CH 14: lntrapartum Fetal Surveillance Flashcards
- The nurse evaluates a pattern on the fetal monitor that appears similar to early decelerations.
The deceleration begins near the acme of the contraction and continues well beyond the end of
the contraction. Which nursing action indicates the proper evaluation of this situation?
a.
This pattern reflects variable decelerations. No interventions are necessary at this
time.
b.
Document this Category I fetal heart rate pattern and decrease the rate of the
intravenous (IV) fluid.
c.
Continue to monitor these early decelerations, which occur as the fetal head is
compressed during a contraction.
d.
This deceleration pattern is associated with uteroplacental insufficiency. The nurse
must act quickly to improve placental blood flow and fetal oxygen supply.
ANS: D
A pattern similar to early decelerations, but the deceleration begins near the acme of the
contraction and continues well beyond the end of the contraction, describes a late
deceleration. Oxygen should be given via a snug face mask. Position the patient on her left
side to increase placental blood flow. Variable decelerations are caused by cord compression.
A vaginal examination should be performed to identify this potential emergency. This is not a
normal pattern, rather it is a Category III tracing, predictive of abnormal fetal acid status at the
time of observation. The IV rate should be increased in order to add to the mother’s blood
volume. These are late decelerations, not early; therefore interventions are necessary.
- Which maternal condition should be considered a contraindication for the application of
internal monitoring devices?
a.
Unruptured membranes
b.
Cervix dilated to 4 cm
c.
Fetus has known heart defect
d.
Maternal HIV
ANS: A
To apply internal monitoring devices, the membranes must be ruptured. Cervical dilation of 4
cm would permit the insertion of fetal scalp electrodes and an intrauterine catheter. A
compromised fetus should be monitored with the most accurate monitoring devices. An
internal electrode should not be placed if the patient has hemophilia, maternal HIV, or genital
herpes
- The nurse is instructing a nursing student on the application of fetal monitoring devices.
Which method of assessing the fetal heart rate requires the use of a gel?
a.
Doppler
b.
Fetoscope
c.
Scalp electrode
d.
Tocodynamometer
.
ANS: A
Doppler is the only listed method involving ultrasonic transmission of fetal heart rates; it
requires the use of a gel. The fetoscope does not require gel because ultrasonic transmission is
not used. The scalp electrode is attached to the fetal scalp; gel is not necessary. The
tocodynamometer does not require gel. This device monitors uterine contractions
- Proper placement of the tocotransducer for electronic fetal monitoring is
a.
Inside the uterus.
b.
On the fetal scalp.
c.
Over the uterine fundus.
d.
Over the mother’s lower abdomen.
ANS: C
The tocotransducer monitors uterine activity and should be placed over the fundus, where the
most intensive uterine contractions occur. The tocotransducer is for external use. The
tocotransducer monitors uterine contractions. The most intensive uterine contractions occur at
the fundus; this is the best placement area
- Which clinical finding can be determined only by electronic fetal monitoring?
a.
Variability
b.
Tachycardia
c.
Bradycardia
d.
Fetal response to contractions
ANS: A
Beat-to-beat variability cannot be determined by auscultation because auscultation provides
only an average fetal heart rate (FHR) as it fluctuates. Tachycardia can be determined by any
of the FHR monitoring techniques. Bradycardia can be determined by any of the FHR
monitoring techniques. The fetal response to the contractions is usually noted by an increase
or decrease in fetal heart rate. These can be determined by any of the FHR monitoring
techniques
- Which method of intrapartum fetal monitoring is the most appropriate when a woman has a
history of hypertension during pregnancy?
a.
Continuous auscultation with a fetoscope
b.
Continuous electronic fetal monitoring
c.
Intermittent assessment with a Doppler transducer
d.
Intermittent electronic fetal monitoring for 15 minutes each hour
ANS: B
Maternal hypertension may reduce placental blood flow through vasospasm of the spiral
arteries. Reduced placental perfusion is best assessed with continuous electronic fetal
monitoring to identify patterns associated with this condition. It is not practical to provide
continuous auscultation with a fetoscope. This fetus needs continuous monitoring because it is
at high risk for complications
- Why is continuous electronic fetal monitoring generally used when oxytocin is administered?
a.
Fetal chemoreceptors are stimulated.
b.
The mother may become hypotensive.
c.
Maternal fluid volume deficit may occur.
d.
Uteroplacental exchange may be compromised.
ANS: D
The uterus may contract more firmly and the resting tone may be increased with oxytocin use.
This response reduces the entrance of freshly oxygenated maternal blood into the intervillous
spaces, depleting fetal oxygen reserves. Oxytocin affects the uterine muscles. Hypotension is
not a common side effect of oxytocin. All laboring women are at risk for fluid volume deficit;
oxytocin administration does not increase the risk.
- The nurse is concerned that a patient’s uterine activity is too intense and that her obesity is
preventing accurate assessment of the actual intrauterine pressure. Based on this information,
which action should the nurse take?
a.
