Flashcards in Week 2 Anesthesia for Fetal Surgery (everything) Deck (69)
How does Cerebral cortical activity and hypothalamic activity affect the FHR?
through their effects on integrative centers in the medulla oblongata.
Tell me all four ways FHR is regulated.
(all four are listed separately in other slides, this is just bringing them all together in one condensed slide)
Parasympathetic outflow by means of the vagus nerve decreases the FHR
Sympathetic activity increases FHR and cardiac output
Baroreceptors respond to increased blood pressure and chemoreceptors respond to decreased PaO2 to modulate the FHR through the autonomic nervous system.
Cerebral cortical activity and hypothalamic activity affect the FHR through their effects on integrative centers in the medulla oblongata
Who has a lower FHR, term fetuses or preterm fetuses?
Term fetuses have lower baseline FHR.
What is the initial fetal response to acute hypoxemia?
What is baseline FHR defined as?
bradycardia is the initial fetal response to acute hypoxemia, but after prolonged hypoxemia the fetus may have what and why?
tachycardia as a result of catecholamine secretion and sympathetic nervous system activity.
What four features are assessed of a FHR?
Baseline, variability , accelerations, decelerations.
You can measure the FHR internally and externally, do both allow for continuous assessment?