Locking stent
First Claim
Patent Images
1. A stent having a proximal end and a distal end, the stent comprising a plurality of interconnected cells, at least one of the interconnected cells being a lockable cell, the lockable cell including;
- a first locking member and a second locking member disposed opposite the first member, the first and second locking members movable between a first position in which they do not lock with one another to a position in which they lock with one another;
wherein the first locking member is a pincer member comprising a first arm and a second arm, and the second locking member is a tongue, the first arm and the second arm moving toward one another to grip the tongue on expansion of the stent.
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Accused Products
Abstract
A stent may be constructed to have at least one lockable cell which includes a first locking member and a second locking member. The first and second locking members are movable between a first position in which they are not locked together to a second position in which they are locked together and impart increased scaffolding strength to the stent.
348 Citations
44 Claims
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1. A stent having a proximal end and a distal end, the stent comprising a plurality of interconnected cells, at least one of the interconnected cells being a lockable cell, the lockable cell including;
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a first locking member and a second locking member disposed opposite the first member, the first and second locking members movable between a first position in which they do not lock with one another to a position in which they lock with one another;
whereinthe first locking member is a pincer member comprising a first arm and a second arm, and the second locking member is a tongue, the first arm and the second arm moving toward one another to grip the tongue on expansion of the stent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
at least one proximal lockable cell in which the pincer member is situated at a proximal end of the cell and the tongue is situated at the distal end of the cell; - and
at least one distal lockable cell in which the pincer member is situated at a distal end of the cell and the tongue is situated at the proximal end of the cell.
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8. The stent of claim 1 wherein the lockable cell is a multiply lockable cell comprising a plurality of pincer members and a plurality of tongues.
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9. The stent of claim 8 wherein one of the pincer members is situated at a distal end of the cell and one of the pincer members is located at a proximal end of the cell.
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10. The stent of claim 9 comprising a plurality of multiply lockable cells.
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11. The stent of claim 1, the lockable cell comprising a plurality of pincer members including
a first pincer member comprising a first arm and a second arm and a tongue disposed between the first arm and the second arm and a second pincer member comprising a first arm and a second arm, the first pincer member situated opposite the second pincer member, wherein the first and second arms of the second pincer member grip the tongue of the first pincer member on expansion of the stent and the first and second arms of the second pincer member grips the first pincer member of the stent. -
12. The stent of claim 1 wherein the lockable cell includes a serpentine shaped proximal end, a serpentine shaped distal end, a first sidewall extending between the serpentine shaped proximal end and the serpentine shaped distal end, and a second sidewall extending between the serpentine shaped proximal end and the serpentine shaped distal end, the tongue and the pincer member disposed between the first sidewall and the second sidewall.
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13. The stent of claim 1 wherein the first locking member is an interlocking member and the second locking member is an interlocking member, the first and second interlocking members constructed and arranged to interlock with one another upon expansion of the stent.
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14. A stent having a proximal end and a distal end, the stent comprising a plurality of interconnected cells, at least one of the interconnected cells being a lockable cell, the lockable cell including;
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a first locking member and a second locking member disposed opposite the first member, the first and second locking members movable between a first position in which they do not lock with one another to a position in which they lock with one another;
the first locking member is a pincer member comprising a first arm and a second arm and the second locking member is a tongue, the first and second arms disposed in a first position in which they do not grip the tongue and movable between the first position and a second position in which they grip the tongue, the tongue including a narrow neck portion and a wider head portion.
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15. A stent comprised of a plurality of interconnected bands,
at least one of the interconnected bands having a first locking member extending therefrom toward an adjacent band, a second locking member extending from an adjacent band, the first and second locking members movable from a first position in which they do not lock with one another to a second position in which they lock with one another; - wherein
the first locking member is a pincer member comprising a first arm and a second arm, and the second locking member is a tongue, the first arm and the second arm moving toward one another to grip the tongue on expansion of the stent. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
each pincer member having a first arm and a second arm, the adjacent band having a plurality of tongues extending therefrom, the first and second arms of each pincer member movable between a first position in which they are not in contact with one of the tongues and a second position in which they grip one of the tongues. -
21. The stent of claim 16, wherein a plurality of bands each have at least one pincer member extending therefrom toward a tongue extending from an adjacent band.
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22. The stent of claim 15 wherein the bands extend circumferentially.
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23. The stent of claim 15 wherein the bands extend longitudinally.
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24. The stent of claim 15 wherein the bands extend helically.
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25. The stent of claim 16 the adjacent band comprising a second pincer member which comprises a first arm and a second arm, the tongue disposed between the first and second arms of the second pincer member,
the first pincer member situated opposite the second pincer member, wherein the first and second arms of the second pincer member grip the tongue of the first pincer member on expansion of the stent and the first and second arms of the second pincer member grips the first pincer member of the stent. -
26. The stent of claim 15 wherein the first locking member is a first interlocking member and the second locking member is a second interlocking member, the first and second interlocking members constructed and arranged to interlock with one another upon expansion of the stent.
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27. A stent comprised of a plurality of interconnected bands,
at least one of the interconnected bands having a first locking member extending therefrom toward an adjacent band, a second locking member extending from an adjacent band, the first and second locking members movable from a first position in which they do not lock with one another to a second position in which they lock with one another, the first locking member is a pincer member having a first arm and a second arm and the second locking member is a tongue extending from the adjacent band, the first and second arms gripping the tongue in the second position, the tongue including a narrow neck portion and a wider head portion.
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28. A stent having a proximal end and a distal end, the stent comprising a plurality of interconnected cells, at least one of the interconnected cells being a lockable cell, the
lockable cell including a first locking member and a second locking member, the second locking member constructed and arranged to lockingly engage the first locking member on expansion of the stent, wherein the first locking member is a pincer member comprising a first arm and a second arm, and the second locking member is a tongue, the first arm and the second arm moving toward one another to grip the tongue on expansion of the stent.
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37. An unexpanded stent comprised of a plurality of connected bands
at least one of the bands having a first locking member extending therefrom toward an adjacent band, the adjacent band having a second locking member, the second locking member lockingly engaging the first locking member when the stent is in an expanded state, wherein the first locking member is a pincer member comprising a first arm and a second arm, and the second locking member is a tongue, the first arm and the second arm moving toward one another to grip the tongue on expansion of the stent.
Specification