Surgical Instrument Aspiration Valve
AssigneeSmith & Nephew, Inc.
InventorDouglas D. Sjostrom
Life of this patent
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Abstract
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.
Claims17
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.
A surgical instrument hub comprising:
- a body having a wall defining a longitudinal channel for receiving a moving member,
- the wall defining first and second apertures positioned proximate openings defined in the moving member during a portion of the movement of the moving member,
- the first and second apertures and the openings cooperating 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,
- edges of the openings and the first and second apertures cutting collected tissue during closing of the aspiration valve,
- the body including a coupling configured to connect the body to a handle.
Dependencies are inferred from the claim text.