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35 Cards in this Set
- Front
- Back
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name 3 factors that affect anesthetic uptake?
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solubility, alveolar blood flow, and the difference in partial pressure between alveolar gas and venous blood
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Will low CO predispose the patient to over or under dosing of VAA?
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overdosing
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How can you prevent diffusion hypoxia of N20?
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100% O2 for 5-10 minutes after it's discontinuation
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What are the MAC's of Sevo, Des, Iso, and N20?
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2, 6, 1.15, 105
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How much does the MAC of a VAA decrease per decade of age?
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6% MM 164
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What effect do VAA's have on the RR and TV?
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Increased rate and decreased TV
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Does N20 have muscle relaxant properties?
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No
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What effect does N20 have on the kidneys?
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Dec RBF, GFR, and UO
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What effect does N20 have on the brain?
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Inc CBF,CBV, ICP, CMR02
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How many more times is N20 more soluble than nitrogen in te blood? and why is that important?
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35, thus it diffuses into air containing cavities more rapidly.
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Contraindications to N20?
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air embolism, pneumothorax, acute intestinal obstruction, pneumocephalus, intraocular air bubbles, pulmonary hypertension
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65% N20 decreases the MAC of other VAA by how much?
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50%
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Rapid increases in ISO and Des concentrations will lead to increases in what? Which has the greater effect?
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transient increases in HR, BP, and plasma levels of norepi. Des has a worse effect
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Which VAA is known for coronary steal? and what is that?
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Iso. Dilation of normal coronary arteries drives blood away from fixed stenonic lesions
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at what MAC does iso procduce an isoelectric EEG?
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>2 MAC
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What effect do ISO, SEVO, and Des have on the brain?
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Inc CBF and ICP, dec CMRO2 and dec seizure activity
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which VAA except N20 has the least effect on SVR and BP
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Sevo
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which VAA except N20 has the greatest depressant effect on the kidneys?
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Iso
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which VAA has the greatest rate fo metabolism? and what is it?
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Sevo 2%
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what effect do VAA have on the liver?
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all decrease blood flow equally
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which VAA increases the HR the most?
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Iso
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which VAA has the lowest Blood Gas?
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Des... 0.42
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what effect do VAA have on the response to increasing CO2?
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depression
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which VAA degraded in CO2 absorbant to CO the most?
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Des. Discarding dried absorbant or the se of calcium hydroxide can minimize the chance of CO poisoning
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which VAA has been associated with delirium in pedi patients?
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Des
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what is the BG coefficient of sevo?
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0.69
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what makes sevo a good choice for inhalation induction?
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nonpungency and rapid increases in alveolar anesthetic concentrations
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how is sevoflurance metabolized?
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CP-450
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what does sevo degrade to in CO2 absorbers?
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compound A
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what FGF should you use when using sevo?
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> or = to 2
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what is the BG coefficient of Iso?
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1.43
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What is the VP of sevo?
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160
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what is the VP of Iso?
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243
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what is the VP of des?
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660
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Name some factors that speed induction?
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elimination of rebreathing, high FGF, low circuit volumes, low absorption by the anesthetic circuit, decreased solubility, high cerebral blood flow, and increased ventilation
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