| 摘要 |
A cannula device for removing, including by aspirating, bodily material is disclosed. The device may include a cannula and a hub. The cannula includes an open proximal end and a deflectable distal segment, and one or a plurality of distal orifices fluidly connected to the lumen. When distally extended from an outer guide cannula, the deflectable segment assumes a curved shape, which includes temperature-dependent curvature subject to elevated temperature along a memory metal length of the cannula. |
| 主权项 |
1. A cannula device configured for removing bodily material from a target site, the cannula device comprising:
a needle cannula defining:
a proximal length that is longitudinally straight s as to define a longitudinal axis, with an open proximal end;a deflectable distal segment length
including memory metal material,disposed opposite the proximal end, andterminating at a distal end terminus; anda cannula lumen extending from the open proximal end to at least one distal end region orifice, where the deflectable distal segment length including memory metal material is temperature-dependent, being configured such that,
at a first elevated temperature, greater than an initial temperature, the memory metal is configured such that the distal segment, when unconstrained, 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, when unconstrained, forms a second curved shape having a second degree of curvature out of the longitudinal axis, different than the first degree of curvature. |
