Medical instrument

A - Human Necessities – 61 – B

Patent

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Details

A61B 1/07 (2006.01) A61B 17/42 (2006.01)

Patent

CA 2761869

The invention relates to a medical instrument comprising an elongated element, which is preferably configured for transoral placement in a stomach, and an end effector (100) arranged at one end of the elongated element, wherein the end effector (100) can be operated by means of a hydraulic operating mechanism (1), wherein the hydraulic operating mechanism (1) comprises a cylinder (20) having at least one, preferably two, three, four, or five, overflow channels (21a, 21b, 21c, 21d) for a hydraulic fluid, which are connected to the cylinder interior by means of at least one bore (22a, 22b, 22b', 22c, 22c', 22d, 22d'), a piston (30) arranged in the cylinder (20) and movable along the longitudinal axis of the cylinder (20) is provided, wherein the piston (30) divides the interior (23) of the cylinder (20) into a first cylinder chamber (23a) and a second cylinder chamber (23b) and is connected to the end effector (100) by means of a piston rod (31), and at least one connection (41) for introducing hydraulic fluid into the first cylinder chamber (23a) and at least one further connection (41a, 41b, 41c, 41d), which is connected to at least one overflow channel (21a, 21b, 21c, 21d) of the cylinder (20), are provided.

La présente invention concerne un instrument médical ayant un élément allongé, configuré de préférence pour assurer une mise en place par voie transorale dans l'estomac, et un effecteur terminal (100) agencé à une extrémité de l'élément allongé, cet effecteur terminal (100) pouvant être actionné au moyen d'un mécanisme d'actionnement hydraulique (1). Le mécanisme d'actionnement hydraulique (1) présente un cylindre (20) ayant au moins un, de préférence deux, trois, quatre ou cinq canaux de trop-plein (21a, 21b, 21c, 21d) destinés à un fluide hydraulique et reliés à l'espace intérieur du cylindre au moyen d'au moins un trou (22a, 22b, 22b', 22c, 22c', 22d, 22d'), un piston (30) agencé dans le cylindre (20) et mobile le long de l'axe longitudinal du cylindre (20) étant prévu. Ce piston (30) partage l'espace intérieur (23) du cylindre (20) en un premier espace (23a) et en un second espace (23b) et est raccordé à l'effecteur terminal (100) au moyen d'une tige de piston (31). L'invention prévoit aussi au moins un raccord (41) pour introduire le fluide hydraulique dans le premier espace (23a) du cylindre et au moins un autre raccord (41a, 41b, 41c, 41d) raccordé à au moins un canal de trop-plein (21a, 21b, 21c, 21d) du cylindre (20).

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