Expandable cannula and method of use
AssigneeKyphon SARL
InventorsAmy L. Arthur, Mojan Goshayeshgar
Life of this patent
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Abstract
A cutting device includes an elongated shaft that extends between a proximal end and a distal end. A distal arm extends from the distal end of the elongated shaft. The distal arm includes an inner surface defining a cavity and an outer surface defining a blunt tip. At least one proximal arm extends from the distal end of the elongated shaft at a position proximal to the distal arm. The at least one proximal arm having an inner surface defines a cavity including a cutting portion configured to cut tissue.
Claims20
A device for enlarging the diameter of a hole in tissue:
- an elongated shaft extending between a proximal end and a distal end and including an outer surface;
- a stylet disposed within the elongated shaft, the stylet being configured to retractably extend out of the elongated shaft so as to contact tissue;
- and
- a cutting portion disposed on a portion of the outer surface of the elongated shaft, the cutting portion configured to cut tissue as the shaft is inserted into the tissue so as to enlarge the diameter of the hole in the tissue.
A cannula for expanding a diameter of a hole in tissue:
- an elongated shaft extending between a proximal end and a distal end and including a first portion and a second portion extending parallel to the first portion;
- and
- a rod disposed within the elongated shaft, the rod being configured to retractably expand the elongated shaft such that the first portion and the second portion move from a first collapsed orientation such that the first and second portion are disposed adjacent to each other to a second expanded orientation such that the first and second portion are disposed at a distance from each other so as to enlarge the hole in the tissue.
A method of using a device to enlarge a hole in tissue comprising:
- cutting a hole in the tissue;
- inserting a cannula comprising an elongated shaft extending between a proximal end and a distal end and including a first portion and a second portion extending parallel to the first portion;
- and a rod disposed within the elongated shaft, the rod being configured to retractably expand the elongated shaft such that the first portion and the second portion from a first collapsed orientation such that the first and second portion are disposed adjacent to each other to a second expanded orientation such that the first and second portion are disposed at a distance from each other so as to enlarge the hole in the tissue;
- and
- manipulating the rod to expand the first and second portion to the expanded orientation to expand the hole in the tissue.
Dependencies are inferred from the claim text.