Patent ID: 6945983
Filing Date: 2005-09-20
Classification: A61B

Abstract:
1. A trocar sleeve, comprising a housing, a shaft projecting from a distal side of said housing, a sealing made of an elastic material, said sealing being provided for sealing an instrument inserted into said trocar sleeve in a gas-tight manner versus a proximal direction of said sealing, said sealing having a disk-shaped portion extending transversally to a longitudinally axis of said trocar sleeve, a central opening being provided in said disk-shaped portion of said sealing, said central opening having a smallest diameter in a first, not yet stretched rest position of said sealing, and a spreading device for stretching said elastic material of said sealing in a manner to enlarge said diameter of said central opening, said spreading device comprising a sleeve being movable along said longitudinal axis of said trocar sleeve, a ring-shaped facial end of said movable sleeve resting on said disk-shaped portion of said sealing, and a lock mechanism comprising at least three lock positions wherein said spreading device is not movable, said at least three lock positions comprising a zero position without stretching and spreading said sealing, a second position of a maximum stretching of said sealing, and at least one intermediate position between said zero position and said second maximum stretching position for intermediate spreading of said sealing.