Fetal Heart Rate Interpretation, Intrauterine
Resuscitation, Documentation, and Clinical
Decision-Making | Updated Questions and
Answers
Which contraction characteristics can be assessed with a tocodynamometer?
a) Frequency
b) Duration
c) Intensity ---------CORRECT ANSWER-----------------a) Frequency
b) Duration
All Fetuses of mothers in labor experience an interruption of the oxygenation
pathway at which point? ---------CORRECT ANSWER-----------------Uterus
The FHR can be monitored using doppler ultrasound?
a) Throughout labor and delivery unless the use of a more accurate method is
clearly indicated
b) Internally
c) Only early in labor
d) The FHR cannot be monitored by doppler ultrasound ---------CORRECT ANSWER-
----------------a) Throughout labor and delivery unless the use of a more accurate
method is clearly indicated
,What is the normal range for FHR base line in a term infant?
a) 80-120 bpm
b) 110-160 bpm
c) 140-180bpm
d) it depends on the sex of the fetus ---------CORRECT ANSWER-----------------b) 110-
160 bpm
Trace the flow of oxygen from mother to fetus and back. ---------CORRECT
ANSWER-----------------Mother's inhalation to lungs to mat. circulatory system to
hemoglobin in RBC's to bloodstream in uterus. Uterus to spiral arteries to
placenta to intervillous space to travel via simple diffusion into the villi. The
capillaries to the umb. vein to the fetus.
The umb. artery sends waste (CO2) to the intervillous space to the mothers
venous system.
What factors impact maternal oxygen delivery? ---------CORRECT ANSWER-----------
------1. Mother (blood plasma, cardiac output, hemoglobin concentration & O2
saturation)
2. Placenta/intervillous space (uterine contractions & calcification's)
3. Fetus (vagal response aka decel or cord compression)
,By what % does maternal cardiac output increase above the non-pregnant state
and what position helps this uteroplacental blood flow? ---------CORRECT
ANSWER-----------------30-50%
lateral recumbent or semi-Fowler's
Define tachysystole contractions and the cause of. ---------CORRECT ANSWER-------
---------->5 contractions in 10 min (more frequently than Q 2 min) averaged over
30 min window.
Caused by oxytocin, aminoinfusion or in rare cases spontaneously.
List interventions for tachysystole contractions. ---------CORRECT ANSWER-----------
------Maintaining mat. volume, mat. positioning, intravenous hydration.
Decreasing mat. pain/anxiety.
1. Reposition pt to side.
2. Admin IV fluid bolus.
3. Admin 0.25mg terbutaline SQ.
4. Admin O2 10L via non rebreather face mask.
Describe passive diffusion as related to the maternal placental fetal system. --------
-CORRECT ANSWER-----------------higher conc. to lower concentration.
1.Oxygen from maternal (higher) to fetal compartment (lower) to fetal hgb then
transported to fetal tissue.
2. CO2 returns to intervillous space by passive diffusion and is removed by the
mat. venous system.
, Maternal hypotension is a potential side effect of regional anesthesia and
analgesia. What nursing interventions could you use to raise the client's blood
pressure? Choose all that apply.
A) Place the woman in a supine position.
B) Place the woman in a lateral position.
C) Increase intravenous (IV) fluids.
D) Continuous Fetal Monitor
E) Administer ephedrine per MD order ---------CORRECT ANSWER-----------------
Place her in lateral position, & increase IV fluids. If no improvement may need to
give epi to increase vascular tone.
Define maternal hypertension (gestational). ---------CORRECT ANSWER----------------
-systolic BP >= 140mm hg, a diastolic BP>= 90 mm hg or MAP of >=105
What is the normal expected value for a term fetal HGB? ---------CORRECT
ANSWER-----------------17g/dl, fetal hgb has a higher oxygen affinity than an adult
to develop in an oxygen poor environment. The fetal circulatory pattern ensures
blood with higher O2 and nutrition content is delivered to the vital organs (brain
and heart) to tolerate the stress of labor.
Detail the umbilical cord ---------CORRECT ANSWER-----------------1 vein, 2 arteries
encased in wharton's jelly.