Medical sensor with amplitude independent output

A - Human Necessities – 61 – B

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A61B 6/00 (2006.01) A61B 5/00 (2006.01) G08C 19/00 (2006.01)

Patent

CA 2179023

The present invention provides a medical sensor for detecting a blood characteristic. The sensor includes a transducer for producing an analog signal related to the blood characteristic. The analog signal is converted into a transmission signal which is in amplitude-independent form for transmission to a remote analyzer. In one embodiment, a current-to-frequency converter converts a signal from a pulse oximeter sensor into a frequency signal which can be transmitted over a transmission line to a remote pulse oximeter.

Cette invention a pour objet une sonde médicale permettant de détecter une caractéristique sanguine. Cette sonde comprend un transducteur qui produit un signal analogique lié à la caractéristique sanguine. Ledit signal analogique est transformé en signal de transmission qui se présente sous une forme indépendante de l'amplitude pour être envoyé à un analyseur éloigné. Dans une forme de réalisation, un convertisseur courant-fréquence transforme un signal provenant d'une sonde d'oxymètre par impulsions sous forme d'un signal de fréquence qui peut être envoyé sur une ligne de transmission à un oxymètre par impulsions éloigné.

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