Device and method for measuring lung performance

A - Human Necessities – 61 – B

Patent

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Details

A61B 5/08 (2006.01) A61B 5/087 (2006.01)

Patent

CA 2405702

The flow measurement device of the present invention incorporatesnumerous novel features. The device includes a displacement measuring device (160) to measure the position of a movable plate member (132), a self-oscillation dampener (140) to dampen oscillations of the plate member (132), one or more stiffening members engaging or incorporated into the plate member (132) to increase the resonant frequency of the plate member (132) and reduce flutter, and a conduit (124) providing for differing directions (148, 164) of air flow at different points along its length to eliminate the effects of gravity on flow measurements.

L'appareil de mesure du débit selon la présente invention comporte plusieurs caractéristiques nouvelles. Par exemple, le dispositif comprend un dispositif de mesure du déplacement qui mesure la position d'un élément de plaque mobile, un amortisseur auto-oscillant qui réduit les oscillations de l'élément de plaque, un ou plusieurs éléments raidisseurs qui sont en contact avec l'élément de plaque ou qui sont intégrés dans ce dernier pour augmenter la fréquence de résonance de l'élément de plaque et réduire le flottement, et un conduit qui dirige l'écoulement d'air dans des directions différentes à des endroits différents sur sa longueur afin d'éliminer les effets de la gravité sur les mesures du débit.

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