Surgical cutting device with shield drive mechanism
Inventors
Grace, Kenneth P. • Sotak, Ryan M.
Assignees
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Publication Number
US-11690644-B2
Publication Date
2023-07-04
Expiration Date
Abstract
Devices for removing implanted objects from body vessels are provided. A device includes a sheath assembly having a cutting tip. The cutting tip includes a cutting surface that is adapted to cut tissue coupled to an implanted object as the cutting tip rotates. The sheath assembly further includes an outer shield carried outside of the cutting tip. The outer shield includes a distal opening, and the outer shield is translatable relative to the cutting tip from a first position to a second position and vice versa. In the first position the cutting surface of the cutting tip is disposed within the outer shield, and in the second position the cutting tip extends through the distal opening and the cutting surface is at least partially disposed outside of the outer shield.
Core Innovation
The invention relates to a surgical extraction device for removing an implanted object from a body vessel. The device includes an outer sheath assembly and an inner sheath assembly disposed within the outer sheath assembly, with a cutting tip disposed adjacent a distal end of the inner sheath assembly and including a cutting surface for interacting with the implanted object during removal.
A shield distal end is provided on an outer shield disposed adjacent the distal end of the outer sheath. The outer shield is movable between a first position and a second position, with the outer shield more distal in the second position relative to the first position, and a shield drive mechanism is configured to translate the outer shield between the first and second positions.
The device further includes actuation of the cutting tip so it is translated relative to the distal end of the outer sheath and rotated using a cutting tip drive mechanism coupled to a translation mechanism. Embodiments describe a shielded arrangement that maintains shielding during actuation by coordinating outer shield translation with cutting-tip movement.
Claims Coverage
The independent claims cover a nested sheath system with a translatable outer shield moved between first and second positions, an intermediate sheath coupled via a cam-and-follower assembly, and a cutting tip driven to rotate and, in one independent claim, translate relative to the distal end of the outer sheath. Across the independent claims, the main inventive features number five.
Outer sheath assembly with outer shield adjacent distal end
An outer sheath assembly comprising an outer sheath and an outer shield disposed adjacent a distal end of the outer sheath, the outer shield comprising a shield distal end.
Inner sheath assembly with cutting tip cutting surface
An inner sheath assembly disposed within the outer sheath assembly, the inner sheath assembly comprising an inner sheath and a cutting tip disposed adjacent a distal end of the inner sheath, wherein the cutting tip has a cutting surface.
Shield drive mechanism translating outer shield between first and second positions
A shield drive mechanism coupled to the outer sheath assembly and configured to translate the outer shield from a first position to a second position and vice versa, wherein the outer shield is more distal in the second position relative to the first position.
Intermediate sheath coupled via cam and follower translation
An intermediate sheath assembly disposed between the inner sheath assembly and the outer sheath assembly, wherein the intermediate sheath assembly is coupled to the outer sheath by a cam and follower assembly that translates the outer sheath assembly relative to the intermediate sheath assembly.
Translation and rotation of cutting tip relative to distal end
A translation mechanism for translating the cutting tip relative to the distal end of the outer sheath; and a cutting tip drive mechanism for rotating the cutting tip, the cutting tip drive mechanism coupled to the translation mechanism, whereupon actuation of the cutting tip drive mechanism, the cutting tip rotates and translates.
Overall, the independent claims require coordination between a translatable outer shield and a cutting tip positioned and driven relative to the distal end of the outer sheath. The cam-and-follower coupling between the intermediate sheath assembly and the outer sheath assembly is a central structural feature, and the cutting tip is configured to rotate with translation via a coupled translation mechanism in the second independent claim.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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