Gases Flashcards
1
Q
what is heliox and how does it work
A
70% helium and 30% oxygen. Decreased gas density as compared to oxygen alone, increasing flow of gas through obstruction/stridor
gas becomes more turbulent when passages narrow
- diameter
- density
- velocity
2
Q
treatment of stridor
A
humidified oxygen heliox non-invasive PPV racemic epi steroids
3
Q
why cant nitrous be used >80%?
A
limits delivery of adequate O2
NO is VERY insoluble in blood -> nearly 99.9% eliminated as is
4
Q
what attenuates the baroreceptor reflex?
A
isoflurane
CCB
PDE-i
ACEi
(glossopharyngeal and vagus are afferent arms)
