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US 11,109,890 B2Granted
Vertebral body access cannula with enhanced bending stiffness
AssigneeKyphon SARL
InventorsCalin Druma, Samuel Bolosan, Hester Chan
Life of this patent
Estimating the term…
Abstract
A kyphoplasty cannula includes a shaft extending between opposite first and second end surfaces. The shaft has an inner surface defining a lumen. The shaft has a first opening that extends through the first end surface and a second opening that extends through the second end surface. A scoop extends from the second end surface. The scoop has an arcuate inner surface that is continuous with the inner surface of the shaft an opposite outer surface. The scoop has a rib. Kits and methods of use are disclosed.
Claims18
A cannula for kyphoplasty, the cannula comprising:
- a shaft extending along a longitudinal axis between opposite first and second end surfaces, the shaft comprising an inner surface defining a lumen, the shaft comprising a first opening that extends through the first end surface and a second opening that extends through the second end surface;
- and
- a scoop comprising opposite first and second side walls each extending from the second end surface, the first side wall including a first top surface, the second side wall including a second top surface, the top surfaces extending parallel to one another along at least a portion of the scoop, the scoop comprising an arcuate inner surface that is continuous with the inner surface of the shaft and an opposite outer surface, the scoop having a maximum width, the maximum width being equal to a maximum width of the shaft, the scoop including a first portion, a second portion and a third portion between the first portion and the second portion, the third portion including a rib having a radius of curvature that is less than a radius of curvature of the first portion or the second portion, the rib extending parallel to the longitudinal axis and comprising a concave inner surface that is continuous with the arcuate inner surface and a convex outer surface that is continuous with the outer surface, the rib being spaced apart from the second top surface, the scoop having only one rib, a portion of the arcuate inner surface between the second end surface and the rib having a continuous radius of curvature from the first top surface to the second top surface.
A cannula for kyphoplasty, the cannula comprising:
- a shaft extending along a longitudinal axis between opposite first and second end surfaces, the shaft comprising an inner surface defining a lumen, the shaft comprising a first opening that extends through the first end surface and a second opening that extends through the second end surface;
- and
- a scoop extending from the second end surface, the scoop comprising an arcuate inner surface that is continuous with the inner surface of the shaft and an opposite outer surface, the scoop including opposite first and second side walls that each extend from the second end surface, the first side wall including a first top surface, the second side wall including a second top surface, the top surfaces lying in a plane, the plane containing the longitudinal axis, the scoop having a maximum width, the maximum width being equal to a maximum width of the shaft, the scoop including only one rib, the rib extending outwardly from the outer surface, the rib extending parallel to the longitudinal axis, the rib being positioned equidistant between the first and second top surfaces, the rib being spaced apart from the second top surface, a portion of the arcuate inner surface between the second end surface and the rib having a continuous radius of curvature from the first top surface to the second top surface.
A cannula for kyphoplasty, the cannula comprising:
- a shaft extending along a longitudinal axis between opposite first and second end surfaces, the shaft comprising an inner surface defining a lumen, the shaft comprising a first opening that extends through the first end surface and a second opening that extends through the second end surface;
- and
- a scoop comprising opposite first and second side walls that each extend from the second end surface, the first side wall including a first top surface, the second side wall including a second top surface, the top surfaces extending parallel to one another along at least a portion of the scoop, the scoop comprising an arcuate inner surface that is continuous with the inner surface of the shaft and an opposite outer surface, the arcuate inner surface extending from the first top surface to the second top surface, the first and second side walls each being tapered from the second end surface to a distal end surface of the scoop, the scoop having a maximum width, the maximum width being equal to a maximum width of the shaft, the scoop including only one rib, the rib extending outwardly from the outer surface, the rib extending parallel to the longitudinal axis, the rib being positioned equidistant between the first and second side walls, the rib being spaced apart from the second top surface, a portion of the arcuate inner surface between the second end surface and the rib having a continuous radius of curvature from the first top surface to the second top surface.
Dependencies are inferred from the claim text.