APEX exam 2 focused cards Flashcards
Faster induction:
___ Vaporizer setting
___FGF
___ Time constant of delivery*
___ Anatomical DS
___ RR
___ FRC
___ CO
___ Tissue blood solubility
___ Tissue blood flow*
___ Partial pressure of tissue:art*
___Partial pressure of alveoli gas*
Faster induction:
^ Vaporizer setting
^ FGF
Decrease :Time constant of delivery
Decrease: Anatomical DS
^ RR
Decrease: FRC
Decrease: CO
Decrease: Tissue blood solubility
Decrease: Tissue blood flow fat but increase for vessel-rich to brain
__??? Partial pressure of tissue:art
Decrease: Partial pressure of alveoli gas
Fastest onset of VA gas in order:
(5)
Most potent VA gas in order:
Most potent (Lower MAC)–> Least potent (higher MAC)
Hepatic VA metabolism:
Least –> Most
FA/FI in order highest to lowest:
Speed of onset
Nitrous > Des > Sevo >Iso> Halothane
Potency
Halothane> Iso> Sevo> Des> Nitrous
Hepatic metabolism:
Nitrous 0.004%, des 0.02%, iso 0.2%, sevo 2-5%, halothane 20%
FA/FI
Nitrous –> Des –> Sevo –> Iso –> Halo
2nd gas effect nitrous affects the most to least:
_____ > _____ >______
You know by comparing the blood gas solubility
Blood gas solubility
Iso (1.46) > Sevo (0.65) > Des (0.42)
How long to withhold nitrous for:
Before SF6 bubble:
After SF6 bubble:
Air:
Perfluoropropane:
Silicone oil:
Before SF6 bubble: 15 mins
After SF6 bubble: 7-10 days
Air: 5 days
Perfluoropropane: 30 days
Silicone oil: N2O Contraindicated
Potency of coronary artery vasodilation (greatest to least)
Do the 3 main gases
Iso > Des > Sevo
Most likely to inhib hypoxic drive to breath
MOST to least
Based on biotransmation
Halo > Sevo > Iso > Des
**DES = LEAST likely to impair hypoxic drive to breathe
Causes for Methmeoblobeinemia?
Benzocaine
Cetacaine
Prilocaine
EMLA
Nitroprusside
Nitroglycerine
Sulfonamides
Phenytoin
Mitral stenosis etiology
