Rotatable cutting instrument and method
AssigneeKyphon SARL
InventorCraig E. Lauchner
Life of this patent
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Abstract
A surgical instrument includes a first member having an inner surface defining a first passageway. A second member is disposable within the first passageway and movable relative to the first member. The second member defines a longitudinal axis and extends between a first end and a second end configured to engage tissue. The second end includes a first surface configured for a non-penetrating engagement with the tissue and a second surface including at least two spaced apart cutting members extending axially from the first surface. The cutting members are rotatable to excise a portion of the tissue. Systems and methods are disclosed.
Claims20
A surgical instrument comprising:
- a first member including an inner surface defining a first passageway;
- and
- a second member disposable within the first passageway and movable relative to the first member, the second member defining a longitudinal axis and extending between a first end and a second end configured to engage tissue,
- the second end including a first surface configured for a non-penetrating engagement with the tissue and a second surface including at least two spaced apart cutting members extending axially from the first surface, wherein the cutting members are rotatable to excise a portion of the tissue.
A surgical instrument comprising:
- a cannula including an inner surface defining a passageway;
- and
- a tubular shaft disposable within the passageway and axially translatable relative to the cannula, the shaft defining a longitudinal axis and extending between a first end and a second end configured to engage a ligamentum flavum,
- the second end including a distal face configured for a non-penetrating engagement with the ligamentum flavum and at least two spaced apart cutting blades extending axially from the distal face, wherein the blades each include a tip configured to axially pierce the ligamentum flavum and the blades are rotatable relative to the cannula to excise a portion of the ligamentum flavum.
A surgical instrument comprising:
- a first member including an inner surface defining a first passageway;
- and
- a second member disposable within the first passageway and movable relative to the first member, the second member defining a longitudinal axis and extending between a first end and a second end configured to engage a ligamentum flavum, the second end including a distal face configured for a non-penetrating engagement with the ligamentum flavum and a second surface including at least two spaced apart cutting blades extending axially from the distal face, wherein the cutting blades are rotatable to excise a portion of the ligamentum flavum;
- and
- a third member disposable within the first passageway and movable relative to the first member, the third member extending between a first end and a second end configured to penetrate laminae and form a cavity therein.
Dependencies are inferred from the claim text.