US20030139799A1 — Multi-layer stent

Claim 1

Independent Claim 103 words

1 . A stent having a reduced state and an expanded state, and further having longitudinal axis therethrough, the stent comprising at least one serpentine segment having a proximal end and a distal end, the serpentine segment comprising a plurality of peaks and troughs, in the reduced state a plurality of first peaks disposed at a first distance from a longitudinal axis of the stent and a plurality of second peaks disposed at a second distance from the longitudinal axis of the stent, the second distance less than the first distance, the first peaks defining a substantially cylindrical outer surface of the segment.

Claim 2

Dependent Claim 103 words

1 . A stent having a reduced state and an expanded state, and further having longitudinal axis therethrough, the stent comprising at least one serpentine segment having a proximal end and a distal end, the serpentine segment comprising a plurality of peaks and troughs, in the reduced state a plurality of first peaks disposed at a first distance from a longitudinal axis of the stent and a plurality of second peaks disposed at a second distance from the longitudinal axis of the stent, the second distance less than the first distance, the first peaks defining a substantially cylindrical outer surface of the segment.

Claim 3

Dependent Claim 65 words

2 . The stent of claim 1 wherein the plurality of peaks further include third peaks, the first peaks, second peaks and third peaks arranged in a regular alternating pattern about the longitudinal axis, in the reduced state the third peaks disposed at a third distance from the longitudinal axis of the stent, the third distance less than the first distance and the second distance.

Claim 4

Dependent Claim 70 words

3 . The stent of claim 2 wherein the plurality of peaks further include fourth peaks, the first peaks, second peaks, third peaks and fourth peaks arranged in a regular alternating pattern about the longitudinal axis, in the reduced state the fourth peaks disposed at a fourth distance from the longitudinal axis of the stent, the fourth distance less than the first distance, the second distance and the third distance.

Claim 5

Dependent Claim 26 words

4 . The stent of claim 1 wherein in the expanded state, the first and second peaks are equidistant from the longitudinal axis of the stent.

Claim 6

Dependent Claim 64 words

5 . The stent of claim 1 wherein the troughs include first troughs and second troughs arranged in a regular alternating pattern about the longitudinal axis, the first troughs disposed at a first distance from the longitudinal axis of the stent, the second troughs disposed at a second distance from the longitudinal axis of the stent, the second distance different from the first distance.

Claim 7

Dependent Claim 84 words

6 . The stent of claim 2 wherein the troughs include first troughs, second troughs and third troughs arranged in a regular alternating pattern about the longitudinal axis, the first troughs disposed at a first distance from the longitudinal axis of the stent, the second troughs disposed at a second distance from the longitudinal axis of the stent, the third troughs disposed at a third distance from the longitudinal axis of the stent, the first distance different from the second distance and third distance.

Claim 8

Dependent Claim 29 words

7 . The stent of claim 6 wherein the first distance is different from the second distance and third distance, the second distance is different than the third distance.

Claim 9

Dependent Claim 13 words

8 . The stent of claim 1 comprising a plurality of serpentine segments.

Claim 10

Dependent Claim 21 words

9 . The stent of claim 8 wherein serpentine segments which are adjacent one another are connected one to the other.

Claim 11

Dependent Claim 20 words

10 . The stent of claim 1 wherein the second peaks define a substantially cylindrical inner surface of the segment.

Claim 12

Dependent Claim 27 words

11 . The stent of claim 10 wherein the substantially cylindrical inner surface of the segment tapers outward toward the substantially cylindrical outer surface of the segment.

Claim 13

Dependent Claim 141 words

12 . A tubular stent having a longitudinal axis therethrough, the stent comprising at least one segment having a proximal end and a distal end, the distal end comprising a plurality of distal closed portions and distal open portions alternating with one another, the distal closed portions including first distal closed portions disposed at a first distance from the longitudinal axis of the stent and second distal closed portions disposed at a second distance from the longitudinal axis of the stent, the second distance less than the first distance, the first and second distal closed portions arranged in a regular alternating pattern about the longitudinal axis of the stent, the first distal closed portions defining a substantially cylindrical outer surface of the segment, the proximal end comprising a plurality of proximal closed portions and proximal open portions alternating with one another.

Claim 14

Dependent Claim 141 words

12 . A tubular stent having a longitudinal axis therethrough, the stent comprising at least one segment having a proximal end and a distal end, the distal end comprising a plurality of distal closed portions and distal open portions alternating with one another, the distal closed portions including first distal closed portions disposed at a first distance from the longitudinal axis of the stent and second distal closed portions disposed at a second distance from the longitudinal axis of the stent, the second distance less than the first distance, the first and second distal closed portions arranged in a regular alternating pattern about the longitudinal axis of the stent, the first distal closed portions defining a substantially cylindrical outer surface of the segment, the proximal end comprising a plurality of proximal closed portions and proximal open portions alternating with one another.

Claim 15

Dependent Claim 18 words

13 . The stent of claim 12 expandable from a first unexpanded configuration to a second expanded configuration.

Claim 16

Dependent Claim 28 words

14 . The stent of claim 13 wherein in the expanded configuration, the first and second distal closed portions are equidistant from the longitudinal axis of the stent.

Claim 17

Dependent Claim 22 words

15 . The stent of claim 13 wherein the first and second distal closed portions alternate with one another about the segment.

Claim 18

Dependent Claim 74 words

16 . The stent of claim 12 wherein the proximal closed portions include first proximal closed portions disposed at a first distance from the longitudinal axis of the stent and second proximal closed portions disposed at a second distance from the longitudinal axis of the stent, the second distance different from the first distance, the first and second proximal closed portions arranged in a regular pattern relative to the longitudinal axis of the stent.

