Resistive element and calibrated air tube for spirometer

Details Resistive element and calibrated air tube for spirometer Resistive element and calibrated air tube for spirometer

A - Human Necessities

61

B

A61B 5/087 (2006.01) A61B 5/091 (2006.01) G01F 25/00 (2006.01) G01L 27/00 (2006.01)

Patent

CA 2257921

The present air tube, preferably calibrated air tube, includes resistive element (22) which is located in the hollow space of the tubular portion (12). This resistive element (22) is adapted for providing a linear resistance versus pressure response, and is sized and adapted to cause a pressure difference or differential as air flows in the hollow space across this element. The preferred calibrated air tube has a pressure response, is useful in a spirometer, and includes a tubular member. Calibration information is associated with the air tube to a model pressure response of a model air tube having substantially the same dimensions and configurations as the air tube.

Le tube d'air de la présente invention, de préférence un tube d'air étalonné, comporte un élément résistif (22) localisé dans l'espace creux de la partie tubulaire (12). L'élément résistif (22), conçu pour opposer une résistance linéaire à la réponse en pression, a des dimensions et une configuration lui permettant de provoquer une différence ou un différentiel de pression à mesure que l'air traverse l'espace creux. Le tube d'air étalonné préféré donne une réponse en pression, est utile dans un spiromètre et comporte un élément tubulaire. Des informations d'étalonnage associées au tube étalonnent la réponse en pression du tube d'air en fonction de la réponse en pression modèle d'un tube modèle ayant sensiblement les mêmes dimensions et la même configuration que ledit tube d'air.

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