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Broken O‐ring causing hypoventilation

Ohmeda would like to thank the Editor for the opportunity to comment on this article. The problem complained of was not reported to Ohmeda and we have not had the opportunity to inspect the broken O-ring and therefore cannot determine if it is of our supply. In these circumstances we are unable to make any comment as to any possible cause for the failure of this O-ring in this particular instance. However, we agree with the authors of the importance of checking that the O-rings are intact and not damaged prior to mounting a vaporizer. This instruction is already included in the Ohmeda Vaporiser Operation and Maintenance Manuals.