Tracheal intubation cannula with external valve

Details Tracheal intubation cannula with external valve Tracheal intubation cannula with external valve

1987-07-20

1989-03-07

Coven, Edward M.

Surgery

Respiratory method or device

Respiratory gas supply means enters mouth or tracheotomy...

623 9, A61M 1600

Patent

active

048096938

ABSTRACT:
This invention relates to a cannula for tracheal intubation, inserted through the hole made in the trachea of the patient. The cannula is fitted at the top with a mechanically operated valve which remains open during normal breathing but which can close and consequently interrupt the flow of air to the outside when the patient, in order to direct the air towards the vocal cords, breathes out with greater force, sufficient to overcome the resistance of the spring within the valve.

REFERENCES:
patent: 1615718 (1987-01-01), Olgard
patent: 2039142 (1936-04-01), Brehm
patent: 2804076 (1957-08-01), Girandon
patent: 3370305 (1968-02-01), Gooh et al.
patent: 3606669 (1971-09-01), Kemble
patent: 3683931 (1972-08-01), Chelucci et al.
patent: 3952335 (1976-04-01), Sorce et al.
patent: 4040428 (1977-08-01), Clifford
patent: 4203150 (1980-10-01), Scaramucci
patent: 4315555 (1982-02-01), Crandall et al.
patent: 4325366 (1982-04-01), Tabor
patent: 4538607 (1985-09-01), Saul

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