Devices to resist migration and rotation of implants used in brachytherapy and other radiation therapy
First Claim
1. An anchor mechanism, adapted for use with an implantable structure that is adapted to be implanted into patient tissue using a hollow needle, where the structure is a strand comprising at least one radioactive seed, the anchor mechanism comprising:
- a main body having a main body diameter, a first longitudinal end and a second longitudinal end, and a bore that extends between the first and second longitudinal ends of the main body; and
a plurality of wings integrally formed with one of the first and second longitudinal ends of the main body and extending away from the main body in one of a leading and a trailing longitudinal direction without extending past the main body diameter;
wherein the anchor mechanism is adapted to be implanted into patient tissue adjacent the structure using the same hollow needle that is adapted to implant the structure into patient tissue; and
wherein the wings are biased such that at least a portion of the wings move outward past the main body diameter to engage surrounding patient tissue after the anchor mechanism is expelled from the hollow needle into patient tissue, to thereby reduce a tendency for both the anchor mechanism and the adjacent structure to migrate after implantation.
3 Assignments
0 Petitions
Accused Products
Abstract
A therapeutic member for use in brachytherapy deliverable to an implant site by way of a needle comprises a single radioactive source encapsulated by a bio-absorbable material having an outer surface including one or more ribs encircling the single radioactive source, a leading edge endcap rib and a trailing edge endcap rib. The one or more ribs reduces a tendency of the member to migrate and rotate within a patient'"'"'s body after implantation. The encapsulating material further includes a first rail formed from the bio-absorbable material extending at least from opposite sides of the outer surface of the encapsulating material along the longitudinal axis of the therapeutic member, and a second rail formed from the bio-absorbable material extending at least from opposite sides of the outer surface of the encapsulating material along the longitudinal axis of the therapeutic member, the second rail arranged in a plane substantially perpendicular to a plane in which the first rail is arranged. Another embodiment includes wings that selectively extend from an implant preventing movement of the implant.
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Citations
18 Claims
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1. An anchor mechanism, adapted for use with an implantable structure that is adapted to be implanted into patient tissue using a hollow needle, where the structure is a strand comprising at least one radioactive seed, the anchor mechanism comprising:
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a main body having a main body diameter, a first longitudinal end and a second longitudinal end, and a bore that extends between the first and second longitudinal ends of the main body; and a plurality of wings integrally formed with one of the first and second longitudinal ends of the main body and extending away from the main body in one of a leading and a trailing longitudinal direction without extending past the main body diameter; wherein the anchor mechanism is adapted to be implanted into patient tissue adjacent the structure using the same hollow needle that is adapted to implant the structure into patient tissue; and wherein the wings are biased such that at least a portion of the wings move outward past the main body diameter to engage surrounding patient tissue after the anchor mechanism is expelled from the hollow needle into patient tissue, to thereby reduce a tendency for both the anchor mechanism and the adjacent structure to migrate after implantation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An anchor mechanism, adapted for use with a radioactive seed that is adapted to be implanted into patient tissue using a hollow needle, the anchor mechanism comprising:
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a cylindrical main body having a main body diameter, a first end, a second end, and a bore that extends between the first and second ends of the cylindrical main body; a plurality of wings integrally formed with one of the first and second ends of the cylindrical main body and extending away from the cylindrical main body in one of a leading and a trailing longitudinal direction without extending past the main body diameter; and wherein the anchor mechanism is adapted to be implanted into patient tissue adjacent the radioactive seed using the same hollow needle that is adapted to implant the radioactive seed into patient tissue; wherein the anchor mechanism has a closed position and an open position; wherein when in the closed position the anchor mechanism fits into the hollow needle that is adapted to implant the radioactive seed into patient tissue; and wherein the wings are biased such that wings automatically move from the closed position outward to the open position past the main body diameter, after the anchor mechanism is expelled from the hollow needle into patient tissue, to thereby reduce a tendency for both the anchor mechanism and the adjacent radioactive seed to migrate after implantation. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification