Slidable Fixation Device for Securing a Medical Implant
First Claim
1. A method of retaining a medical implant to body tissue, the method comprising the steps of:
- receiving a medical implant comprising;
a generally cylindrical implant body having a plurality of longitudinal channels formed along an exterior surface of the body;
an outer jacket mounted about the implant body; and
a fixation device having an array of elongate tines slidably disposed in the respective channels and being joined together at a their proximal ends, each of the tines having a self-expanding distal end portion constrained and substantially straightened against the implant body by the outer jacket;
positioning the medical implant at an implantation site; and
distally advancing the fixation device such that the tines slide between the implant body and the jacket to release at least the distal end portions of the tines from the outer jacket, wherein the distal end portions of the tines released from the outer jacket splay outwardly from the implant body and radially curve backward to engage with body tissue to retain the medical implant at the implantation site.
1 Assignment
0 Petitions
Accused Products
Abstract
A fixation device for retaining a leadless medical implant to tissue includes an array of elongate tines having self-expanding distal portions. The fixation tines may be advanced between an implant body and an outer jacket to deploy the tines from a delivery configuration in which the tines are constrained by the outer jacket to an expanded configuration in which the distal end portions of the tines are released from the outer jacket. The implant and fixation device are contained within a sheath for delivery to the treatment site and a pusher within the sheath advances the fixation device relative to the implant body and deploys the tines. A distal end of the implant having an electrode may form a distal tip of the delivery system, and a potential implantation site may be tested prior to deployment of the fixation device to allow for easy repositioning of the implant.
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Citations
19 Claims
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1. A method of retaining a medical implant to body tissue, the method comprising the steps of:
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receiving a medical implant comprising; a generally cylindrical implant body having a plurality of longitudinal channels formed along an exterior surface of the body; an outer jacket mounted about the implant body; and a fixation device having an array of elongate tines slidably disposed in the respective channels and being joined together at a their proximal ends, each of the tines having a self-expanding distal end portion constrained and substantially straightened against the implant body by the outer jacket; positioning the medical implant at an implantation site; and distally advancing the fixation device such that the tines slide between the implant body and the jacket to release at least the distal end portions of the tines from the outer jacket, wherein the distal end portions of the tines released from the outer jacket splay outwardly from the implant body and radially curve backward to engage with body tissue to retain the medical implant at the implantation site. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for percutaneously delivering a medical implant to an implantation site, the system comprising:
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an outer sheath having a lumen extending there through; a medical implant slidably received within a distal portion of the outer sheath lumen, the implant comprising; a generally cylindrical implant body having a plurality of longitudinal channels formed along an exterior surface of the body, and a rounded distal end of the implant body that may be positioned to protrude from a distal end of the outer sheath to form a distal tip of the delivery system; an outer jacket mounted about the implant body; and a fixation device having an array of elongate tines having self-expanding distal end portions and being joined together at their proximal ends, the tines being slidably disposed in respective implant body channels such that the tines may be distally advanced between the implant body and the jacket to deploy the tines from a delivery configuration in which the tines are constrained and substantially straightened by the outer jacket to an expanded configuration in which the distal end portions of the tines are released from the outer jacket to radially curve backward. - View Dependent Claims (13, 14, 15, 16)
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17. A medical implant fixation system, the system comprising:
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a generally cylindrical implant body having a plurality of longitudinal channels formed along an exterior surface of the body, and a rounded distal end of the implant body that may be positioned to protrude from a distal end of the outer sheath to form a distal tip of the delivery system; an outer jacket mounted about the implant body; and a fixation device having an array of elongate tines having self-expanding distal end portions and being joined together at their proximal ends, the tines being slidably disposed in respective implant body channels such that the tines may be distally advanced between the implant body and the jacket to deploy the tines from a delivery configuration in which the tines are constrained and substantially straightened by the outer jacket to an expanded configuration in which the distal end portions of the tines are released from the outer jacket to radially curve backward. - View Dependent Claims (18, 19)
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Specification