Patent US6533807B2 successfully refreshed from Google Patents.
US6533807B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radially-expandable stent and delivery system
Assignee: Medtronic Inc
•
Filing: 1998-02-05
•
Granted: 2003-03-18
•
Expires: 2018-02-05
Abstract
Abstract The present invention provides radially-expandable stents that, in various embodiments, may reduce the bending stresses/strains associated with the compressed state of self-expanding stents and/or may prevent longitudinal expansion/contraction of radially expandable stents between the compressed and expanded states. In addition, stents according to the present invention preferably exhibit increased longitudinal flexibility in both the compressed and expanded states. The present invention also includes delivery systems in which threading of the guidewire through the delivery system may be simplified. In addition, the delivery systems according to the present invention may also incorporate a balloon to assist in radially expanding the stent and/or seating of the stent in the lumen during deployment without removing the stent delivery catheter. Further, the delivery systems may also include a support tube at the proximal end to assist in fixing the position of the stent relative to a guide catheter during deployment of the stent.
Inventors
- 👤 Lone Wolinsky
- 👤 Ofer Nativ
- 👤 Amir Loshakove
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:51
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2/90; A61F2/91; A61F2/915; A61F2/95; A61F2/962; A61F2/966; A61F2002/91533; A61F2002/9155; A61F2002/91583; A61F2230/00; A61F2230/0002; A61F2230/0028; A61F2230/0054; A61F2250/00; A61F2250/0014; A61F2250/0037
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
189 words
A self-expanding radially expandable stent for implantation within a body lumen comprising: an elongated generally tubular body defining a passageway having a longitudinal axis, the body comprising at least one circumferential support section having a length along the longitudinal axis; each of the circumferential support sections comprising a plurality of primary bends interconnected by struts, the primary bends being located on alternating ends of the support section around the circumference of the body, each of the struts connecting successive primary bends on opposite ends of the support section and having a midpoint generally located therebetween; wherein the stent is radially compressible into a compressed state and radially self-expanding into an expanded state in which the struts and primary bends in each of the support sections are arranged in a zigzag pattern, and further wherein each pair of adjacent struts associated with each of the primary bends abut at a point between the primary bend and the midpoint of each strut in the pair of adjacent struts when the stent is in the compressed state, whereby bending stress is reduced at each primary bend of the plurality of primary bends.
Claim 2
Dependent Claim
189 words
A self-expanding radially expandable stent for implantation within a body lumen comprising: an elongated generally tubular body defining a passageway having a longitudinal axis, the body comprising at least one circumferential support section having a length along the longitudinal axis; each of the circumferential support sections comprising a plurality of primary bends interconnected by struts, the primary bends being located on alternating ends of the support section around the circumference of the body, each of the struts connecting successive primary bends on opposite ends of the support section and having a midpoint generally located therebetween; wherein the stent is radially compressible into a compressed state and radially self-expanding into an expanded state in which the struts and primary bends in each of the support sections are arranged in a zigzag pattern, and further wherein each pair of adjacent struts associated with each of the primary bends abut at a point between the primary bend and the midpoint of each strut in the pair of adjacent struts when the stent is in the compressed state, whereby bending stress is reduced at each primary bend of the plurality of primary bends.
Claim 3
Dependent Claim
83 words
A stent according to claim 1 , wherein at least one of the struts in the pair of struts associated with each of the primary bends comprises a secondary bend located between the midpoint and one end of the strut, the secondary bend including an apex facing the other strut in the pair of struts, and further wherein the point at which the pair of struts abut is at the apex of the secondary bend when the stent is in the compressed state.
Claim 4
Dependent Claim
123 words
A stent according to claim 1 , wherein each strut of the plurality of struts comprises two secondary bends, one of the secondary bends located on each side of the midpoint of the strut and each of the secondary bends being spaced from the ends of the strut, each of the secondary bends having an apex, wherein the apexes of each of the secondary bends face the opposing struts in each pair of struts associated with one of the primary bends in the support section, and further wherein the point at which each pair of struts associated with one of the primary bends abut when the stent is in the compressed state is at the apexes of the secondary bends of the struts.
Claim 5
Dependent Claim
74 words
A stent according to claim 1 , wherein at least one of the struts in each pair of struts associated with one of the primary bends comprises a protrusion located between the midpoint and one end of the strut, the protrusion facing the other strut in the pair of struts, and further wherein the point at which the pair of struts abut is at the protrusion when the stent is in the compressed state.
