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:
- positioning a medical implant mounted within a distal portion of an outer sheath of a delivery system at an implantation site, wherein the medical implant has a fixation device slidably mounted thereon that includes an annular collar and an array of self-expanding tines that extend from the collar and wherein the tines are constrained and substantially straightened against the medical implant by the outer sheath during positioning; and
distally advancing the fixation device over the medical implant to release at least a portion of the tines from the outer sheath, wherein the at least a portion of the tines released from the outer sheath splay outwardly from the implant and radially curves backward towards the collar to engage with body tissue to retain the medical implant at the implantation site.
1 Assignment
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Accused Products
Abstract
A fixation device for retaining a leadless medical implant to tissue includes an annular collar and an array of self-expanding tines extending from the collar. When deployed, the annular collar encircles the implant and the tines are preset to splay outwardly from the implant to grab body tissue and anchor the implant at a treatment site. The implant and fixation device are contained within a sheath for delivery to the treatment site and a pushing force is applied to a pusher of the delivery system to distally advance the fixation device relative to the implant and deploy 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 if the potential implantation site is determined to be unacceptable.
181 Citations
20 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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positioning a medical implant mounted within a distal portion of an outer sheath of a delivery system at an implantation site, wherein the medical implant has a fixation device slidably mounted thereon that includes an annular collar and an array of self-expanding tines that extend from the collar and wherein the tines are constrained and substantially straightened against the medical implant by the outer sheath during positioning; and distally advancing the fixation device over the medical implant to release at least a portion of the tines from the outer sheath, wherein the at least a portion of the tines released from the outer sheath splay outwardly from the implant and radially curves backward towards the collar 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)
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11. 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, wherein a rounded distal end of the medical implant may protrude from a distal end of the outer sheath to form a distal tip of the delivery system; and a fixation device having an annular collar and an array of self-expanding tines that extend from the collar, wherein the fixation device is slidably mounted on the medical implant such that the fixation device may be distally advanced over the medical implant to deploy the tines from a delivery configuration in which the tines are constrained and substantially straightened by the outer sheath to an expanded configuration in which at least a portion of the tines is released from the outer sheath to radially curve backward towards the collar. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A medical implant fixation system, the system comprising:
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a medical implant percutaneously deliverable and implantable at a vessel wall; a fixation device having an annular collar and an array of self-expanding tines that distally extend from the collar and radially curve backward towards the collar when deployed, wherein the fixation device is slidably mounted on the medical implant such that the fixation device may be distally advanced over the medical implant to deploy the tines and retain the medical implant to body tissue. - View Dependent Claims (19, 20)
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Specification