Surgical Instrument Aspiration Valve

摘要

A surgical instrument includes a movable member having a proximal portion, the movable member defining an opening at the proximal portion. The instrument includes a stationary member defining an aperture. The stationary member is arranged relative to the movable member with a close fit between the stationary member and the movable member such that aspiration occurs through the movable member substantially only during a portion of a repetitive motion of the movable member. The instrument includes a surgical handpiece coupled to the movable member and the stationary member to provide suction and motion to the movable member.

主权项

1. A surgical instrument hub comprising:
a body having a wall defining a longitudinal channel for receiving a moving member, the moving member having a distal portion distal the body and configured and arranged to contact tissue, the wall defining first and second apertures that overlay openings defined in a proximal portion of the moving member to define an aspiration valve configured to change a level of fluid communication between the first and second apertures and the openings in the moving member as the moving member moves, the first and second apertures defined in part by beveled edges for cutting tissue, the openings in the moving member rotating about an axis, the openings in the moving member switching between aligning with the first aperture and the second aperture to provide discontinuous flow from the distal portion through a bore in the moving member and out the first aperture and second aperture, a rotation of the moving member about the axis shearing tissue; and the body including a coupling configured to connect the body to a handle.