Casing and spirometer for metered dose inhaler

Details Casing and spirometer for metered dose inhaler Casing and spirometer for metered dose inhaler

1995-11-06

1998-03-10

Lacyk, John P.

Surgery

Truss

Pad

604 45, 12820014, 12820126, 12820121, A61M 1500

Patent

active

057249865

ABSTRACT:
An apparatus for dispensing a metered amount of aerosolized medication and/or for measuring breathing function includes a casing that defines a cavity, a first or discharge opening from which a subject inhales from the cavity or exhales into the cavity, a second or air opening through which air enters the cavity, and a third opening in fluid communication with the cavity between the first and second openings. The casing also defines an open pocket for receiving a pressurized canister and a fourth or medication opening through which the contents of the canister discharge into the cavity of the casing. A pressure transducer in fluid communication with the third opening senses the pressure of breath moving through the cavity. Alternatively, a fan and photocell assembly may replace the pressure transducer and sense the flow of gas through the cavity.

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"How should a pressurized .beta.-adrenergic bronchodilator be inhaled", Eur J. Resp Dis, (1981) 62, 3-21.
"Introduction to Motorola Pressure Sensors," Motorola Sensor Device Data, pp. 1-4,1-5, 6-11 and 6-12.

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