Metered dose inhaler spacer device and associated cleaning brush

Details Metered dose inhaler spacer device and associated cleaning brush Metered dose inhaler spacer device and associated cleaning brush

1992-04-20

1993-04-20

Burr, Edgar S.

Surgery

Liquid medicament atomizer or sprayer

Pre-pressurized container holding medicament

12820312, A61M 1100, A61M 1500, A61M 1610

Patent

active

052033236

ABSTRACT:
A tubular expansion chamber with ends each having apertures for inlet and outlet, respectively, for use with a conventional metered-dose inhaler for delivering medicament to a user suffering from asthma or other similar respiratory ailment. The expansion chamber with a metered-dose inhaler inserted in the inlet aperture intercepts the high-velocity discharge of medicament from a pressurized inhaler and produces a concentrated mist for withdrawal by inhalation by the user through the outlet aperture. The expansion chamber is closed on its outlet end by a removable end cap with mouthpiece surrounding and defining the outlet aperture. The constant volume expansion chamber is dimensionally optimized to maximize medicament concentration in a mist of small particles, able to be substantially withdrawn by a asthmatic user in a short, quick breath characteristic of persons with respiratory ailments such as asthma or chronic bronchitis. The dimensional parameters of the chamber are maximized to produce a maximum concentration of medicament mist while neutralizing the high velocity of the inhaler discharge. The expansion chamber is reusable indefinitely in part because it is cleaned after first removing the end cap by a provided brush designed to match the internal dimensions of the chamber and apertures.

REFERENCES:
patent: 4470412 (1984-09-01), Nowacki et al.
patent: 4953545 (1990-09-01), McCarty

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