal heart rate tracing that is skipping between one baseline rate
of 220 and another baseline rate of 110 is most likely due to:
A. A defective ultrasound transducer or fetal spiral electrode
B. Double- counting of a normal fetal baseline rate
PRACTICE QUIZZES PART
2 AND SOLUTIONS
[Document subtitle]
,Sally is a G4 P3 at 35 weeks' gestation. She has a BMI of 32. This
puts her which category?
A. Normal weight
B. Obese, Class I
c. Obese, Class 2
D. Overweight - correct ans:B
Rationale: Obese Class I is a BMI between 30 and 34.9.
Doppler technology used by the US transducer in fetal monitoring
primary detect:
a. actual FH sounds
B. Fetal breathing movements
c. fetal heart movements
d. maternal uterine activity - correct ans:c. fetal heart movements
Rationale: The ultrasound transducer monitors fetal heart rate
through use of high frequency sound waves which detect movement
of the fetal heart. These waves are reflected back to the ultrasound
transducer at different frequencies. The fetal monitor calculates
rate by measuring the shift in frequency between the emitted and
reflected waves, the "Doppler shift". The sound produced by the
monitor is not the actual fetal heart sound, but a digitized
representation of it. Actual fetal heart sounds are heard using a
fetoscope or high quality stethoscope. The Toco detects maternal
uterine activity. Fetal breathing movements are not generally
detectable using the ultrasound transducer from a fetal monitor.
,An advantage of the Toco Transducer when compared with the IUPC
is
a. It is easily re-zero to atmospheric pressure
B. It is more accurate in quantifying uterine contraction pressures
C. It is not affected by maternal position changes
D. It may be used for both antepartum and intrapartum monitoring
of uterine activity - correct ans:D. It may be used for both
antepartum and intrapartum monitoring of uterine
Rationale: Because it is non-invasive and is held in place on the
maternal abdomen with belts, it may be used for both antepartum
and intrapartum monitoring of uterine activity. It can be affected by
maternal position changes, which may require readjustment. It is
the lUPC which is more accurate in quantifying uterine pressures
and which can be re-zeroed to atmospheric pressure.
The correct method for removal of a spiral electrode from the fetal
scalp is to
a. cut the wire and rapidly put the wires apart so that electrode
spins out of the fetal scalp
b. pull the electrode straight out from the fetal scalp with a quick
motion
c. rotate the electrode wires counter-clockwise until the electrode
detaches and is easy to remove
D. slide the guide tube back over the wire and use gloved fingers
vaginally to twist the electrode ot of the fetal scalp - correct ans:c.
rotate the electrode wires counter-clockwise until the electrode
detaches and is easy to remove
, Since the spiral electrode is applied by clockwise rotation, removing
it requires counter-clockwise tion. Pulling the electrode from the
fetal scalp may increase the chance of infection and cause trauma to
scalp. Cutting the wires and pulling them apart is not
recommended, since the rapidly rotating electrode y spin into
adjacent tissues. The guide tube is used to apply the electrode, but
is then discarded.
When comparing the capabilities of the IUPC and Toco Transducer,
the IUPC has the advantage of being able to:
A. Accurately assess fetal heart rate variability
B. Measure actual uterine pressures during contractions and when
at rest
C. Measure maternal blood pressure
D. Time frequency and duration of contractions - correct ans:B.
Measure actual uterine pressures during contractions and when at
rest
The IUPC measures actual intrauterine pressures in mm Hg with a
pressure-sensitive transducer.
1 contraction frequency and duration can be measured using an
IUPC, the toco transducer is also of measuring contraction
frequency and duration. The IUPC does not measure maternal blood.
The ultrasound transducer and spiral electrode are used to assess
fetal heart rate variability.
A fetal heart rate tracing that is skipping between one baseline rate
of 220 and another baseline rate of 110 is most likely due to:
A. A defective ultrasound transducer or fetal spiral electrode
B. Double- counting of a normal fetal baseline rate
