MULTISTATE-CURVATURE DEVICE AND METHOD FOR DELIVERING A CURABLE MATERIAL INTO BONE
First Claim
1. A system for injecting curable material to a delivery site within a bone structure, the system comprising:
- a guide cannula including a generally straight body longitudinally encompassing and defining a guide cannula lumen; and
a delivery cannula with a longitudinal tubular body dimensioned to be disposed through, and to extend beyond a distal end of the guide cannula lumen, the delivery cannula including;
an open, proximal end,a deflectable distal segment, opposite the proximal end, including a distal tip,a delivery cannula lumen extending from the proximal end;
where the delivery cannula body comprises a memory metal material such that the delivery cannula body includesa first state at a first temperature where the delivery cannula body is generally longitudinally straight, substantially defining a longitudinal axis;
a second state at a second temperature, greater than the first temperature, where the memory metal is configured such that the distal segment forms a first curved shape having a first degree of curvature away from the longitudinal axis; and
a third state at a third temperature, greater than the second temperature, where the memory metal is configured such that the distal segment forms a second curved shape having a second degree of curvature away from the longitudinal axis.
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Accused Products
Abstract
A curable material delivery cannula device and method are disclosed. The device includes a cannula and a hub. The cannula includes an open proximal end, a deflectable segment forming a plurality of pre-set curves, each of which corresponds to a pre-determined temperature of the cannula, a lumen, and side orifice(s) adjacent, and proximally spaced from, the distal end and fluidly connected to the lumen. When distally extended from the guide cannula, and upon being heated to a predetermined temperature (before, during, or after extension), the deflectable segment assumes a curved shape, which may be used to create a void in the bone for receiving curable material. The distal cannula end includes a blunt tip for non-traumatic interface with bodily material. During use, curable material, such as bone cement, is delivered from the side orifice(s) in a radial direction relative to the lumen.
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Citations
20 Claims
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1. A system for injecting curable material to a delivery site within a bone structure, the system comprising:
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a guide cannula including a generally straight body longitudinally encompassing and defining a guide cannula lumen; and a delivery cannula with a longitudinal tubular body dimensioned to be disposed through, and to extend beyond a distal end of the guide cannula lumen, the delivery cannula including; an open, proximal end, a deflectable distal segment, opposite the proximal end, including a distal tip, a delivery cannula lumen extending from the proximal end; where the delivery cannula body comprises a memory metal material such that the delivery cannula body includes a first state at a first temperature where the delivery cannula body is generally longitudinally straight, substantially defining a longitudinal axis; a second state at a second temperature, greater than the first temperature, where the memory metal is configured such that the distal segment forms a first curved shape having a first degree of curvature away from the longitudinal axis; and a third state at a third temperature, greater than the second temperature, where the memory metal is configured such that the distal segment forms a second curved shape having a second degree of curvature away from the longitudinal axis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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9. The system of claim 9, where said controller includes indicia corresponding to the temperature and/or curvature desired for the delivery cannula.
Specification