Surgery – Respiratory method or device – Means for mixing treating agent with respiratory gas
Patent
1998-01-14
2000-08-29
Lewis, Aaron J.
Surgery
Respiratory method or device
Means for mixing treating agent with respiratory gas
12820023, A61M 1500
Patent
active
061092614
ABSTRACT:
There is provided a device for the administration of an inhalation medicament, including a body defining a through-going air pathway having a longitudinal axis, an air inlet, an air outlet forming a mouthpiece, means for dispensing medicament into the pathway and air flow regulating means, characterized in that the air flow regulating means includes a movable obstructing means adapted to reduce the cross-sectional area of the pathway at a location between the air inlet and the means for dispensing medicament, and biassing means, whereby the obstructing means is biassed into a first resting position in which the cross-sectional area of the pathway is minimum and is adapted to move against the bias of the biassing means to a second position in which the cross-section area of the pathway is maximum in response to a pressure fall at the mouthpiece caused by inhalation and is adapted to move farther to a third position in which the cross-sectional area of the pathway is less than maximum in response to a greater pressure fall at the mouthpiece caused by inhalation.
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Clarke Alastair Robert
Shepherd Michael Trevor
Sleath Clive
Fisons plc
Lewis Aaron J.
Mitchell Teena
Newman Irving
Oehler Ross J.
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