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What does a late deceleration indicate?
Possible uteroplacental insufficiency or decreased blood flow through the intervillous spaces of the uterus during contractions
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If using oxytocin, and you detect a late deceleration, what should you do?
stop or slow the rate of administration, change the womans position from supine to lateral (to relieve pressure on the vena cava and supply more blood to the uterus and fetus)
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What are the patters of variable decelerations that refere to decelerations that occur at unpredicable times in relation to contractions?
Variable decelerations
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Where are the uterine contractions found on the printed out paper rolls of an oscilloscope?
On the bottom half
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Where is the FHR found on the paper of the oscilloscope readout?
On the top half
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When is MARKED bradycardia noted?
less than 100 bpm
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What is marked bradycardia an possible sign of?
hypoxia
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MARKED fetal tachycardia is noted at a rate greater than, what?
180
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What is marked tachycardia caused by?
Caused by hypoxia, maternal fever, drugs, fetal arrhythmia, or maternal anemia or hyperthyroidism
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Temporary, nonperidoic accelerations are normal and are caused from what?
fetal movement, a change in maternal position, or adm of an analgesic
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These are normal periodic decreases in FHR resulting from pressure on the fetal head during contractions
Early Decelerations
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When are early decelerations suppose to occur?
Late in labor
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If early decelerations occur early in labor, before the head has fully decended, what could this indicate?
Fetal head compression possibly caused by cephalopelvic disproportion
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When do late decelerations occur?
30-40 seconds after the onset of a contraction and continuing beyond the end of a contraction
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How long do Prolonged decelerations last and what might they indicate?
2-3 mintues but less than 10- may indicate cord compression or maternal hypotension
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What might Variable decelerations indicate?
cord compression
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What is the first thing you should do if you notice variable decelerations?
Change the womans position from supine to lateral or to a Trendelenburg postion to relieve pressure on the cord. Adm fluids and oxygen. If not relieved by these measures, then amnioinfusion may be prescribed to lift uterine wall away from cord
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