EP0365993A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Catheter equipped with expansible member and method of manufacturing the same
Assignee: Terumo Corp
•
Filing: 1989-10-18
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Granted: —
•
Expires: 2009-10-18
Abstract
Abstract A catheter equipped with an expansible member (3) according to the present invention comprises a first lumen (4) whose tip is open, a second lumen whose tip is closed, a foldable expansible member (3) communicating with the second lumen (6), and a rigidity imparting member (13) consisting of a linear member extending in the axial direction disposed in the second lumen. Therefore, an extreme flection or bend of the catheter is prevented without decrease of the flexibility of the catheter, especially the elastic deformability in the lateral direction with respect to the axial direction of the catheter. Thus, the force applied to the base end portion of the catheter for advancing the tip end portion thereof is surely transmitted to the tip end portion. Further, a catheter equipped with an expansible member according to the present invention comprises a first lumen whose tip is open, a second lumen whose tip is closed, and a foldable expansible member communicating with the second lumen, the outer diameter of the tip end portion of the catheter including a portion to which the expansible member is attached is smaller than that of the base end portion of the catheter. Therefore, the tip end portion of the catheter can be inserted into a severer stricture portion or in a more peripheral blood vessel. Further, a catheter equipped with an expansible member according to the present invention comprises a first lumen whose tip is open, a second lumen whose tip is closed, and a foldable expansible member communicating with the second lumen, the tip of the expansible member forming the tip of the catheter. Therefore, the expansible member is prevented from peeling off and the tip end of the catheter is prevented from being an injury to the inner wall of a blood vessel when the catheter advances in the blood vessel.
Inventors
- 👤 Yoshiaki C/O Terumo K.K. Sugiyama
- 👤 Kyuta C/O Terumo K.K. Sagae
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 04:05
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0009; A61M25/001; A61M25/10; A61M25/1027; A61M25/1036; A61M25/104; B; B29; B29C; B29C57/00; B29C65/00; B29C65/02; B29C65/18; B29C65/24; B29C65/30; B29C65/305; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/116; B29C66/1162; B29C66/12; B29C66/122; B29C66/1222; B29C66/1224; B29C66/128; B29C66/1282; B29C66/1284; B29C66/12841; B29C66/13; B29C66/131; B29C66/1312; B29C66/50; B29C66/51; B29C66/52; B29C66/522; B29C66/5224; B29C66/53; B29C66/532; B29C66/5324; B29C66/53241; B29C66/534; B29C66/5344; B29C66/63; B29C66/80; B29C66/81; B29C66/818; B29C66/8181; A61M2025/0004; A61M2025/1043; A61M2025/1079; A61M25/1029; A61M25/1034; B29C65/26; B29C66/70; B29C66/71; B29L; B29L2022/00; B29L2022/02; B29L2022/022; B29L2031/00; B29L2031/753; B29L2031/7542
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
193 words
A catheter equipped with an expansible member comprising an inner tube having a base end portion and a first lumen whose tip is open; an outer tube capable of inserting said inner tube therein, having a base end portion and the tip thereof at a position recessed by a predetermined distance from the tip of said inner tube, and forming a second lumen between it and the outer surface of said inner tube; a foldable expansible member having a tip end portion and a base end portion, said tip end portion of said expansible member being attached to said inner tube, said base end portion of said expansible member being attached to said outer tube, said expansible member communicating with said second lumen at a portion near said base end portion of said expansible member; a first opening formed in said base end portion of said inner tube to communicate with said first lumen; a second opening formed in said base end portion of said outer tube to communicate with said second lumen; and a rigidity imparting member consisting of a linear member extending in the axial direction disposed in said second lumen.
Claim 2
Dependent Claim
193 words
A catheter equipped with an expansible member comprising an inner tube having a base end portion and a first lumen whose tip is open; an outer tube capable of inserting said inner tube therein, having a base end portion and the tip thereof at a position recessed by a predetermined distance from the tip of said inner tube, and forming a second lumen between it and the outer surface of said inner tube; a foldable expansible member having a tip end portion and a base end portion, said tip end portion of said expansible member being attached to said inner tube, said base end portion of said expansible member being attached to said outer tube, said expansible member communicating with said second lumen at a portion near said base end portion of said expansible member; a first opening formed in said base end portion of said inner tube to communicate with said first lumen; a second opening formed in said base end portion of said outer tube to communicate with said second lumen; and a rigidity imparting member consisting of a linear member extending in the axial direction disposed in said second lumen.
Claim 3
Dependent Claim
39 words
A catheter equipped with an expansible member set forth in claim 1, wherein the rigidity of the base end side of said rigidity imparting member is higher than that of the tip end side of said rigidity imparting member.
Claim 4
Dependent Claim
40 words
A catheter equipped with an expansible member set forth in claim 1, wherein the cross section of the base end side of said rigidity imparting member is larger than that of the tip end side of said rigidity imparting member.