Claim 6
Dependent Claim
102 words
A stent according to claim 1 , wherein each strut of the plurality of struts comprises two protrusions, one of the protrusions located on each side of the midpoint of the strut and each of the protrusions being spaced from the ends of the strut, wherein the protrusions face the opposing struts in each pair of struts associated with one of the primary bends in the support section, and further wherein the point at which each pair of struts associated with one of the primary bends abut when the stent is in the compressed state is at the protrusions in the struts.
Claim 7
Dependent Claim
19 words
A stent according to claim 1 , wherein all of the support sections are in phase with each other.
Claim 8
Dependent Claim
23 words
A stent according to claim 1 , wherein at least one pair of adjacent support sections are out of phase with each other.
Claim 9
Dependent Claim
190 words
A self-expanding radially expandable stent for implantation within a body lumen comprising: an elongated generally tubular body defining a passageway having a longitudinal axis, the body comprising at least one circumferential support section having a length along the longitudinal axis; each of the circumferential support sections comprising a substantially continuous element including a plurality of primary bends interconnected by struts, the primary bends being located on alternating ends of the support section around the circumference of the body, each of the struts connecting successive primary bends on opposite ends of the support section and having a midpoint generally located therebetween, wherein the stent is radially compressible into a compressed state and radially self-expanding into an expanded state in which the struts and primary bends in each of the support sections are arranged in a zigzag pattern; and means for reducing bending stress at the primary bends when the stent is in the compressed state, wherein the means for reducing bending stress causes each pair of struts associated with one of the primary bends to abut at a point between the midpoints of the pair of struts and the primary bend.
Claim 10
Dependent Claim
190 words
A self-expanding radially expandable stent for implantation within a body lumen comprising: an elongated generally tubular body defining a passageway having a longitudinal axis, the body comprising at least one circumferential support section having a length along the longitudinal axis; each of the circumferential support sections comprising a substantially continuous element including a plurality of primary bends interconnected by struts, the primary bends being located on alternating ends of the support section around the circumference of the body, each of the struts connecting successive primary bends on opposite ends of the support section and having a midpoint generally located therebetween, wherein the stent is radially compressible into a compressed state and radially self-expanding into an expanded state in which the struts and primary bends in each of the support sections are arranged in a zigzag pattern; and means for reducing bending stress at the primary bends when the stent is in the compressed state, wherein the means for reducing bending stress causes each pair of struts associated with one of the primary bends to abut at a point between the midpoints of the pair of struts and the primary bend.
Claim 11
Dependent Claim
65 words
A stent according to claim 8 , wherein the body comprises a plurality of circumferential support sections arranged successively along the longitudinal axis, and further wherein the body comprises at least one longitudinal member connecting adjacent support sections in the body, the longitudinal member having a first end attached to one of the support sections and a second end attached to the adjacent support section.
Claim 12
Dependent Claim
84 words
A stent according to claim 9 , wherein the first end of each of the longitudinal members is attached proximate the midpoint of one of the struts in one of the support sections and the second end of each of the longitudinal members is attached proximate the midpoint of one of the struts in an adjacent support section; wherein the longitudinal length of the stent in the compressed state is substantially the same as the longitudinal length of the stent in the expanded state.
Claim 13
Dependent Claim
377 words
A radially expandable stent for implantation within a body lumen comprising: an elongated generally tubular body defining a passageway having a longitudinal axis; the body comprising a plurality of circumferential support sections arranged successively along the longitudinal axis, each of the support sections having a length along the longitudinal axis; each of the circumferential support sections comprising a plurality of primary bends interconnected by struts, the primary bends being located on alternating ends of the support section around the circumference of the body, each of the struts connecting successive primary bends on opposite ends of the support section and having a midpoint generally located therebetween, wherein each primary bend of the plurality of primary bends connects a pair of struts in the support section, and further wherein each pair of struts abut at a point between the primary bend and the midpoint of each of the struts in the pair of struts when the stent is in a compressed state, whereby bending stress is reduced at each primary bend of the plurality of primary bends, and still further wherein at least one of the struts in each pair of struts associated with one of the primary bends comprises a secondary bend located between the midpoint and one end of the strut, the secondary bend including an apex facing the other strut in the pair of struts, and further wherein the point at which the pair of struts abut is at the apex of the secondary bend when the stent is in the compressed state; and at least one longitudinal member connecting adjacent support sections in the body, the longitudinal member having a first end attached proximate the midpoint of one of the struts and a second end attached proximate the midpoint of one of the struts in the adjacent support section; wherein the stent is radially compressible into the compressed state in which the struts are generally aligned with the longitudinal axis and radially expandable into an expanded state in which the struts and the primary bends in each of the support sections are arranged in a zigzag pattern, and further wherein the longitudinal length of the stent in the compressed state is substantially the same as the longitudinal length of the stent in the expanded state.
