Sheathed probes for tissue type recognition

A - Human Necessities – 61 – B

Patent

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

Patent

CA 2284150

The invention incorporates electrodes (3) in the tip of the sheath cover (1) for a diagnostic probe that makes both electric and optical measurements of tissue contacted by the sheath. The electrodes are positioned relative to the optical window (2) in such a way as to ensure that sealing is not compromised by the presence of the electrodes. The electrodes are close by to ensure that both the optical and electrical measurements are made on the same area of tissue. The invention uses the hoop tension in the sheath to apply the needed spring force to the electrode contact. In addition the invention provides a piece of turbid material such as a polymer of controlled composition as a built-in calibrator attached to the outside of the tip of the sheath.

L'invention concerne des électrodes (3), situées à l'extrémité de la gaine de protection (1) d'une sonde diagnostique, qui effectue à la fois des mesures électriques et optiques d'un tissu mis en contact avec ladite gaine. Ces électrodes sont placées par rapport à la fenêtre optique (2), de manière à ne pas compromettre l'étanchéité de la gaine. Ces électrodes sont proches de ladite fenêtre optique, afin d'assurer que les mesures électriques et optiques puissent s'effectuer sur une même zone de tissu. Cette invention utilise la tension périphérique de la gaine pour appliquer la force élastique nécessaire au contact entre électrodes. Cette invention concerne en outre un bloc de matière trouble, par exemple un polymère de composition contrôlée, en tant qu'organe de calibrage incorporé, fixé à l'extérieur de l'extrémité de ladite gaine.

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