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Farmacologie van de inhalatie-anesthetica

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Toxiciteit: sevoflurane<br />

• cytochroom P 450 2E1: hexafluoroisopropanol en inorganic<br />

fluori<strong>de</strong><br />

• cave enzyme-inductie: metabolisme x 3<br />

• 7% <strong>van</strong> <strong>de</strong> patiënten: F > 50 µM/L<br />

• maar P450 2E1 (CYP2E1) niet in nieren en al bij al korte perio<strong>de</strong><br />

<strong>van</strong> gestegen F spiegel na sevo<br />

• tubulaire toxiciteit twijfelachtig met gevoelige test: N-acetyl-Bglucosamidase<br />

(NAG) in urine<br />

Toxiciteit: sevoflurane<br />

• in contact met droge, warme (>50°C) CO2-absorber:<br />

compound A, B, C, D (olefins) especially with Baralyme and<br />

NaOH and KOH containing absorbent<br />

• compound A: renale tubulusnecrose (in rat but not in human<br />

but β-lyase nee<strong>de</strong>d in both to produce reactive thiadacyl<br />

intermediates)<br />

• toxische concentratie: 110 ppm<br />

• verse gasflow > 1 L noodzakelijk to prevent ?????

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