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26 Cards in this Set
- Front
- Back
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Anesthesia goal
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To make insensible or without feeling
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Four stages of anesthesia
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Stage I - Stage of voluntary movement
Stage II - Stage of delierium or involuntary movement Stage III - surgical anesthesia Stage IV - CNS extremely depressed and respiration ceases |
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Common molecule of inhalant anesthesia
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Fluorine
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Stage 1 of anesthesia
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voluntary movement, drug admin to loss of consciousness
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Stage 2 of anesthesia
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stage of delirium/involuntary movement, loss of voluntary control (excitement stage)
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Stage 3 of anesthesia
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surgical anesthesia, unconsciousness w/progressive depression of reflexes.
Has different planes, want to stay b/w planes 2 - 3 for most surgeries |
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Stage 4 of anesthesia
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CNS extermely depressed and respiration ceases
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Surgical anesthesia stage
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Stage III
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Blood/gas coefficient
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anesthetic likes being in the blood, diffuses to brain slower
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A low blood/gas coefficient means
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will diffuse to the brain faster
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Increase cardiac output has what effect on anesthesia
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decreases conduction. Blood moving too fast to diffuse
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What value of BG coefficient diffuses faster
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1
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MAC
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minimum aveolar concentration
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Potency of anesthesia is
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1/MAC
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Drugs with _______ MAC are more potent
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low MAC
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Isofluorane has lower MAC than Sevo so it is _____ potent
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more potent
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Iso induction is ______ even though it is more potent, because
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slower
increased BG PC. |
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Difference between Sevo and Iso effects
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Sevo produces Compound A - nephrotoxic
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The rise in alveolar concentration toward inspired concentration is
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most rapid with least solubel anesthetic
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Sevo has lower BG PC is it
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reaches equilibrium/brain faster
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A drug with low BG PC is associated with
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more rapid anesthetic induction and more rapid elimination of anesthetic and recovery
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Minimum alveolar concentration =
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ED50
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Drugs with a low MAC are ______ potent than drugs with a high MAC
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potent
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Iso has a ______ MAC than sevo, therfore iso is ______ potent
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lower
more |
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Inhalant anesthetics work by
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inhibition of NMDA receptors
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Inhalant CNS effects
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reversible CNS depression
Absence of awareness No recall of events at conscious level (amnesia) Analgesia Muscle relaxation decreased motor response to noxious stimuli |
