Device and method for delivering a curable material into bone

摘要

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 and a deflectable distal segment, and a distal orifice(s) fluidly connected to the lumen. When distally extended from the guide cannula, the deflectable segment assumes a curved shape, which may be used to create a void in the bone for receiving curable material. During use, curable material, such as bone cement, is delivered from the distal orifice(s).

主权项

1. A cannula device for delivering a curable material, such as bone cement, into bone as part of a curable material delivery system, the device comprising:
a delivery cannula defining:
an open, proximal end in and extending through a hub;a proximal length that is longitudinally straight and that defines a longitudinal axis;a deflectable segment including memory metal material, disposed opposite the proximal end, and terminating in a distal end; anda delivery cannula lumen extending from the proximal end, at least one distal end region orifice fluidly connected to the lumen, wherein the deflectable segment forms a curved shape in longitudinal extension and has a shape memory characteristic such that the deflectable segment is configured to assume a substantially longitudinally straightened form generally along the longitudinal axis when subjected to a force and naturally revert to the curved shape upon removal of the force; where the curved shape of the deflectable segment including memory metal material is temperature-dependent, being configured such that, at a first elevated temperature, greater than an initial temperature at which the deflectable segment including memory metal material is in its substantially longitudinally straightened form, the memory metal is configured such that the distal segment forms a first curved shape having a first degree of curvature out of the longitudinal axis, and at a second elevated temperature, greater than the first elevated temperature, the memory metal is configured such that the distal segment forms a second curved shape having a second degree of curvature out of the longitudinal axis.