Valve assembly including diameter reduction structure for...

A - Human Necessities – 61 – B

Patent

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A61B 17/34 (2006.01)

Patent

CA 2424914

A valve assembly and diameter reduction structure for trocar employing a movable diameter reduction structure. The diameter reduction structure is positioned in proximity to a first seal and includes a plurality of stand off members movable between a first position, a second position, and a third position. The diameter reduction structure in the first position reduces the likelihood of the first seal losing its integrity by limiting excessive off- axis and angular movements of small diameter surgical instruments. When large diameter surgical instruments are positioned through the trocar, the diameter reduction structure pivots to accommodate the passage of larger diameter surgical instruments without any operational adjustments.

L'invention concerne un ensemble valve et une structure de réduction de diamètre pour trocart utilisant une structure de réduction de diamètre. La structure de réduction de diamètre est positionnée près d'un premier joint et comprend plusieurs éléments de séparation amovibles entre une première position, une deuxième position, et une troisième position. Sur la première position, la structure de réduction de diamètre réduit la probabilité que le premier joint perde son intégrité en limitant les mouvements hors axe et angulaires excessifs des instruments chirurgicaux de petit diamètre. Lorsque des instruments chirurgicaux de grand diamètre sont positionnés dans le trocart, la structure de réduction de diamètre pivote pour permettre le passage des instruments de plus grand diamètre sans aucun ajustement opérationnel.

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