EP0595308A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Rapid exchange catheter
Assignee: Cordis Corp
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Filing: 1993-10-27
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Granted: —
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Expires: 2013-10-27
Abstract
Abstract This invention relates to a balloon dilatation catheter (1) and its preparation. The balloon dilatation catheter (1) comprises a first, inflation lumen (2) extending therethrough and having distal and proximal ends, the distal end of the first lumen (2) opening into and being in fluid communication with the interior of an inflatable dilatation balloon (4) having distal and proximal ends, and a second lumen (3) extending coextensively with the first lumen (2) and having proximal (18) and distal (10) portions. The distal end of the second lumen (3) is open, the distal portion (10) of the second lumen (3) has an opening (9) proximal, adjacent, or distal to the proximal end of the dilatation balloon (4), the portion (10) of the second lumen (3) distal to the opening is enlarged as compared to the proximal portion (18) to facilitate receiving a guidewire (8) in a sliding fit, and the portion (18) of the second lumen (3) proximal to the opening (9) contains a pushing wire (5).
Inventors
- 👤 Ronald J. Solar
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 20:21
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/104; A61M25/1027; A61M25/1036; A61M25/0043; A61M2025/0063; A61M25/01; A61M2025/0177; A61M2025/0183; A61M2025/1043; A61M2025/1079; A61M25/1029
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
234 words
A balloon dilatation catheter which comprises: an elongate flexible tubular shaft (1) having a proximal end and a distal end; an inflatable dilatation balloon (4) forming part of the distal end of the shaft, the dilatation balloon (4) having a proximal end and a distal end; a first, inflation lumen (2) extending through the shaft (1) and having a proximal end and a distal end, the distal end of the first lumen opening into and being in fluid communication with the dilatation balloon (4); a second lumen (3) extending through the shaft and having a proximal end and a distal end, the distal end of the second lumen (3) being open and the second lumen (3) having a distal portion (10) defined by (i) an opening (9) proximal to the distal end of the second lumen (3) and (ii) the distal end of the second lumen (3), and a proximal portion (18) defined by the portion of the second lumen (3) proximal to said opening, said distal portion (10) being enlarged as compared to the proximal portion (18) to facilitate receiving a guidewire (8) in a sliding fit; and a pushing wire (5) having a proximal end and a distal end and extending through the second lumen (3), the distal end (7) of the pushing wire (5) being fixed in the second lumen (3) proximal to the distal end of the second lumen (3).
Claim 2
Dependent Claim
27 words
The catheter of Claim 1, wherein the opening (9) of the second lumen (3) is proximal or adjacent to the distal end of the dilatation balloon (4).
Claim 3
Dependent Claim
28 words
The catheter of Claim 1, wherein the distal end (7) of the pushing wire (5) is positioned at or near the opening (9) of the second lumen (3).
Claim 4
Dependent Claim
18 words
The catheter of Claim 1, wherein the enlarged portion (10) of the second lumen (3) comprises lubricious material.
Claim 5
Dependent Claim
27 words
The catheter of Claim 4, wherein the lubricious material is in the form of tubing (14) within the enlarged distal portion (10) of the second lumen (3).
Claim 6
Dependent Claim
38 words
The catheter of Claim 5, wherein the enlarged distal portion (10) has an inner surface and the distal end (7) of the pushing wire (5) is held in position by the lubricious tubing (14) and said inner surface.
Claim 7
Dependent Claim
29 words
The catheter of Claim 1, wherein the proximal portion (18) of the second lumen (3) proximal to the opening (9) has been heat shrunk around the pushing wire (5).
Claim 8
Dependent Claim
36 words
The catheter of Claim 1, wherein the proximal end of the first lumen (2) is connected to a fluid communication means (32) such that the first lumen (2) is in fluid communication with an inflation source.
Claim 9
Dependent Claim
25 words
The catheter of Claim 1 which comprises at least one additional lumen extending through the tubular shaft (1) and having open proximal and distal ends.
Claim 10
Dependent Claim
11 words
The catheter of Claim 9, wherein there is one additional lumen.
Claim 11
Dependent Claim
39 words
The catheter of Claim 10, wherein the proximal end of the additional lumen is connected to a fluid communication means (32) such that the distal end of the lumen is in fluid communication with the fluid communication means (32).
Claim 12
Dependent Claim
30 words
A balloon dilatation catheter system which comprises a guidewire (8) and two or more catheters (1) of Claim 1, which catheters (1) can be sequentially exchanged over said guidewire (8).
