Advanced Fetal Monitoring With 100%
Q&A…..
Cat 1 - CORRECT ANSWER--What category rules out fetal acidemia?
Severe astha, cardiac issues, and ecclampic seizures - CORRECT ANSWER--What
maternal conditions greatly impact fetal oxygenation?
intervillous space - CORRECT ANSWER--Where does the exchange of O2 and
nutrients take place?
O2 enters the intervillous space via the maternal arteries, to the villi then the
umbilical vein take the o2 blood to the fetus. The umbilical arteries take the deO2
blood from the baby through the villi and back to the mother - CORRECT ANSWER--
How is o2 blood transferred to the fetus?
High to low concentration
Mom to fetus for O2
Low to high concentration for CO2 so baby to mom - CORRECT ANSWER--
Diffusion
Diffusion - CORRECT ANSWER--How is O2 transferred from mom to baby
Carry O2 into intervillous space
Are maximally dilated so they can not be increased - CORRECT ANSWER--Explain
spiral arteries in placenta
Maternal conditions like pre-e and cardiac disease
Maternal hypotension
Placental changes- abruptions, infections, edema, or smaller size
Excessive uterine activity
Vasoconstriction - CORRECT ANSWER--What are factors that can decrease
uteroplacental blood flow?
They are constricted which decreases blood flow - CORRECT ANSWER--What
happens to the spiral arteries during pre-e?
The aorta and vena cava get compressed (20 weeks) - CORRECT ANSWER--Why
does the supine position cause decreased uteroplactenal blood flow?
Blocks the sympathetic pathway
Pooling of blood in the lower extremities decreases blood flow back to moms heart
which decreases blood flow to the fetus - CORRECT ANSWER--Why does maternal
hypotension happen after regional analgesia?
60% - CORRECT ANSWER--What percentage is uteroplacental blood flow
decreased by during cxts?
, Environment to lungs to heart to vasculature to uterus to placenta to umbilical cord -
CORRECT ANSWER--Explain the pathway for maternal- fetal exchange for fetal
oxygenation (basic)
Limbs, kidneys, and descending aorta - CORRECT ANSWER--Where is the least O2
blood in the fetus?
Umbilical vein and ductous venous - CORRECT ANSWER--Where is the most O2
blood in the fetus?
Ductus venosus - CORRECT ANSWER--Connects the umbilical vein to the inferior
vena cava, bypassing the liver
Shunt that allows most O2 blood to fetal heart
ductus venosus, foramen ovale, ductus arteriosus - CORRECT ANSWER--3
important shunts in fetal circulation
Foramen Ovale - CORRECT ANSWER--connects the two atria in the fetal heart
Allows O2 blood to flow through the heart and directly to the brain
Ductus Arteriosus - CORRECT ANSWER--a blood vessel in a fetus that bypasses
pulmonary circulation by connecting the pulmonary artery directly to the ascending
aorta
80-100 mL/kg - CORRECT ANSWER--What is a normal blood volume for a fetus at
term?
Increased heart rate - CORRECT ANSWER--What happens if you stimulate the
sympathetic nervous system?
Regulates the sympathetic - CORRECT ANSWER--What does the parasympathetic
nervous system do?
Increased heart rate - CORRECT ANSWER--What happens when catecholamines
(sympathetic) get released?
The sympathetic develops first so there is no parasympathetic to regulate the heart
rate - CORRECT ANSWER--Why do pre-termers have increased heart rates?
Acetylcholine is released which decreases the intrinsic heart rate
Vagus stimulation - CORRECT ANSWER--What happens when the parasympathetic
nervous system is stimulated?
Protect
Regulates BP - CORRECT ANSWER--What do baroreceptors do?
Decreased FHR, BP and CO - CORRECT ANSWER--What effect do baroreceptors
have on the fetus?
Q&A…..
Cat 1 - CORRECT ANSWER--What category rules out fetal acidemia?
Severe astha, cardiac issues, and ecclampic seizures - CORRECT ANSWER--What
maternal conditions greatly impact fetal oxygenation?
intervillous space - CORRECT ANSWER--Where does the exchange of O2 and
nutrients take place?
O2 enters the intervillous space via the maternal arteries, to the villi then the
umbilical vein take the o2 blood to the fetus. The umbilical arteries take the deO2
blood from the baby through the villi and back to the mother - CORRECT ANSWER--
How is o2 blood transferred to the fetus?
High to low concentration
Mom to fetus for O2
Low to high concentration for CO2 so baby to mom - CORRECT ANSWER--
Diffusion
Diffusion - CORRECT ANSWER--How is O2 transferred from mom to baby
Carry O2 into intervillous space
Are maximally dilated so they can not be increased - CORRECT ANSWER--Explain
spiral arteries in placenta
Maternal conditions like pre-e and cardiac disease
Maternal hypotension
Placental changes- abruptions, infections, edema, or smaller size
Excessive uterine activity
Vasoconstriction - CORRECT ANSWER--What are factors that can decrease
uteroplacental blood flow?
They are constricted which decreases blood flow - CORRECT ANSWER--What
happens to the spiral arteries during pre-e?
The aorta and vena cava get compressed (20 weeks) - CORRECT ANSWER--Why
does the supine position cause decreased uteroplactenal blood flow?
Blocks the sympathetic pathway
Pooling of blood in the lower extremities decreases blood flow back to moms heart
which decreases blood flow to the fetus - CORRECT ANSWER--Why does maternal
hypotension happen after regional analgesia?
60% - CORRECT ANSWER--What percentage is uteroplacental blood flow
decreased by during cxts?
, Environment to lungs to heart to vasculature to uterus to placenta to umbilical cord -
CORRECT ANSWER--Explain the pathway for maternal- fetal exchange for fetal
oxygenation (basic)
Limbs, kidneys, and descending aorta - CORRECT ANSWER--Where is the least O2
blood in the fetus?
Umbilical vein and ductous venous - CORRECT ANSWER--Where is the most O2
blood in the fetus?
Ductus venosus - CORRECT ANSWER--Connects the umbilical vein to the inferior
vena cava, bypassing the liver
Shunt that allows most O2 blood to fetal heart
ductus venosus, foramen ovale, ductus arteriosus - CORRECT ANSWER--3
important shunts in fetal circulation
Foramen Ovale - CORRECT ANSWER--connects the two atria in the fetal heart
Allows O2 blood to flow through the heart and directly to the brain
Ductus Arteriosus - CORRECT ANSWER--a blood vessel in a fetus that bypasses
pulmonary circulation by connecting the pulmonary artery directly to the ascending
aorta
80-100 mL/kg - CORRECT ANSWER--What is a normal blood volume for a fetus at
term?
Increased heart rate - CORRECT ANSWER--What happens if you stimulate the
sympathetic nervous system?
Regulates the sympathetic - CORRECT ANSWER--What does the parasympathetic
nervous system do?
Increased heart rate - CORRECT ANSWER--What happens when catecholamines
(sympathetic) get released?
The sympathetic develops first so there is no parasympathetic to regulate the heart
rate - CORRECT ANSWER--Why do pre-termers have increased heart rates?
Acetylcholine is released which decreases the intrinsic heart rate
Vagus stimulation - CORRECT ANSWER--What happens when the parasympathetic
nervous system is stimulated?
Protect
Regulates BP - CORRECT ANSWER--What do baroreceptors do?
Decreased FHR, BP and CO - CORRECT ANSWER--What effect do baroreceptors
have on the fetus?
