Summary
The adsorption of halothane vapour on the ground-glass in all-glass syringes was studied. We devised a method to estimate adsorption by measuring changes of pressure in syringes filled with halothane vapour-air mixtures. The amount of adsorption of the halothane vapour by ground-glass was considerable, particularly at lower concentrations of the mixture. This factor significantly affects accuracy in the particular estimation of anaesthetic vapour-gas mixtures.
RéSumé
Nous avons étudié ľadsorption de vapeur ďhalothane sur la “base-verre” dans des seringues toutes de verre. Nous avons mis à point une méthode pour déterminer ľadsorption en mesurant les changements de pression dans des seringues remplies de mélanges de vapeur ďhalothane-air. La quantité ďadsorption de vapeur ďhalothane par la “base-verre” était considérable, particuliérement aux plus basses concentrations du mélange. Ce facteur modifie de façon significative la précision dans ľévaluation particuliére des mélanges vapeurs anesthésiques-gaz.
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References
Hebchl, R. The Preparation of Accurate Standard Mixtures of Inhalation Anaesthetic Agents. (To be published.)
Hill, D. W. Physics Applied to Anaesthesia. Brit. J. Anaes.38: 476 (1966).
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This work has been supported by a grant from The Canadian Foundation for the Advancement of Therapeutics.
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Herchl, R. Adsorption of halothane vapour in glass syringes. Canad. Anaes. Soc. J. 17, 630–634 (1970). https://doi.org/10.1007/BF03004723
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DOI: https://doi.org/10.1007/BF03004723