Claim 5
Dependent Claim
236 words
A catheter equipped with an expansible member comprising a catheter main body having a tip end portion and a base end portion and comprising an inner tube having a tip end portion, a base end portion and a first lumen whose tip is open, an outer tube capable of inserting said inner tube therein, having a tip end portion, a base end portion and the tip thereof at a position recessed by a predetermined distance from the tip of said inner tube, and forming a second lumen between it and the outer surface of said inner tube, and a foldable expansible member having a tip end portion and a base end portion, said tip end portion of said expansible member being attached to said inner tube, said base end portion of said expansible member being attached to said outer tube, said expansible member communicating with said second lumen at a portion near said base end portion of said expansible member; a first opening formed in said base end portion of said inner tube to communicate with said first lumen; and a second opening formed in said base end portion of said outer tube to communicate with said second lumen, the outer diameter of said tip end portion of said catheter main body including a portion to which said expansible member is attached is smaller than that of said base end portion of said catheter main body.
Claim 6
Dependent Claim
236 words
A catheter equipped with an expansible member comprising a catheter main body having a tip end portion and a base end portion and comprising an inner tube having a tip end portion, a base end portion and a first lumen whose tip is open, an outer tube capable of inserting said inner tube therein, having a tip end portion, a base end portion and the tip thereof at a position recessed by a predetermined distance from the tip of said inner tube, and forming a second lumen between it and the outer surface of said inner tube, and a foldable expansible member having a tip end portion and a base end portion, said tip end portion of said expansible member being attached to said inner tube, said base end portion of said expansible member being attached to said outer tube, said expansible member communicating with said second lumen at a portion near said base end portion of said expansible member; a first opening formed in said base end portion of said inner tube to communicate with said first lumen; and a second opening formed in said base end portion of said outer tube to communicate with said second lumen, the outer diameter of said tip end portion of said catheter main body including a portion to which said expansible member is attached is smaller than that of said base end portion of said catheter main body.
Claim 7
Dependent Claim
36 words
A catheter equipped with an expansible member set forth in claim 4, wherein said catheter further comprises a rigidity imparting member consisting of a linear member extending in the axial direction disposed in said second lumen.
Claim 8
Dependent Claim
38 words
A catheter equipped with an expansible member set forth in claim 4, wherein the outer diameter of said tip end portion of said inner tube is smaller than that of said base end portion of said inner tube.
Claim 9
Dependent Claim
38 words
A catheter equipped with an expansible member set forth in claim 4, wherein the outer diameter of said tip end portion of said outer tube is smaller than that of said base end portion of said outer tube.
Claim 10
Dependent Claim
39 words
A catheter equipped with an expansible member set forth in claim 5, wherein the rigidity of the base end side of said rigidity imparting member is higher than that of the tip end side of said rigidity imparting member.
Claim 11
Dependent Claim
40 words
A catheter equipped with an expansible member set forth in claim 5, wherein the cross section of the base end side of said rigidity imparting member is larger than that of the tip end side of said rigidity imparting member.
Claim 12
Dependent Claim
50 words
A catheter equipped with an expansible member set forth in claim 4, wherein the length of said tip end portion of said catheter main body the outer diameter of which is small is a length near the distance from the inlet of a carronary artery to an aimed lesion part.
Claim 13
Dependent Claim
178 words
A catheter equipped with an expansible member comprising a catheter tube having a tip end portion, a base end portion, a first lumen the tip of which is open, a second lumen open at a position recessed by a predetermined distance from said tip of said first lumen; a foldable expansible member having a tip end portion and a base end portion, said tip end portion of said expansible member being attached to said tip end portion of said catheter tube, said base end portion of said expansible member being attached to a portion near an opening portion formed near the tip of said catheter tube, said expansible member communicating with said second lumen; a first opening formed in said base end portion of said catheter tube to communicate with said first lumen; a second opening formed in said base end portion of said catheter tube to communicate with said second lumen; and a rigidity imparting member consisting of a linear member extending in the axial direction disposed in at least one of said first and second lumens.
Claim 14
Dependent Claim
178 words
A catheter equipped with an expansible member comprising a catheter tube having a tip end portion, a base end portion, a first lumen the tip of which is open, a second lumen open at a position recessed by a predetermined distance from said tip of said first lumen; a foldable expansible member having a tip end portion and a base end portion, said tip end portion of said expansible member being attached to said tip end portion of said catheter tube, said base end portion of said expansible member being attached to a portion near an opening portion formed near the tip of said catheter tube, said expansible member communicating with said second lumen; a first opening formed in said base end portion of said catheter tube to communicate with said first lumen; a second opening formed in said base end portion of said catheter tube to communicate with said second lumen; and a rigidity imparting member consisting of a linear member extending in the axial direction disposed in at least one of said first and second lumens.
