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US 2014/0276840 A1Published application
Tools and methods for tissue removal
AssigneeDePuy Synthes Products, Inc.
InventorsJörn Richter, Salman Chegini, Daniel Thommen
Life of this patent
Estimating the term…
Abstract
The present invention is directed to material removal instrument for forming cavities in interior body regions, particularly cavities in intervertebral discs and vertebrae. The instrument includes a cannula and a rotation mechanism disposed at least partially within the cannula. A cutting element extends from the rotation mechanism and impacts and dislocates tissue as the rotation mechanism is rotated within the body. Dislocated tissue with withdrawn from the body via the cannula.
Claims24
A material removal instrument, comprising,
- a cannula including:
- a cannula bore;
- and
- a cannula opening at a distal end of the cannula, the cannula opening providing access to the cannula bore;
- and
- a rotation mechanism disposed at least partially within the cannula, the rotation mechanism including:
- an elongated shaft having a central bore and an opening at a distal end of the elongated shaft providing access to the central bore;
- projections extending from a portion of the elongated shaft;
- a blade extending from an other portion of the elongated shaft for dislocating material from a target area, at least a portion of the blade extends from the cannula opening;
- wherein the rotation mechanism is rotatable within the cannula to cause the blade to dislocate material from the target area,
- wherein the dislocated material is drawn from the target area through the cannula bore.
8 more elements
A material removal instrument, comprising,
- a cannula including:
- a cannula bore;
- and
- a cannula opening at a distal end of the cannula, the cannula opening providing access to the cannula bore;
- and
- a rotation mechanism disposed at least partially within the cannula, the rotation mechanism including:
- an elongated shaft;
- a thread extending from a portion of the elongated shaft for dislocating material from a target area, the thread including a flank having a leading side and a trailing side, the trailing side having a flank angle less than 90° with respect to a longitudinal axis of the rotation mechanism;
- wherein at least a portion of the rotation mechanism extends from the cannula opening,
- wherein the rotation mechanism is rotatable within the cannula to cause the thread to impact and dislocate material from the target area.
7 more elements
A material removal instrument, comprising,
- a cannula including:
- a cannula bore;
- and
- a cannula opening at a distal end of the cannula, the cannula opening providing access to the cannula bore;
- and
- a rotation mechanism disposed at least partially within and rotatable within the cannula, the rotation mechanism including:
- an elongated shaft;
- a connection element fixed to the elongated shaft;
- and
- a mass element for dislocating material from a target area, the mass element fixed to the connection element,
- wherein rotation of the rotation mechanism causes the connection element to move in a direction away from a longitudinal axis of the rotation mechanism and causes the mass element to rotate about the longitudinal axis of the rotation mechanism at a distance from the longitudinal axis.
- wherein rotation of the mass element causes the mass element to impact and dislocate material from the target area.
9 more elements
A material removal instrument, comprising,
- a cannula including:
- a cannula bore;
- and
- a cannula opening at a distal end of the cannula, the cannula opening providing access to the cannula bore;
- and
- a cutting element disposed at least partially within the cannula, the cutting element attached to an inner element,
- wherein the cutting element expands radially from the cannula opening upon movement of the inner element from a first position to a second position in a direction along a longitudinal axis of the cannula,
- wherein rotation of the cannula with the cutting element in the expanded position causes the cutting element to impact and dislocate material from a target area.
5 more elements
Dependencies are inferred from the claim text.