System of indicia for a medical device

Details System of indicia for a medical device System of indicia for a medical device

A - Human Necessities

61

M

A61M 25/01 (2006.01) A61B 17/94 (2006.01) A61M 25/095 (2006.01) A61M 25/098 (2006.01)

Patent

CA 2414258

The present invention involves a elongated member, such as a wire guide, that is used with in a endoscopic procedure. In one aspect of the invention, the elongate member includes a first system of indicia comprising a scale reference markings that can include numeric indicia, sequentially increasing markers, etc., located at regular increments (e.g., 1 cm) on the distal portion of the elongate member, that permit measurement of structures within a body passage. In one example, an exchange wire guide having a radiopaque marker on the distal portion is positioned under fluoroscopy at a first location, such as the distal point of a structure, and the scale reference marking on the wire guide that visible in the viewing region of the endoscope is read. The wire guide is partially withdrawn such that the marker corresponds to a second position (e.g., the proximal point of the stricture) and the new scale reference marking is read. The difference is calculated to determine the length of the structure. In a second aspect of the invention, a second system of indicia are included to aid the endoscopist in maintaining the device in position. These indicia, which may include oblique markings, helical striping, or some other closely spaced markings or pattern, help in the detection of longitudinal movement of the device.

La présente invention concerne un élément allongé, tel qu'un guide-fil, qu'on utilise dans une opération par endoscopie. Dans un aspect de l'invention, l'élément allongé comprend un premier système de marquage présentant des repères de référence gradués pouvant inclure un marquage numérique, des repères incrémentiels, etc., disposés à intervalles réguliers (p. ex. 1 cm) sur la partie distale de l'élément allongé, qui permettent de mesurer des structures placées dans un passage corporel. Dans un exemple, un guide-fil d'échange comprenant un marqueur radio-opaque sur la partie distale est placé, sous fluoroscopie, à un premier emplacement tel que le point distal d'une structure, et les repères de référence sur le guide-fil, visibles dans la zone de visualisation de l'endoscope, sont lus. Le guide-fil est partiellement retiré de sorte que le marqueur corresponde à une seconde position (p. ex. le point proximal de la structure) et les nouveaux repères de référence gradués sont lus. La différence est calculée afin de déterminer la longueur de la structure. Dans un second aspect de l'invention, un second système de marquage aide le praticien effectuant l'endoscopie à maintenir le dispositif en place. Ces repères, qui peuvent inclure des marques obliques, des marques hélicoïdales, ou d'autres marques ou motifs rapprochés, permettent de détecter un mouvement longitudinal du dispositif.

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