Reposition the tocotransducer.
b.
Reposition the Doppler transducer.
c.
Obtain an order from the health care provider for a spiral electrode.
d.
Obtain an order from the health care provider for an intrauterine pressure catheter.
ANS: D
An intrauterine pressure catheter can measure actual intrauterine pressure. The tocotransducer
measures the uterine pressure externally; this would not be accurate with an obese patient,
even with repositioning. A Doppler auscultates the FHR. A scalp electrode (or spiral
electrode) measures the fetal heart rate (FHR).
- If the position of a fetus in a cephalic presentation is right occiput anterior, the nurse should
assess the fetal heart rate in which quadrant of the maternal abdomen?
a.
Right upper
b.
Left upper
c.
Right lower
d.
Left lower
ANS: C
the fetus is in a right occiput anterior position, the fetal spine will be on the mother’s right
side. The best location to hear the fetal heart rate is through the fetal shoulder, which would be
in the right lower quadrant. The right upper, left upper, and left lower areas are not the best
locations for assessing the fetal heart rate in this case
- In which situation would a baseline fetal heart rate of 160 to 170 bpm be considered a normal
finding?
a.
The fetus is at 30 weeks of gestation.
b.
The mother has a history of fast labors.
c.
The mother has been given an epidural block.
d.
The mother has mild preeclampsia but is not in labor.
ANS: A
The normal preterm fetus may have a baseline rate slightly higher than the term fetus because
of an immature parasympathetic nervous system that does not yet exert a slowing effect on the
fetal heart rate (FHR). Fast labors should not alter the FHR normally. Any change in the FHR
with an epidural is not considered an expected outcome. Preeclampsia should not cause a
normal elevation of the FHR.
- When the deceleration pattern of the fetal heart rate mirrors the uterine contraction, which
nursing action is indicated?
a.
Reposition the patient.
b.
Apply a fetal scalp electrode.
c.
Record this normal pattern.
d.
Administer oxygen by nasal cannula.
ANS: C
The periodic pattern described is early deceleration that is not associated with fetal
compromise and requires no intervention. This is a Category I tracing which is a normal
pattern. Repositioning the patient, applying a fetal scalp electrode, or administering oxygen
would be interventions performed for Category II or III patterns.
- When the mother’s membranes rupture during active labor, the fetal heart rate should be
observed for the occurrence of which periodic pattern?
a.
Early decelerations
b.
Variable decelerations
c.
Nonperiodic accelerations
d.
Increase in baseline variability
ANS: B
When the membranes rupture, amniotic fluid may carry the umbilical cord to a position where
it will be compressed between the maternal pelvis and the fetal presenting part, resulting in a
variable deceleration pattern. Early declarations are considered reassuring; they are not a
concern after rupture of membranes. Accelerations are considered reassuring; they are not a
concern after rupture of membranes. Increase in baseline variability is not an expected
occurrence after the rupture of membranes
The fetal heart rate baseline increases 20 bpm after vibroacoustic stimulation. The best
interpretation of this is that the fetus is showing
a.
a worsening hypoxia.
b.
progressive acidosis.
c.
an expected response.
d.
parasympathetic stimulation.
ANS: C
The fetus with adequate reserve for the stress of labor will usually respond to vibroacoustic
stimulation with a temporary increase in the fetal heart rate (FHR) baseline. An increase in the
FHR with stimulation does not indicate hypoxia. An increase in the FHR after stimulation is
an anticipated response and does not indicate acidosis. An increase in the FHR after
stimulation is a normal pattern, and does not indicate problems with the parasympathetic
nervous system. A Category I pattern is normal and strongly predictive of adequate fetal
acid-base status.
- When a Category II pattern of the fetal heart rate is noted and the patient is lying on her left
side, which nursing action is indicated?
a.
Lower the head of the bed.
b.
Place a wedge under the left hip.
c.
Change her position to the right side.
d.
Place the mother in Trendelenburg position.
ANS: C
A Category II pattern indicates an indeterminate fetal heart rate. Repositioning on the opposite
side may relieve compression on the umbilical cord and improve blood flow to the placenta.
Lowering the head of the bed would not be the first position change choice. The woman is
already on her left side, so a wedge on that side would not be an appropriate choice.
Repositioning to the opposite side is the first intervention. If unsuccessful with improving the
FHR pattern, further changes in position can be attempted; the Trendelenburg position might
be the choice.
- Which nursing action is correct when initiating electronic fetal monitoring?
a.
Lubricate the tocotransducer with an ultrasound gel.
b.
Securely apply the tocotransducer with a strap or belt
c.
Inform the patient that she should remain in the semi-Fowler position.
d.
Determine the position of the fetus before attaching the electrode to the maternal
abdomen.
ANS: B
The tocotransducer should fit snugly on the abdomen to monitor uterine activity accurately.
The tocotransducer does not need gel to operate appropriately. The patient should be
encouraged to move around during labor. The tocotransducer should be placed at the fundal
area of the uterus