Vena cava filter delivery system
DCFirst Claim
1. A method for delivery of self-expanding vena cava filter having a radially extending penetrating portion, said method comprising the steps of:
- A) positioning an impervious, relatively short segment in a distal section of a radially flexible, axially stiff elongated tube,B) positioning the vena cava filter in the distal section of the tube with the segment interposed between the penetrating portions of the filter and the tube;
C) urging the distal section of the tube to a delivery site with a distal end of the tube positioned proximate the delivery site such that during said step of urging the distal section the distal end of the tube remains relatively radially flexible therealong with the segment overlying the penetrating portions; and
D) urging the filter distally with respect to said tube to move the filter through an aperture in the distal end of the tube and thereby to deploy the filter at the delivery site.
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Litigations
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Accused Products
Abstract
A delivery system for delivery and deployment of devices having abrading portions within a patient'"'"'s lumen. A lumen in a flexible catheter that extends proximally from a distal end of the catheter receives the device in a compact form. At least one impervious segment positioned in the lumen overlies the abrading portions of the device to shield and buffer the surface of the lumen from the abrading portions. The segment is of a relatively short length so that the catheter remains relatively flexible therealong to enable relative ease in the transit of the catheter through the patient'"'"'s lumen to a delivery site. Additional segments may be disposed in the catheter distally of the segment or the segment may move with the device to the distal end to buffer the walls of the catheter during the deployment of the device. Additional segments mate with the segment so that engaged ones of the segments are relatively radial deflectable.
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Citations
30 Claims
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1. A method for delivery of self-expanding vena cava filter having a radially extending penetrating portion, said method comprising the steps of:
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A) positioning an impervious, relatively short segment in a distal section of a radially flexible, axially stiff elongated tube, B) positioning the vena cava filter in the distal section of the tube with the segment interposed between the penetrating portions of the filter and the tube; C) urging the distal section of the tube to a delivery site with a distal end of the tube positioned proximate the delivery site such that during said step of urging the distal section the distal end of the tube remains relatively radially flexible therealong with the segment overlying the penetrating portions; and D) urging the filter distally with respect to said tube to move the filter through an aperture in the distal end of the tube and thereby to deploy the filter at the delivery site. - View Dependent Claims (2, 3, 4, 5, 9, 10, 11, 12, 13, 14)
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6. A delivery system for the percutaneous insertion of a self-expanding vena cava filter being formed with a length along a longitudinal filter axis, said system comprising
an elongated, radially flexible and axially stiff tubular member extending proximally from a distal end and having a distal end section, a segment carried in said distal end section for constraining the filter in a compact condition substantially coaxially with said tubular member, said segment being relatively short compared to the axial length of the filter and having an inner surface that resists penetration by the filter thereby to protect said tubular member from damage during transport of the filter, and control means attached to said tubular member for displacing the filter from said segment thereby to deploy the filter.
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23. A delivery system for delivering to a delivery site in a compact form a self-expansible vena cava filter with exposed penetrating surfaces and for selectively deploying the filter at the delivery site, said system comprising:
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A) catheter means extending proximally along an axis from a proximal end to a distal end of said system, said catheter means positioning said distal end at the delivery site, said catheter means being radially flexible and having an internal lumen with a lumen surface for receiving and housing the filter proximate said distal end for transport to and deployment at the delivery site; B) retaining means in said internal lumen of said catheter means for overlying the penetrating surfaces of the filter thereby to shield said catheter means from the exposed penetrating surfaces and for enabling a radial flexion of said catheter means therealong during transport of the filter by said delivery system, said retaining means including a tubular metal segment coaxially positioned in said internal lumen of said catheter means and interposed between said lumen surface of said catheter means and the penetrating portions of the filter during transport thereof through the patient'"'"'s lumen; and C) control means extending from a proximal end of the system through said catheter means to said retaining means for selectively deploying the device. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30)
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Specification