Respiratory device

Details Respiratory device Respiratory device

1982-06-28

1987-09-15

Coven, Edward M.

Surgery

Truss

Pad

128727, A61B 508

Patent

active

046932569

ABSTRACT:
A spirometer is provided which has a cylinder with a piston slidable in the cylinder. A pair of orifices from the atmosphere to the opposite sides of the piston are provided, the resistance to air flow through them being in a predetermined ratio. A tube is provided for connecting the mouth of a patient to one side of the piston chamber for effecting movement of the piston during inhalation or exhalation. The cylinder is provided with indicia representing units of air volume inhaled or exhaled with the volume of the cylinder being substantially smaller than the volume of air indicated by the spirometer.

REFERENCES:
patent: 3367324 (1968-02-01), DeBono
patent: 3608546 (1971-09-01), Shinn
patent: 3635214 (1972-01-01), Rand et al.
patent: 3722506 (1973-03-01), McMillan
patent: 3735752 (1973-05-01), Rodder
patent: 3774595 (1973-07-01), Cook
patent: 3848583 (1974-11-01), Parr
patent: 3848584 (1974-11-01), Otsap
patent: 3848585 (1974-11-01), Otsap et al.
patent: 4025070 (1977-05-01), McGill et al.
patent: 4041935 (1977-08-01), Garbe
patent: 4221381 (1980-09-01), Ericson

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