Lead implant fixation mechanism
First Claim
1. An implantable medical electrical lead comprising:
- a connector;
an electrode;
an elongate insulation body extending between the connector and the electrode, the body surrounding a longitudinal axis;
an elongate conductor extending within the insulation body and coupling the electrode to the connector; and
a fixation mechanism comprising;
an outermost surface of the lead overlaying the insulation body and surrounding the longitudinal axis, the outermost surface including a plurality of depressions spaced apart from one another along a length of the body, wherein the outermost surface of the lead surrounds one or more lumens and each depression does not extend to any of the one or more lumens, wherein each depression defines an arc having an arc center on the longitudinal axis, and wherein each depression extends around at least part of the circumference of the body; and
a relatively flexible sleeve mounted around the outermost surface of the lead and surrounding the longitudinal axis, the sleeve comprising an internal surface, an external surface, and at least two suture grooves formed in the external surface and extending around a circumference thereof, the internal surface being in sliding engagement with the outermost surface of the lead, and a longitudinal center-to-center spacing between adjacent suture grooves being substantially the same as, or a multiple of, a longitudinal center-to-center spacing between adjacent depressions of the outermost surface of the lead,wherein the sleeve is configured to form an interlocking engagement between the internal surface of the sleeve and at least one of the depressions of the outermost surface of the lead, wherein when the sleeve is configured to form the interlocking engagement, a suture applying a constricting force around the circumference of one of the suture grooves generates a protrusion of the internal surface of the sleeve and the protrusion inserts into the depression of the outermost surface of the lead.
1 Assignment
0 Petitions
Accused Products
Abstract
A fixation mechanism of an implantable lead includes a plurality of depressions of an outermost surface of the lead and a relatively flexible sleeve mounted around the outermost surface. The depressions are spaced apart from one another along a length, and each extends circumferentially, wherein a longitudinal center-to-center spacing between each adjacent depression is uniform along the length, and each depression is of substantially the same size. The sleeve has an internal surface in sliding engagement with the outermost surface of the lead, and an external surface, in which suture grooves are formed. A longitudinal center-to-center spacing between adjacent suture grooves may be substantially the same as, or a multiple of, the longitudinal center-to-center spacing between adjacent depressions of the outermost surface of the lead. The sleeve may also include a ridge protruding from the internal surface, aligned with, or offset (by center-to-center spacing of depressions) from, the grooves.
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Citations
23 Claims
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1. An implantable medical electrical lead comprising:
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a connector; an electrode; an elongate insulation body extending between the connector and the electrode, the body surrounding a longitudinal axis; an elongate conductor extending within the insulation body and coupling the electrode to the connector; and a fixation mechanism comprising; an outermost surface of the lead overlaying the insulation body and surrounding the longitudinal axis, the outermost surface including a plurality of depressions spaced apart from one another along a length of the body, wherein the outermost surface of the lead surrounds one or more lumens and each depression does not extend to any of the one or more lumens, wherein each depression defines an arc having an arc center on the longitudinal axis, and wherein each depression extends around at least part of the circumference of the body; and a relatively flexible sleeve mounted around the outermost surface of the lead and surrounding the longitudinal axis, the sleeve comprising an internal surface, an external surface, and at least two suture grooves formed in the external surface and extending around a circumference thereof, the internal surface being in sliding engagement with the outermost surface of the lead, and a longitudinal center-to-center spacing between adjacent suture grooves being substantially the same as, or a multiple of, a longitudinal center-to-center spacing between adjacent depressions of the outermost surface of the lead, wherein the sleeve is configured to form an interlocking engagement between the internal surface of the sleeve and at least one of the depressions of the outermost surface of the lead, wherein when the sleeve is configured to form the interlocking engagement, a suture applying a constricting force around the circumference of one of the suture grooves generates a protrusion of the internal surface of the sleeve and the protrusion inserts into the depression of the outermost surface of the lead. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An implantable medical electrical lead comprising:
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a connector, an electrode, an elongate insulation body extending between the connector and the electrode, an elongate conductor extending within the insulation body and coupling the electrode to the connector, and a fixation mechanism, the fixation mechanism comprising; an outermost surface of the lead overlaying the insulation body, the outermost surface including a plurality of depressions spaced apart from one another along a length of the body, each depression extending around at least part of the circumference of the body, a longitudinal center-to-center spacing between each adjacent depression being uniform along the length, and each depression being of substantially the same size; and a relatively flexible sleeve mounted around the outermost surface of the lead, the sleeve comprising an internal surface, an external surface, at least two suture grooves formed in the external surface and extending around a circumference thereof, and at least two ridges protruding from the internal surface, the internal surface being in sliding engagement with the outermost surface of the lead, each ridge being sized to fit within one of the depressions of the outermost surface of the lead, and each ridge being longitudinally aligned with a corresponding suture groove. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. An implantable medical electrical lead comprising:
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a connector; an electrode; an elongate insulation body extending between the connector and the electrode, the insulation body including an outermost surface integral with the insulation body and the outermost surface including a plurality of depressions extending around at least a portion of the circumference of the insulation body, wherein the outermost surface of the insulation body surrounds one or more lumens and the plurality of depressions does not extend to any of the one or more lumens; an elongate conductor extending within the insulation body and coupling the electrode to the connector; and a relatively flexible sleeve mounted around the outermost surface of the insulation body and the plurality of depressions, the sleeve comprising an internal surface, an external surface, and at least one suture groove formed in the external surface and extending around a circumference of the sleeve, the internal surface configured to be moveable with respect to the outermost surface of the insulation body before sutured using the suture groove and configured to engage with at least one depression of the plurality of depressions of the outermost surface of the insulation body when sutured using the suture groove such that the internal surface of the sleeve is fixated with respect to the outermost surface of the insulation body by the interaction of the internal surface of the sleeve and the at least one depression of the outermost surface of the insulation body.
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19. An implantable medical electrical lead comprising:
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a connector; an electrode; an elongate insulation body extending between the connector and the electrode; an elongate conductor extending within the insulation body and coupling the electrode to the connector; and a fixation mechanism comprising; an outermost surface of the lead overlaying the insulation body, the outermost surface including a plurality of depressions spaced apart from one another along a length of the body, each depression extending around at least part of the circumference of the body; and a relatively flexible sleeve mounted around the outermost surface of the lead, the sleeve comprising an internal surface, an external surface, and at least two suture grooves formed in the external surface and extending around a circumference thereof, the internal surface being in sliding engagement with the outermost surface of the lead, and a longitudinal center-to-center spacing between adjacent suture grooves being substantially the same as, or a multiple of, a longitudinal center-to-center spacing between adjacent depressions of the outermost surface of the lead, wherein the sleeve further comprises a ridge protruding from the internal surface, the ridge being sized to fit within one of the plurality of depressions of the outermost surface of the lead. - View Dependent Claims (20, 21, 22, 23)
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Specification