Carbon dioxide absorbent in anaesthesiology

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252/18, 137/1.52

B01J 20/04 (2006.01) A61M 16/22 (2006.01)

Patent

CA 2272933

The invention concerns a carbon dioxide absorbent for use in anaesthesiol-ogy, in which the absorbent comprises at least one pharmaceutically acceptable hy-droxide essentially free of sodium and/or potassium hydroxide and a carbon dioxide absorbingly effective amount of a com-patible humectant. Calcium hydroxide is the preferred hydroxide. The humectant may be of inorganic or organic origin. The carbon dioxide absorbent of the in-vention may, additionally, include an ef-fective amount of a setting agent, prefer-ably calcium sulphate hemihydrate and/or a compatible agent for internal genera-tion of hydrogen, preferably aluminium metal powder. The carbon dioxide ab-sorbent of the invention is chemically inert to sevoflurane, as well as to the anaesthet-ics enflurane, isoflurane and desflurane.

L'invention porte sur un absorbant de dioxyde de carbone pouvant être utilisé en anesthésiologie et comprenant au moins un hydroxyde pharmaceutiquement acceptable et sensiblement dépourvu de sodium et/ou d'hydroxyde de potassium, et une quantité d'un humectant compatible pouvant absorber efficacement le dioxyde de carbone. L'hydroxyde préféré est l'hydroxyde de calcium. L'humectant peut être d'origine inorganique ou organique. L'absorbant de dioxyde de carbone selon la présente invention peut en outre comprendre une quantité effective d'un agent de fixage, de préférence un sulfate de calcium hémihydraté et/ou un agent compatible favorisant l'émission interne d'hydrogène, de préférence des poudres métalliques d'aluminium. L'absorbant de dioxyde de carbone selon la présente invention est chimiquement inerte au sevoflurane, ainsi qu'aux produits anesthésiques que sont l'enflurane, l'isoflurane et le desflurane.

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