Claim 14
Dependent Claim
377 words
A radially expandable stent for implantation within a body lumen comprising: an elongated generally tubular body defining a passageway having a longitudinal axis; the body comprising a plurality of circumferential support sections arranged successively along the longitudinal axis, each of the support sections having a length along the longitudinal axis; each of the circumferential support sections comprising a plurality of primary bends interconnected by struts, the primary bends being located on alternating ends of the support section around the circumference of the body, each of the struts connecting successive primary bends on opposite ends of the support section and having a midpoint generally located therebetween, wherein each primary bend of the plurality of primary bends connects a pair of struts in the support section, and further wherein each pair of struts abut at a point between the primary bend and the midpoint of each of the struts in the pair of struts when the stent is in a compressed state, whereby bending stress is reduced at each primary bend of the plurality of primary bends, and still further wherein at least one of the struts in each pair of struts associated with one of the primary bends comprises a secondary bend located between the midpoint and one end of the strut, the secondary bend including an apex facing the other strut in the pair of struts, and further wherein the point at which the pair of struts abut is at the apex of the secondary bend when the stent is in the compressed state; and at least one longitudinal member connecting adjacent support sections in the body, the longitudinal member having a first end attached proximate the midpoint of one of the struts and a second end attached proximate the midpoint of one of the struts in the adjacent support section; wherein the stent is radially compressible into the compressed state in which the struts are generally aligned with the longitudinal axis and radially expandable into an expanded state in which the struts and the primary bends in each of the support sections are arranged in a zigzag pattern, and further wherein the longitudinal length of the stent in the compressed state is substantially the same as the longitudinal length of the stent in the expanded state.
Claim 15
Dependent Claim
417 words
A radially expandable stent for implantation within a body lumen comprising: an elongated generally tubular body defining a passageway having a longitudinal axis; the body comprising a plurality of circumferential support sections arranged successively along the longitudinal axis, each of the support sections having a length along the longitudinal axis; each of the circumferential support sections comprising a plurality of primary bends interconnected by struts, the primary bends being located on alternating ends of the support section around the circumference of the body, each of the struts connecting successive primary bends on opposite ends of the support section and having a midpoint generally located therebetween, wherein each primary bend of the plurality of primary bends connects a pair of struts in the support section, and further wherein each pair of struts abut at a point between the primary bend and the midpoint of each of the struts in the pair of struts when the stent is in a compressed state, whereby bending stress is reduced at each primary bend of the plurality of primary bends, and still further wherein each strut of the plurality of struts comprises two secondary bends, one of the secondary bends located on each side of the midpoint of the strut and each of the secondary bends being spaced from the ends of the strut, each of the secondary bends having an apex, wherein the apexes of each of the secondary bends face the opposing struts in each pair of struts associated with one of the primary bends in the support section, and further wherein the point at which each pair of struts associated with one of the primary bends abut when the stent is in the compressed state is at the apexes of the secondary bends of the struts; and at least one longitudinal member connecting adjacent support sections in the body, the longitudinal member having a first end attached proximate the midpoint of one of the struts and a second end attached proximate the midpoint of one of the struts in the adjacent support section; wherein the stent is radially compressible into the compressed state in which the struts are generally aligned with the longitudinal axis and radially expandable into an expanded state in which the struts and the primary bends in each of the support sections are arranged in a zigzag pattern, and further wherein the longitudinal length of the stent in the compressed state is substantially the same as the longitudinal length of the stent in the expanded state.