Claim 13
Dependent Claim
27 words
The system of Claim 12, wherein the guidewire (8) has a splitter (31) for splitting the enlarged portion of the second lumen (3) of each catheter (1).
Claim 14
Dependent Claim
18 words
The system of Claim 12, wherein each catheter (1) has a dilatation balloon (4) of a different size.
Claim 15
Independent Claim
251 words
A method of preparing a balloon dilatation catheter which comprises the steps of: (a) blowing a length of multiple lumen tubing to produce a double lumen catheter piece (20) having distal and proximal ends and having a first lumen (2) and a second lumen (3); (b) cutting an opening (9) in the second lumen (3) proximal to the distal end of the catheter piece (20); (c) inserting a pushing wire (5) having distal (7) and proximal ends into the second lumen (3) through the proximal end of the catheter piece until the distal end (7) of the pushing wire extends distally across the opening (9); (d) inserting a piece of lubricious tubing (14) having proximal and distal ends proximally into the second lumen (3) through the distal end of the catheter piece so that the proximal end of the lubricious tubing (14) is adjacent to or proximal to the distal end (7) of the pushing wire (5); (e) sealing the distal end of the first lumen (2); (f) heating the distal portion of the catheter piece (20) to cause the distal portion of the second lumen (3) to shrink slightly to cause the lubricious tubing (14) to fixedly engage the distal end (7) of the pushing wire (5), while the first lumen (2) is pressurized; and (g) heating the catheter piece (20) proximal to its distal portion to cause the second lumen (3) to shrink around the pushing wire (5) and the first lumen (2) to shrink to define a balloon.
Claim 16
Dependent Claim
42 words
The method of Claim 15, which comprises the additional step of attaching a fluid communication means (32) to the proximal end of the catheter piece (20) to enable the first lumen (2) to be in fluid communication with an inflation fluid source.
Claim 17
Dependent Claim
17 words
The method of Claim 15, wherein the tubing blown in step (a) has more than two lumens.
Claim 18
Dependent Claim
18 words
The method of Claim 17, wherein the tubing has at least one lumen having an open distal end.
Claim 19
Dependent Claim
61 words
The method of Claim 18, which comprises the additional step of attaching fluid communication means (32) to the proximal end of the catheter (1) to enable the first lumen (2) to be in fluid communication with an inflation fluid source and to enable at least one additional lumen to be in fluid communication with the proximal end of the catheter (1).
Claim 20
Independent Claim
273 words
A method of preparing a balloon dilatation catheter which comprises the steps of: (a) blowing a length of multiple lumen tubing to produce a double lumen workpiece (21) having distal and proximal ends and having first (22) and second (23) lumens having respective proximal and distal ends; (b) sealing the distal end of the first lumen (22); (c) inflating the first lumen (22) to cause a dilatation balloon (4) to form in the first lumen (22) proximal to the distal end of the first lumen (22); (d) cutting an opening (9) in the second lumen (23) proximal to the distal end of the catheter workpiece (21); (e) inserting a pushing wire (5) having distal and proximal ends into the second lumen (23) through the proximal end of the catheter workpiece (21) until the distal end (7) of the pushing wire (7) extends distally across the opening (9); (f) inserting a piece of lubricious tubing (14) having proximal and distal ends proximally into the second lumen (23) through the distal end of the catheter workpiece (21) so that the proximal end of the lubricious tubing (14) is adjacent to or proximal to the distal end (7) of the pushing wire (5); (g) heating the distal portion of the catheter workpiece (21) to cause the distal portion of the second lumen (23) to shrink slightly to cause the lubricious tubing (14) to fixedly engage the distal end (7) of the pushing wire (5), while the first lumen (22) is pressurized; and (h) heating the catheter workpiece (21) proximal to its distal portion to cause the second lumen (23) to shrink around the pushing wire (5).
Claim 21
Dependent Claim
42 words
The method of claim 20, which comprises the additional step of attaching a fluid communication means (32) to the proximal end of the catheter workpiece (21) to enable the first lumen (22) to be in fluid communication with an inflation fluid source.
Claim 22
Dependent Claim
17 words
The method of Claim 20, wherein the tubing blown in step (a) has more than two lumens.
Claim 23
Dependent Claim
18 words
The method of Claim 22, wherein the tubing has at least one lumen having an open distal end.
Claim 24
Dependent Claim
43 words
The method of Claim 23, which comprises the additional step of attaching fluid communication means (32) to the proximal end of the catheter (1) to enable the first lumen (22) to be in fluid communication with the proximal end of the catheter (1).
References Cited (Backward Citations)
No citation records indexed.
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