Access catheter and method for maintaining separation...

A - Human Necessities – 61 – M

Patent

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Details

A61M 25/09 (2006.01) A61B 1/00 (2006.01) A61B 1/04 (2006.01) A61B 1/06 (2006.01) A61B 1/303 (2006.01) A61B 1/32 (2006.01) A61B 19/00 (2006.01) A61B 17/22 (2006.01)

Patent

CA 2231607

A method and apparatus are provided for imaging a narrow body lumen (16), the method comprising maintaining separation between a distal end (20) of an optical viewing scope (14) and a lumen wall (16) with a spacing structure (74) which extends distally from the distal end of an access catheter (72). Optional spacing structures include distal cages (74) and a guidewire (122) which is fixed to and extends distally from the access catheter body. The invention is beneficial during retrograde imaging of the fallopian tube, and also allows antigrade imaging and advancing the access catheter and scope under the direction of the image provided, as it prevents the tubal wall from coming into such close proximity to a falloposcope as to produce "white-out" on the imaging monitor.

La présente invention concerne un procédé et un équipement de production d'images d'une lumière corporelle étroite (16), ce procédé comprenant le maintien de la séparation entre l'extrémité distale (20) d'un endoscope (14) et une paroi (16) de la lumière au moyen d'un dispositif écarteur (74) qui s'étend, du côté distal, à partir de l'extrémité distale d'une sonde d'accès (72). Des dispositifs d'écartement possibles comprennent des cages distales (74) et un guide-câble (122) qui est fixé au corps de la sonde d'accès et s'en éloigne dans le sens distal. L'invention est intéressante pour la fourniture d'images rétrogrades de la trompe de Fallope et elle permet aussi de réaliser des images antigrades et de faire avancer la sonde d'accès et l'endoscope en se dirigeant d'après l'image fournie tout en empêchant la paroi tubaire de se rapprocher d'un falloscope au point de donner de la "neige" sur l'écran de visualisation.

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