Apparatus and methods for retrieving an object from a body...

A - Human Necessities – 61 – B

Patent

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A61B 17/221 (2006.01)

Patent

CA 2733568

The present invention provides apparatus and methods for retrieving an object from a body passage. In one embod-iment, the apparatus comprises a first tube member, and optionally a second tube member. A proximal region of an arm is secured in place, while a distal region of the arm is coupled to a loop member of a snare. In use, proximal and distal advancement of a control member coupled to the loop member moves the loop member between collapsed and expanded states, respectively. In the collapsed state, the arm preferably does not extend radially beyond an outer diameter of the first tube member, thereby facilitating advancement of the retrieval device to a target site, e.g., via an endoscope. In the expanded state, the arm may move away from the first and second tube members, facilitate positioning of the loop member, and may facilitate capture of the object from the body passage.

L'invention concerne un appareil et des procédés pour récupérer un objet depuis un passage corporel. Dans un mode de réalisation, l'appareil comprend un premier élément tubulaire, et facultativement un second élément tubulaire. Une zone proximale d'un bras est fixée en place, tandis qu'une zone distale du bras est couplée à un élément de boucle d'un collet. En utilisation, une progression proximale et distale d'un élément de commande couplé à l'élément de boucle déplace l'élément de boucle entre des états aplati et agrandi, respectivement. Dans l'état aplati, le bras ne s'étend de préférence pas radialement au-delà d'un diamètre extérieur du premier élément tubulaire, en facilitant ainsi une progression du dispositif de récupération vers un site cible, par exemple via un endoscope. Dans l'état agrandi, le bras peut se déplacer loin des premier et second éléments tubulaires, faciliter un positionnement de l'élément de boucle, et faciliter une capture de l'objet à partir du passage corporel.

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