Iris valve with novel locking mechanism and control ring

A - Human Necessities – 61 – B

Patent

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Details

A61B 17/34 (2006.01) A61B 17/00 (2006.01)

Patent

CA 2677449

A laparoscopic surgical access device comprises a first frame and a second frame having relative axial positions. A flexible and resilient iris valve is connected to the first and second frames and has a closed position and an opened position based on the relative angular position of the first and second frames. A lock is connected to the first and second frames, the lock being selectively operative to prevent relative rotational movement in a first rotational direction. One embodiment uses a ratchet and pawl mechanism operable with a control ring. Another embodiment uses a ratchet and pawl mechanism operable with a button. Yet another embodiment uses a wedge track and ball mechanism.

La présente invention concerne un dispositif d'accès chirurgical de laparoscopie comportant un premier cadre et un second cadre ayant des positions axiales relatives. Une vanne de type iris flexible et élastique est raccordée aux premier et second cadres et présente une position fermée et une position ouverte selon la position angulaire relative des premier et second cadres. Un verrou est raccordé aux premier et second cadres, le verrou étant de fonctionnement sélectif pour interdire le mouvement de rotation relatif dans une première direction de rotation. Un mode de réalisation utilise un mécanisme d'encliquetage opérable avec une bague de contrôle. Un autre mode de réalisation utilise un mécanisme d'encliquetage opérable avec un bouton. Encore un autre mode de réalisation utilise un mécanisme de piste et roulements de calage.

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