EFM QUESTIONS AND ANSWERS

what is a normal fetal heart rate - Answer- 110 to 160 how do you determine the base line fhr on a strip - Answer- - the mean fhr rounded to increments of 5 bpm -during a ten minute period -exclude all decels, accels and marked variability -need 2 min of definition base or use previous 10 min define bradycardia as related to a fetal heart rate - Answer- 110 what can bradycardia suggest - Answer- hypoxia define hypoxia - Answer- an o2 deficiency in body tissues define tachycardia as it relates to fetal heart rate - Answer- 160 what can cause tachycardia - Answer- -hypoxia -maternal fever -infection (fetus or mom) what is the most sensative predictor of o2 status in the fetus - Answer- variability what specific system in the fetus does variability show the status of - Answer- -o2 status of the autonomic nervous system (part of the cns) what factors influence variability - Answer- -decrease o2 in the fetal cns -narcotics -prematurity -fetal sleep -abnormalitys in the fetal cns, heart or both define variability - Answer- -fluctuations in the baseline fhr -these are irregular in amplitude and frequency -measured from peak to trough in bpm -determined in a 10 min window -excludes accels and decels a sleeping fetus may show what when variabilty is assessed on the strip - Answer- decreased variability lasting approximately 30 min how is variability classified - Answer- -absent -minimal -moderate -marked