NCC EFM EXAM QUESTIONS AND VERIFIED ANSWERS
Ductus venosus connects ______ to ______?
Umb. vein to IVC
Foramen ovale connects _______to______?
R. atrium to L. atrium
Ductus arteriosus connects _______ to _______?
Pulm. artery to aorta
Normal rate
110 to 160 BPM
Average baseline rate at 15wks gestation
160 BPM
Average rate in fetus with heart block
60 BPM (intrinsic ventricular or nodal rate)
Sympathetic effects
Incr. HR, constricted peripheral and visceral blood vessels, vital organs dilate and
receive more blood
Gest. age at which autonomic nervous system is fully developed
~ 32wks
Primary indicator of fetal oxygenation
Presence or absence of variability
Location of chemoreceptors
aortic arch
Chemoreceptors respond to?
Changes in O2 and CO2
Location of baroreceptors
Aortic arch and carotid bodies
Maximal reactivity occurs when?
Late at night
Max duration of fetal nonreactivity?
80min
Sensitivity
Ductus venosus connects ______ to ______?
Umb. vein to IVC
Foramen ovale connects _______to______?
R. atrium to L. atrium
Ductus arteriosus connects _______ to _______?
Pulm. artery to aorta
Normal rate
110 to 160 BPM
Average baseline rate at 15wks gestation
160 BPM
Average rate in fetus with heart block
60 BPM (intrinsic ventricular or nodal rate)
Sympathetic effects
Incr. HR, constricted peripheral and visceral blood vessels, vital organs dilate and
receive more blood
Gest. age at which autonomic nervous system is fully developed
~ 32wks
Primary indicator of fetal oxygenation
Presence or absence of variability
Location of chemoreceptors
aortic arch
Chemoreceptors respond to?
Changes in O2 and CO2
Location of baroreceptors
Aortic arch and carotid bodies
Maximal reactivity occurs when?
Late at night
Max duration of fetal nonreactivity?
80min
Sensitivity
