Light generating device that self centers within a lumen to...

A - Human Necessities – 61 – N

Patent

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A61N 5/067 (2006.01)

Patent

CA 2531532

A light generating device (1) for illuminating tissue adjacent to a body lumen while a distal end (5) of the device is centered in the lumen, to render photodynamic therapy. The device can either occlude or displace bodily fluid, both without the use of a balloon. In one embodiment, a flushing lumen (4B) has a port adjacent to an array of light sources(10) , to displace bodily fluid that might otherwise absorb light. Another embodiment employs a centering (45) member that moves between a first position and a second position. The centering member centers the device in the lumen and preferably is formed of a shape memory material. In yet another embodiment, the device includes an outer sheath and an inner member that are independently positionable, enabling the centering member to be selectively positionable. The centering member can be non porous, such that the centering member also occludes fluid flow.

L'invention concerne un dispositif de production de lumière permettant d'éclairer les tissus adjacents à une lumière d'un corps, tandis qu'une extrémité distale du dispositif est centrée dans la lumière, de manière à engendrer une thérapie photodynamique. Ledit dispositif peut soit faire obstacle ou déplacer le liquide corporel, sans l'utilisation d'un ballon. Dans un mode de réalisation, une lumière de perfusion présente un orifice adjacent à un réseau de sources lumineuses, ce qui manière à déplacer le liquide corporel, lequel peut également absorber la lumière. Dans un autre mode de réalisation, un élément de centrage centre le dispositif dans la lumière et il est fabriqué, de préférence, dans un matériau à mémoire de forme. Dans un autre mode de réalisation, le dispositif comprend une enveloppe extérieure et un élément intérieur qui peuvent être positionnés de manière indépendante, ce qui permet à l'élément de centrage d'être positionné de manière sélective. L'élément de centrage peut être non poreux, de sorte que l'élément de centrage peut également obstruer l'écoulement du liquide.

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