Claim 15
Dependent Claim
39 words
A catheter equipped with an expansible member set forth in claim 11, wherein the rigidity of the base end side of said rigidity imparting member is higher than that of the tip end side of said rigidity imparting member.
Claim 16
Dependent Claim
40 words
A catheter equipped with an expansible member set forth in claim 11, wherein the cross section of the base end side of said rigidity imparting member is larger than that of the tip end side of said rigidity imparting member.
Claim 17
Dependent Claim
190 words
A catheter equipped with an expansible member comprising a catheter tube having a tip end portion, a base end portion, a first lumen the tip of which is open, a second lumen open at a position recessed by a predetermined distance from said tip of said first lumen; a foldable expansible member having a tip end portion and a base end portion, said tip end portion of said expansible member being attached to said tip end portion of said catheter tube, said base end portion of said expansible member being attached to a portion near an opening portion formed near the tip of said catheter tube, said expansible member communicating with said second lumen; a first opening formed in said base end portion of said catheter tube to communicate with said first lumen; and a second opening formed in said base end portion of said catheter tube to communicate with said second lumen, the outer diameter of said tip end portion of said catheter tube including at least a portion to which said expansible member is attached is smaller than that of said base end portion of said catheter tube.
Claim 18
Dependent Claim
190 words
A catheter equipped with an expansible member comprising a catheter tube having a tip end portion, a base end portion, a first lumen the tip of which is open, a second lumen open at a position recessed by a predetermined distance from said tip of said first lumen; a foldable expansible member having a tip end portion and a base end portion, said tip end portion of said expansible member being attached to said tip end portion of said catheter tube, said base end portion of said expansible member being attached to a portion near an opening portion formed near the tip of said catheter tube, said expansible member communicating with said second lumen; a first opening formed in said base end portion of said catheter tube to communicate with said first lumen; and a second opening formed in said base end portion of said catheter tube to communicate with said second lumen, the outer diameter of said tip end portion of said catheter tube including at least a portion to which said expansible member is attached is smaller than that of said base end portion of said catheter tube.
Claim 19
Dependent Claim
42 words
A catheter equipped with an expansible member set forth in claim 14, wherein said catheter further comprises a rigidity imparting member consisting of a linear member extending in the axial direction disposed in at least one of said first and second lumens.
Claim 20
Dependent Claim
39 words
A catheter equipped with an expansible member set forth in claim 15, wherein the rigidity of the base end side of said rigidity imparting member is higher than that of the tip end side of said rigidity imparting member.
Claim 21
Dependent Claim
40 words
A catheter equipped with an expansible member set forth in claim 15, wherein the cross section of the base end side of said rigidity imparting member is larger than that of the tip end side of said rigidity imparting member.
Claim 22
Dependent Claim
49 words
A catheter equipped with an expansible member set forth in claim 15, wherein the length of said tip end portion of said catheter tube the outer diameter of which is small is a length near the distance from the inlet of a carronary artery to an aimed lesion part.
Claim 23
Independent Claim
279 words
A method of manufacturing a catheter equipped with an expansible member comprising a step of forming an inner tube having a tip end portion and a lumen extending from the tip end to the base end of said inner tube; a step of forming an outer tube having a tip end portion, a lumen extending from the tip end to the base end of said outer tube, an inner diameter larger than the outer diameter of said inner tube, and a length smaller than that of said inner tube by a predetermined length; a step of forming a contractible or foldable expansible member having a tip end portion and a base end portion; a step of inserting said inner tube in said outer tube; a step of attaching said base end portion of said expansible member to said tip end portion of said outer tube; and a step of attaching said tip end portion of said expansible member to said tip end portion of said inner tube, said step of forming said outer tube comprising a step of forming a front outer tube having a lumen extending from the tip end to the base end thereof, a step of forming a rear outer tube having an outer diameter larger than that of said front outer tube and a lumen extending the tip end to the base end of said rear outer tube, a step of tapering one end of said rear outer tube, a step of enlarging the diameter at one end of said front outer tube, and a step of connecting the tapered end of said rear outer tube to the enlarged end of said front outer tube.
Claim 24
Independent Claim
279 words
A method of manufacturing a catheter equipped with an expansible member comprising a step of forming an inner tube having a tip end portion and a lumen extending from the tip end to the base end of said inner tube; a step of forming an outer tube having a tip end portion, a lumen extending from the tip end to the base end of said outer tube, an inner diameter larger than the outer diameter of said inner tube, and a length smaller than that of said inner tube by a predetermined length; a step of forming a contractible or foldable expansible member having a tip end portion and a base end portion; a step of inserting said inner tube in said outer tube; a step of attaching said base end portion of said expansible member to said tip end portion of said outer tube; and a step of attaching said tip end portion of said expansible member to said tip end portion of said inner tube, said step of forming said outer tube comprising a step of forming a front outer tube having a lumen extending from the tip end to the base end thereof, a step of forming a rear outer tube having an outer diameter larger than that of said front outer tube and a lumen extending the tip end to the base end of said rear outer tube, a step of tapering one end of said rear outer tube, a step of enlarging the diameter at one end of said front outer tube, and a step of connecting the tapered end of said rear outer tube to the enlarged end of said front outer tube.
