Apparatus and method to determine blood parameters

G - Physics – 01 – N

Patent

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Details

G01N 33/48 (2006.01) A61B 5/00 (2006.01)

Patent

CA 2346074

The present invention relates to an apparatus for monitoring blood parameters during cardio-pulmonary bypass surgery or during other procedures which utilize an extracorporeal circuit. The apparatus has a light source (16) which transmits light at a plurality of wavelengths to the conduit. The reflected or transmitted light is received by a near sensor (18) and far sensor (20) from near optical fiber (17) and far optical fiber (19). The near and far sensors generate signals indicative of the intensity of light at a plurality of wavelengths. An arithmetic circuit (25) receives the signals from the near sensor (18) and far sensor (20) and calculates at least one parameter of blood. The apparatus provides real-time results to show immediate changes in the monitored parameters.

L'invention concerne un appareil permettant de contrôler des paramètres sanguins pendant une chirurgie de pontage cardio-pulmonaire ou au cours d'autres procédures qui font appel à un circuit extracorporel. Cet appareil comprend une source lumineuse (16) qui transmet la lumière à différentes longueurs d'onde au conduit. La lumière réfléchie ou transmise est reçue par un capteur proche (18) ou un capteur éloigné (20) à partir de la fibre optique proche (17) et de la fibre optique éloignée (19). Les capteurs proche et éloigné génèrent des signaux indiquant l'intensité de la lumière à plusieurs longueurs d'ondes. Un circuit arithmétique (25) reçoit les signaux émis par le capteur proche (18) et le capteur éloigné (20) et calcule au moins un paramètre du sang. L'appareil selon l'invention fournit des résultats en temps réel pour montrer les changements immédiats dans les paramètres contrôlés.

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