Endotracheal tube using leak hole to lower dead space
CA 2463538 A1 · Owner: The Government Of The United States Of America As Represented By The Sec Retary Of The Department Of Health And Human Services · Inventors: Kolobow, Theodor
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tracheal tube ventilation apparatus (10) to more effectively remove expired gases. In one embodiment, one or more leak holes (40) are created in the side walls of an endotracheal tube (12) so that expired gases can leak out of the endotracheal tube (12) above the larynx. Each leak hole (40) might have a diameter between 0.5 and 4.0 mm. In another embodiment a tube (12) is , attached to a proportionately larger leak hole (40) so that the expired gases can be directed away from the leak hole to a specific location. In the case of mechanically controlled ventilation, a positive end expiratory pressure can be applied to this tube (12) to mechanically assist with the process of …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed September 16, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 16, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 16, 2024.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.