Claim 25
Dependent Claim
69 words
A method of manufacturing a catheter equipped with an expansible member set forth in claim 19, wherein said step of connecting the tapered end of said rear outer tube to the enlarged end of said front outer tube comprises a step of fitting said tapered end of said rear outer tube in said enlarged end of said front outer tube and a step of bonding them to each other.
Claim 26
Dependent Claim
164 words
A catheter equipped with an expansible member comprising an inner tube having a tip end portion and a first lumen whose tip is open; an outer tube capable of inserting said inner tube therein, having the tip thereof at a position recessed by a predetermined distance from the tip of said inner tube, and forming a second lumen between it and the outer surface of said inner tube; and a foldable expansible member having a tip end portion and a base end portion, said tip end portion of said expansible member being attached to said inner tube, said base end portion of said expansible member being attached to said outer tube, said expansible member communicating with said second lumen at a portion near said base end portion of said expansible member, said tip end portion of said expansible member attached to said inner tube protruding beyond said inner tube toward the tip of said catheter to form a tip end portion of said catheter.
Claim 27
Dependent Claim
164 words
A catheter equipped with an expansible member comprising an inner tube having a tip end portion and a first lumen whose tip is open; an outer tube capable of inserting said inner tube therein, having the tip thereof at a position recessed by a predetermined distance from the tip of said inner tube, and forming a second lumen between it and the outer surface of said inner tube; and a foldable expansible member having a tip end portion and a base end portion, said tip end portion of said expansible member being attached to said inner tube, said base end portion of said expansible member being attached to said outer tube, said expansible member communicating with said second lumen at a portion near said base end portion of said expansible member, said tip end portion of said expansible member attached to said inner tube protruding beyond said inner tube toward the tip of said catheter to form a tip end portion of said catheter.
Claim 28
Dependent Claim
43 words
A catheter equipped with an expansible member set forth in claim 21, wherein said tip end portion of said expansible member covers the outer surface of said tip end portion of said inner tube and the tip end surface of said inner tube.
Claim 29
Dependent Claim
21 words
A catheter equipped with an expansible member set forth in claim 21, wherein the tip of said expansible member is rounded.
Claim 30
Independent Claim
255 words
A method of manufacturing a catheter equipped with an expansible member comprising a step of forming an inner tube having a tip end portion and a lumen extending from the tip end to the base end of said inner tube; a step of forming an outer tube having a tip end portion, a lumen extending from the tip end to the base end of said outer tube, an inner diameter larger than the outer diameter of said inner tube, and a length shorter than that of said inner tube by a predetermined length; a step of forming a contractible or foldable expansible member having a tip end portion and a base end portion; a step of inserting said inner tube in said outer tube; a step of attaching said base end portion of said expansible member to said tip end portion of said outer tube; and a step of attaching said tip end portion of said expansible member to said tip end portion of said inner tube; a step of cutting one end of said expansible member so that said end of said expansible member protrudes beyond said inner tube by a predetermined length; and a step of forming a tip end portion of said catheter by using said tip end portion of said expansible member with heat treatment of the protruding portion of said expansible member beyond said inner tube by said predetermined length and coating the outer surface of said tip end portion of said inner tube and the tip end surface thereof.
Claim 31
Independent Claim
255 words
A method of manufacturing a catheter equipped with an expansible member comprising a step of forming an inner tube having a tip end portion and a lumen extending from the tip end to the base end of said inner tube; a step of forming an outer tube having a tip end portion, a lumen extending from the tip end to the base end of said outer tube, an inner diameter larger than the outer diameter of said inner tube, and a length shorter than that of said inner tube by a predetermined length; a step of forming a contractible or foldable expansible member having a tip end portion and a base end portion; a step of inserting said inner tube in said outer tube; a step of attaching said base end portion of said expansible member to said tip end portion of said outer tube; and a step of attaching said tip end portion of said expansible member to said tip end portion of said inner tube; a step of cutting one end of said expansible member so that said end of said expansible member protrudes beyond said inner tube by a predetermined length; and a step of forming a tip end portion of said catheter by using said tip end portion of said expansible member with heat treatment of the protruding portion of said expansible member beyond said inner tube by said predetermined length and coating the outer surface of said tip end portion of said inner tube and the tip end surface thereof.
References Cited (Backward Citations)
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