Claim 16
Dependent Claim
417 words
A radially expandable stent for implantation within a body lumen comprising: an elongated generally tubular body defining a passageway having a longitudinal axis; the body comprising a plurality of circumferential support sections arranged successively along the longitudinal axis, each of the support sections having a length along the longitudinal axis; each of the circumferential support sections comprising a plurality of primary bends interconnected by struts, the primary bends being located on alternating ends of the support section around the circumference of the body, each of the struts connecting successive primary bends on opposite ends of the support section and having a midpoint generally located therebetween, wherein each primary bend of the plurality of primary bends connects a pair of struts in the support section, and further wherein each pair of struts abut at a point between the primary bend and the midpoint of each of the struts in the pair of struts when the stent is in a compressed state, whereby bending stress is reduced at each primary bend of the plurality of primary bends, and still further wherein each strut of the plurality of struts comprises two secondary bends, one of the secondary bends located on each side of the midpoint of the strut and each of the secondary bends being spaced from the ends of the strut, each of the secondary bends having an apex, wherein the apexes of each of the secondary bends face the opposing struts in each pair of struts associated with one of the primary bends in the support section, and further wherein the point at which each pair of struts associated with one of the primary bends abut when the stent is in the compressed state is at the apexes of the secondary bends of the struts; and at least one longitudinal member connecting adjacent support sections in the body, the longitudinal member having a first end attached proximate the midpoint of one of the struts and a second end attached proximate the midpoint of one of the struts in the adjacent support section; wherein the stent is radially compressible into the compressed state in which the struts are generally aligned with the longitudinal axis and radially expandable into an expanded state in which the struts and the primary bends in each of the support sections are arranged in a zigzag pattern, and further wherein the longitudinal length of the stent in the compressed state is substantially the same as the longitudinal length of the stent in the expanded state.
Claim 17
Dependent Claim
368 words
A radially expandable stent for implantation within a body lumen comprising: an elongated generally tubular body defining a passageway having a longitudinal axis; the body comprising a plurality of circumferential support sections arranged successively along the longitudinal axis, each of the support sections having a length along the longitudinal axis; each of the circumferential support sections comprising a plurality of primary bends interconnected by struts, the primary bends being located on alternating ends of the support section around the circumference of the body, each of the struts connecting successive primary bends on opposite ends of the support section and having a midpoint generally located therebetween, wherein each primary bend of the plurality of primary bends connects a pair of struts in the support section, and further wherein each pair of struts abut at a point between the primary bend and the midpoint of each of the struts in the pair of struts when the stent is in a compressed state, whereby bending stress is reduced at each primary bend of the plurality of primary bends, and still further wherein at least one of the struts in each pair of struts associated with one of the primary bends comprises a protrusion located between the midpoint and one end of the strut, the protrusion facing the other strut in the pair of struts, and further wherein the point at which the pair of struts abut is at the protrusion when the stent is in the compressed state; and at least one longitudinal member connecting adjacent support sections in the body, the longitudinal member having a first end attached proximate the midpoint of one of the struts and a second end attached proximate the midpoint of one of the struts in the adjacent support section; wherein the stent is radially compressible into the compressed state in which the struts are generally aligned with the longitudinal axis and radially expandable into an expanded state in which the struts and the primary bends in each of the support sections are arranged in a zigzag pattern, and further wherein the longitudinal length of the stent in the compressed state is substantially the same as the longitudinal length of the stent in the expanded state.
Claim 18
Dependent Claim
368 words
A radially expandable stent for implantation within a body lumen comprising: an elongated generally tubular body defining a passageway having a longitudinal axis; the body comprising a plurality of circumferential support sections arranged successively along the longitudinal axis, each of the support sections having a length along the longitudinal axis; each of the circumferential support sections comprising a plurality of primary bends interconnected by struts, the primary bends being located on alternating ends of the support section around the circumference of the body, each of the struts connecting successive primary bends on opposite ends of the support section and having a midpoint generally located therebetween, wherein each primary bend of the plurality of primary bends connects a pair of struts in the support section, and further wherein each pair of struts abut at a point between the primary bend and the midpoint of each of the struts in the pair of struts when the stent is in a compressed state, whereby bending stress is reduced at each primary bend of the plurality of primary bends, and still further wherein at least one of the struts in each pair of struts associated with one of the primary bends comprises a protrusion located between the midpoint and one end of the strut, the protrusion facing the other strut in the pair of struts, and further wherein the point at which the pair of struts abut is at the protrusion when the stent is in the compressed state; and at least one longitudinal member connecting adjacent support sections in the body, the longitudinal member having a first end attached proximate the midpoint of one of the struts and a second end attached proximate the midpoint of one of the struts in the adjacent support section; wherein the stent is radially compressible into the compressed state in which the struts are generally aligned with the longitudinal axis and radially expandable into an expanded state in which the struts and the primary bends in each of the support sections are arranged in a zigzag pattern, and further wherein the longitudinal length of the stent in the compressed state is substantially the same as the longitudinal length of the stent in the expanded state.
