Patent ID: 7713242
Filing Date: 2010-05-11
Classification: A61B,A61M

Abstract:
1. A trocar comprising a trocar sleeve with a valve cage coupled to an access end of the trocar sleeve; wherein the valve cage comprises a valve arrangement for surgical instruments disposed inside the valve cage that allows an inserted surgical instrument to pass through, the valve arrangement having a valve body of closed-cell, gas-tight foamed material with an upper surface and a bottom surface, the valve body further incorporating at least one slit lying in a plane and penetrating the valve body for inserting a surgical instrument, wherein the valve body receives the surgical instrument at the upper surface prior to inserting the surgical instrument and the surgical instrument passes through the bottom surface when the surgical instrument is inserted, characterized in that the upper surface of the valve body incorporates a beveled cutout that tapers towards the plane of the slit and guides the surgical instrument towards the slit for inserting the surgical instrument; wherein the valve body has a ring shaped hollow space with an outer circumference and an inner circumference, wherein the ring shaped hollow space is disposed beneath the portion of the valve body comprising the beveled cutout and above the bottom surface, wherein the outer circumference of the ring shaped hollow space is formed by the valve body, wherein a portion of the slit is surrounded by the ring shaped hollow space and extends into the ring shaped hollow space in the direction of the bottom surface prior to the insertion of the surgical instrument, wherein a portion of the beveled cutout is circumferentially surrounded by the ring shaped hollow space.