NCC EFM CERTIFICATION Revised Quiz Test Bank ch 007 Complete Solution 2023 GRADED

EFM paper speed correct answers 3cm/ minute Ultra sound (EFM) correct answers US transducer detects motion through ultrahigh frequency sound waves - it determines FHR by auto correlation compares successive reflected ultra sound waveforms at many points FSE correct answers fetal scalp electrode (ISE) measures interval between R waves Value of EFM correct answers used as a screen test, not considered diagnostic - normal EFM tracing = grater than 99% chance fetus with not have neurologic injury Normal FHR pattern detects what? correct answers Intact CNS, oxygenation of the brainstem, ANS and intact heart sympathetic nervous system correct answers FHR regulation, develops 1st in the fetus. Release of norepinephrine/ epinephrine = increase in FHR parasympathetic nervous system correct answers FHR regulation Release acetylcholine = a decrease in FHR (vagal) *** responsible for producing variability as the fetus matures - variability requires a mature neuro system Baroreceptors correct answers stretch receptors - respond to changes in BP = -Abrupt decrease in FHR -abrupt decrease in CO2 -abrupt decrease in BP ** variable decelerations w/ moderate variability are baroreceptor influenced Chemoreceptors correct answers Respond to changes in o2,co2, and pH levels When blood flow is below threshold for normal respiratory gas exchange, increase in PCO2 stimulates Chemoreceptors to slow FHR increase in PCO2, Decrease in O2, decrease in pH = vagal response (decrease in HR in response to hypoxemia) category 1 tracing correct answers Normal - strongly predictive of normal acid base status at the time of observation - baseline 110-106 -moderate variability - absence of late decelerations - absence of variable decelerations - early decelerations can be present