Catheters with fluorescent temperature sensors

A - Human Necessities – 61 – B

Patent

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A61B 5/00 (2006.01)

Patent

CA 2439271

A catheter with a fluorescent temperature sensor is shown and described. The catheter includes a lumen, a fiber-optic cable that extends through the lumen. A distal end of the fiber-optic cable is coated with a fluorescent material and a proximal end of the fiber-optic cable is connected to a console. The console includes a light source for transmitting light through the fiber-optic cable for exciting the fluorescent material. The console further includes a photo multiplier tube for converting light emitted by the excited fluorescent material to a plurality of analogue voltage signals. The console further includes a digital oscilloscope linked to the photo multiplier tube for converting the plurality of analogue voltage signals to at least one digital signal. The console further includes a processor linked to the digital oscilloscope for converting the at least one digital signal to a temperature value for the distal end of the fiber-optic cable.

L'invention concerne un cathéter équipé d'un capteur de température fluorescent. Le cathéter comprend une lumière, un câble fibre optique s'étendant à travers la lumière. Une extrémité distale du câble fibre optique est revêtue d'un matériau fluorescent et une extrémité proximale du câble fibre optique est reliée à une console. La console comprend une source lumineuse permettant d'émettre un rayonnement lumineux à travers le câble fibre optique, aux fins d'excitation du matériau fluorescent. La console comprend en outre un tube photomultiplicateur permettant de convertir un rayonnement lumineux émis par le matériau fluorescent excité en une pluralité de signaux de tension analogues. La console comprend en outre un oscilloscope numérique relié au tube photomultiplicateur, l'oscilloscope permettant de convertir la pluralité de signaux de tension analogues en au moins un signal numérique. La console comprend en outre un processeur relié à l'oscilloscope numérique permettant de convertir le signal numérique à une valeur de température destinée à l'extrémité distale du câble fibre optique.

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