Patent EP0857471A2 successfully refreshed from Google Patents.
EP0857471A2
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EP
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Stent for expanding body's lumen
Assignee: SONG, HO YOUNG
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Filing: 1998-02-04
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Granted: —
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Expires: 2018-02-04
Abstract
Abstract A stent for expanding a lumen of a body having a structural stability along the length of the stent, as well as a good expandable force. According to one embodiment of the present invention, the stent is made of a single length of a filament and comprises zigzag sections, in which the filament is wound in a zigzag manner, disposed on both end portions of the stent; and a spiral section, in which the filament is wound in a spiral manner, disposed between the zigzag sections. The zigzag section comprised a plurality of bands. Each of the bands includes a series of straight portions, peak portions, and valley portions, the peak and valley portions being integrally engaged with the straight portions, and each of the bands is disposed along a circumferential direction of the stent on a plane substantially perpendicular to a longitudinal axis thereof; and each valley portion of the bands is twisted with a peak portion of an adjacent band. Also, the spiral section comprises a body portion formed in such a way that the filament crosses in a spiral pattern to form a plurality of segments with the filament being not engaged with each other, and upper and lower end portions having a plurality of bent points.
Inventors
- 👤 Sung Soon An
- 👤 Chel Seng Kim
- 👤 Sung Pil Choi
- 👤 Tae Hyung Kim
- 👤 Ho Young Song
- 👤 Sang Woo Song
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 17:33
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2/90; D; D04; D04C; D04C1/00; D04C1/06; D04C1/08; D04G; D04G1/00; D04G1/02; D04G1/06; A61F2/0077; A61F2/02; A61F2/04; A61F2/06; A61F2/07; A61F2/848; A61F2002/8486; A61F2/95; A61F2002/9528; A61F2230/00; A61F2230/0002; A61F2230/0028; A61F2230/0054; A61F2230/0063; A61F2230/0073; A61F2230/0078; D10; D10B; D10B2509/00; D10B2509/06
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
119 words
A stent for expanding a lumen of a body, the stent being
made up of a single length of a filament and including a
plurality of bands formed in a zigzag pattern, wherein: each of the bands includes a series of straight portions,
peak portions, and valley portions, the peak and valley portions
being integrally engaged with the straight portions, and each of
the bands is disposed along a circumferential direction of the
stent on a plane substantially perpendicular to a longitudinal
axis thereof; each valley portion of the bands is twisted with a peak
portion of an adjacent band; and an initial portion of the filament is an extension from a
last straight portion of previous adjacent band.
Claim 2
Dependent Claim
40 words
The stent as claimed in claim 1, wherein upper and lower end
portions of the stent have a flare shape in which a diameter is
increased toward a distal end thereof to prevent the stent from
migrating inside the lumen.
Claim 3
Dependent Claim
28 words
The stent as claimed in claim 1, wherein the upper and lower
end portions of the stent have a larger diameter than a middle
portion of the stent.
Claim 4
Dependent Claim
16 words
The stent as claimed in claim 1, wherein the filament is
made of a Ni-Ti alloy.
Claim 5
Dependent Claim
18 words
The stent as claimed in claim 1, wherein the stent is
covered or wrapped with a flexible material.
Claim 6
Dependent Claim
25 words
The stent as claimed in claim 1, further comprising on one
end thereof a retrieving member by which the stent is removed
from the lumen.
Claim 7
Dependent Claim
24 words
The stent as claimed in claim 6, wherein the retrieving
member comprises a plurality of wires attached to the one end of
the stent.
Claim 8
Dependent Claim
129 words
A stent for expanding a lumen of a body, the stent being
made of a single length of a filament, the stent comprising: a body portion formed in such a way that the filament
crosses in a spiral pattern to form a plurality of segments with
the segments being not engaged with each other; and upper and lower end portions having a plurality of bent
points; wherein the number of the bent points of the upper end
portion is equal with the number of the bent points of the lower
end portion, and any one segment passes alternately on and under
other segments which are wound along a longitudinal axis of the
stent in a spiral direction so that cross points of the segments
form a plurality of meshes.
Claim 9
Dependent Claim
41 words
The stent as claimed in claim 8, wherein the upper and lower
end portions of the stent have a flare shape in which a diameter
is increased toward a distal end thereof to prevent the stent
from migrating inside the lumen.
Claim 10
Dependent Claim
28 words
The stent as claimed in claim 8, wherein the upper and lower
end portions of the stent have a larger diameter than a middle
portion of the stent.
Claim 11
Dependent Claim
16 words
The stent as claimed in claim 8, wherein the filament is
made of a Ni-Ti alloy.
Claim 12
Dependent Claim
18 words
The stent as claimed in claim 8, wherein the stent is
covered or wrapped with a flexible material.
Claim 13
Dependent Claim
24 words
The stent as claimed in claim 8, further comprising on one
end a retrieving member by which the stent is removed from the
lumen.
Claim 14
Dependent Claim
24 words
The stent as claimed in claim 13, wherein the retrieving
member comprises a plurality of wires attached to the one end of
the stent.
Claim 15
Dependent Claim
62 words
A stent for expanding a lumen of a body, the stent being
made of a single length of a filament, the stent comprising: zigzag sections, in which the filament is wound in a zigzag
manner, disposed on both end portions of the stent; and a spiral section, in which the filament is wound in a spiral
manner, disposed between the zigzag sections.
Claim 16
Dependent Claim
18 words
The stent as claimed in claim 15, wherein each of the zigzag
sections comprises a plurality of bands.
Claim 17
Dependent Claim
76 words
The stent as claimed in claim 16, wherein each of the bands
includes a series of straight portions, peak portions, and valley
portions, the peak and valley portions being integrally engaged
with the straight portions, and each of the bands is disposed
along a circumferential direction of the stent on a plane
substantially perpendicular to a longitudinal axis thereof; and
each valley portion of the bands is twisted with a peak portion
of an adjacent band.
Claim 18
Dependent Claim
55 words
The stent as claimed in claim 15, wherein the spiral section
comprises: a body portion formed in such a way that the filament
crosses in a spiral pattern to form a plurality of segments with
the filament being not engaged with each other; and upper and lower end portions having a plurality of bent
points.
Claim 19
Dependent Claim
21 words
The stent as claimed in claim 15, further comprising a
zigzag section formed in a middle portion of the spiral section.
Claim 20
Dependent Claim
38 words
The stent as claimed in claim 15, wherein the end portions
of the stent have a flare shape in which a diameter is increased
toward a distal end thereof to prevent the stent from migrating
inside the lumen.
Claim 21
Dependent Claim
25 words
The stent as claimed in claim 15, wherein the end portions
of the stent have a larger diameter than a middle portion of the
stent.
Claim 22
Dependent Claim
16 words
The stent as claimed in claim 15, wherein the filament is
made of a Ni-Ti alloy.
Claim 23
Dependent Claim
18 words
The stent as claimed in claim 15, wherein the stent is
covered or wrapped with a flexible material.
Claim 24
Dependent Claim
24 words
The stent as claimed in claim 15, further comprising on one
end a retrieving member by which the stent is removed from the
lumen.
Claim 25
Dependent Claim
24 words
The stent as claimed in claim 24, wherein the retrieving
member comprises a plurality of wires attached to the one end of
the stent.
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