Claim 19

Dependent Claim 12 words

17 . The stent of claim 12 wherein the segment is serpentine.

Claim 20

Dependent Claim 18 words

18 . The stent of claim 12 wherein the segment includes a plurality of cells with openings therethrough.

Claim 21

Dependent Claim 21 words

19 . The stent of claim 14 wherein the second closed portions define a substantially cylindrical inner surface of the segment.

Claim 22

Dependent Claim 27 words

20 . The stent of claim 19 wherein the substantially cylindrical inner surface of the segment tapers outward toward the substantially cylindrical outer surface of the segment.

Claim 23

Dependent Claim 112 words

21 . A stent expandable from a first unexpanded configuration to a second expanded configuration and having a longitudinal axis therethrough, the stent comprising: at least one segment having a proximal region and a distal region, the distal region comprising a plurality of distal closed portions, the proximal region comprising a plurality of proximal closed regions; and a plurality of struts extending between the distal region and the proximal region, in the first unexpanded configuration the plurality of struts being a first distance from the longitudinal axis, and in the second expanded configuration the struts being a second distance from the longitudinal axis, the first distance being less than the second distance.

Claim 24

Dependent Claim 112 words

21 . A stent expandable from a first unexpanded configuration to a second expanded configuration and having a longitudinal axis therethrough, the stent comprising: at least one segment having a proximal region and a distal region, the distal region comprising a plurality of distal closed portions, the proximal region comprising a plurality of proximal closed regions; and a plurality of struts extending between the distal region and the proximal region, in the first unexpanded configuration the plurality of struts being a first distance from the longitudinal axis, and in the second expanded configuration the struts being a second distance from the longitudinal axis, the first distance being less than the second distance.

Claim 25

Dependent Claim 47 words

22 . The stent of claim 21 wherein the distal region further comprises a plurality of distal open portions alternating arranged with the distal closed portions and the proximal region further comprises a plurality of proximal closed portions and proximal open portions alternating arranged with one another.

Claim 26

Dependent Claim 27 words

23 . The stent of claim 21 wherein the struts define a substantially cylindrical inner surface of the segment when the stent is in the unexpanded configuration.

Claim 27

Dependent Claim 45 words

24 . The stent of claim 21 comprising a plurality of first struts and a plurality of second struts, each distal closed portion having one first strut extending therefrom to one proximal closed portion and one second strut extending therefrom to another proximal closed portion.

Claim 28

Dependent Claim 12 words

25 . The stent of claim 21 wherein the segment is serpentine.

Claim 29

Dependent Claim 24 words

26 . The stent of claim 21 wherein the distal closed portions and proximal closed portions include a plurality of cells with openings therethrough.

Claim 30

Dependent Claim 23 words

27 . The stent of claim 21 comprising a plurality of segments, segments which are adjacent one another and connected to one another.

Claim 31

Dependent Claim 92 words

28 . An expandable stent having a longitudinal axis therethrough, the stent comprising a plurality of cylindrical segments, each segment formed of a plurality of interconnected struts, the cylindrical segments including a first cylindrical segment and a second cylindrical segment connected to the first segment, at least a portion of the first segment and at least a portion of the second segment in overlapping relationship when the stent is in an unexpended state, and the first and second segments are in a non-overlapping relationship when the stent is in an expanded state.

Claim 32

Dependent Claim 92 words

28 . An expandable stent having a longitudinal axis therethrough, the stent comprising a plurality of cylindrical segments, each segment formed of a plurality of interconnected struts, the cylindrical segments including a first cylindrical segment and a second cylindrical segment connected to the first segment, at least a portion of the first segment and at least a portion of the second segment in overlapping relationship when the stent is in an unexpended state, and the first and second segments are in a non-overlapping relationship when the stent is in an expanded state.

Claim 33

Dependent Claim 37 words

29 . The stent of claim 28 further comprising a third cylindrical segment at least a portion of which is in overlapping relationship with at least a portion of the second cylindrical segment in the unexpanded state.

Claim 34

Dependent Claim 39 words

30 . The stent of claim 29 further comprising a plurality of cylindrical segment at least a portion of each cylindrical segment in overlapping relationship with at least a portion of an adjacent cylindrical segment in the unexpanded state.

Claim 35

Dependent Claim 23 words

31 . The stent of claim 30 wherein cylindrical segments which are adjacent one another are in overlapping relationship in the unexpanded state.

Claim 36

Dependent Claim 16 words

32 . The stent of claim 30 wherein the first and second cylindrical segments are serpentine.

Claim 37

Dependent Claim 32 words

33 . The stent of claim 30 wherein the first cylindrical segment comprises a plurality of cells with openings therethrough and the second segment comprises a plurality of cells with openings therethrough.

Claim 38

Dependent Claim 17 words

34 . The stent of claim 30 wherein the cylindrical segments are disposed in a herringbone pattern.

Claim 39

Dependent Claim 37 words

35 . The stent of claim 30 wherein the first cylindrical segment is characterized by a first radius and the second cylindrical segment is characterized by a second radius, the second radius smaller than the first radius.

Claim 40

Dependent Claim 16 words

36 . A stent comprising a plurality of segments which are disposed in a herringbone pattern.

Claim 41

Dependent Claim 16 words

36 . A stent comprising a plurality of segments which are disposed in a herringbone pattern.

Multi-layer stent

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag