Intravenous set flow volumetric measurement device

A - Human Necessities – 61 – M

Patent

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A61M 5/168 (2006.01)

Patent

CA 2459871

A method and device for volumetric measurement of a drop of fluid administered in a gravity intravenous set (12). Radiation (26), preferably infrared light is passed through from the exterior of the drip chamber (14) of the intravenous set and is detected and quantified by a receiver (32) on the other exterior side of the chamber. The radiation passing through the chamber when a drop is not passing through the radiation path is taken as the background radiation level. When a drop passes through the chamber a loss in radiation passing through to the receiver occurs. This relative loss is converted into a volume with the aid of a lookup table.

L'invention concerne un procédé et un dispositif de mesure volumétrique d'une goutte de fluide administrée à l'aide d'un ensemble de perfusion intraveineuse par gravité (12). Un rayonnement (26), de préférence infrarouge, est passé, depuis l'extérieur, à travers la chambre compte-gouttes (14) de l'ensemble de perfusion intraveineuse, puis il est détecté et quantifié au moyen d'un récepteur (32) disposé de l'autre côté, à l'extérieur de la chambre. On utilise comme niveau de bruit de fond le rayonnement passant à travers la chambre lorsqu'aucune goutte ne tombe. Lorsqu'une goutte passe à travers la chambre le rayonnement passant dans la chambre et recueilli au détecteur subit une perte. Cette perte relative est transformée en volume à l'aide d'une table de valeurs.

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