Claim 19
Dependent Claim
395 words
A radially expandable stent for implantation within a body lumen comprising: an elongated generally tubular body defining a passageway having a longitudinal axis; the body comprising a plurality of circumferential support sections arranged successively along the longitudinal axis, each of the support sections having a length along the longitudinal axis; each of the circumferential support sections comprising a plurality of primary bends interconnected by struts, the primary bends being located on alternating ends of the support section around the circumference of the body, each of the struts connecting successive primary bends on opposite ends of the support section and having a midpoint generally located therebetween, wherein each primary bend of the plurality of primary bends connects a pair of struts in the support section, and further wherein each pair of struts abut at a point between the primary bend and the midpoint of each of the struts in the pair of struts when the stent is in a compressed state, whereby bending stress is reduced at each primary bend of the plurality of primary bends, and still further wherein each strut of the plurality of struts comprises two protrusions, one of the protrusions located on each side of the midpoint of the strut and each of the protrusions being spaced from the ends of the strut, wherein the protrusions face the opposing struts in each pair of struts associated with one of the primary bends in the support section, and further wherein the point at which each pair of struts abut when the stent is in the compressed state is at the protrusions in each strut in the pair of adjacent struts; and at least one longitudinal member connecting adjacent support sections in the body, the longitudinal member having a first end attached proximate the midpoint of one of the struts and a second end attached proximate the midpoint of one of the struts in the adjacent support section; wherein the stent is radially compressible into the compressed state in which the struts are generally aligned with the longitudinal axis and radially expandable into an expanded state in which the struts and the primary bends in each of the support sections are arranged in a zigzag pattern, and further wherein the longitudinal length of the stent in the compressed state is substantially the same as the longitudinal length of the stent in the expanded state.
Claim 20
Dependent Claim
395 words
A radially expandable stent for implantation within a body lumen comprising: an elongated generally tubular body defining a passageway having a longitudinal axis; the body comprising a plurality of circumferential support sections arranged successively along the longitudinal axis, each of the support sections having a length along the longitudinal axis; each of the circumferential support sections comprising a plurality of primary bends interconnected by struts, the primary bends being located on alternating ends of the support section around the circumference of the body, each of the struts connecting successive primary bends on opposite ends of the support section and having a midpoint generally located therebetween, wherein each primary bend of the plurality of primary bends connects a pair of struts in the support section, and further wherein each pair of struts abut at a point between the primary bend and the midpoint of each of the struts in the pair of struts when the stent is in a compressed state, whereby bending stress is reduced at each primary bend of the plurality of primary bends, and still further wherein each strut of the plurality of struts comprises two protrusions, one of the protrusions located on each side of the midpoint of the strut and each of the protrusions being spaced from the ends of the strut, wherein the protrusions face the opposing struts in each pair of struts associated with one of the primary bends in the support section, and further wherein the point at which each pair of struts abut when the stent is in the compressed state is at the protrusions in each strut in the pair of adjacent struts; and at least one longitudinal member connecting adjacent support sections in the body, the longitudinal member having a first end attached proximate the midpoint of one of the struts and a second end attached proximate the midpoint of one of the struts in the adjacent support section; wherein the stent is radially compressible into the compressed state in which the struts are generally aligned with the longitudinal axis and radially expandable into an expanded state in which the struts and the primary bends in each of the support sections are arranged in a zigzag pattern, and further wherein the longitudinal length of the stent in the compressed state is substantially the same as the longitudinal length of the stent in the expanded state.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2006-03-17 | 2006-09-16 | 2007-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-03-17 | 2010-09-16 | 2011-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-03-17 | 2014-09-16 | 2015-03-18 | $7700.00 | Window Closed / Lapsed |