EP0347458A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Balloon catheter and production thereof
Assignee: Terumo Corp
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Filing: 1988-01-12
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Granted: —
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Expires: 2008-01-12
Abstract
Abstract Balloon catheter comprising a main body having an annular groove formed on the peripheral surface at the tip of a flexible tube member having at least one internal passage and a balloon disposed in such a mannerthat its outer diameter, when it is not inflated, is equal to, or smaller than, the maximum outer diameter of the tip of the tube member. The balloon is inflated or deflated through a balloon inflation/ deflation internal passage opening to the bottom of the annular groove. This invention also relates to a method of producing the balloon catheter described above. The method comprises reducing the diameter of the tip of a flexible tube member to such an extent that a necessary internal passage does not disappear, fitting a tubular heat-resistant member over that part of the tip having the reduced diameter, at which the balloon is to be fitted, molding in a spherical shape that part of the tip that extends beyond this tubular heat-resistant member, removing the tubular heat-resistant member and fitting the balloon.
Inventors
- 👤 Yoshio Terumo Kabushiki Kaisha Ishitsu
- 👤 Kouji Terumo Kabushiki Kaisha Tsuchida
- 👤 Shigekazu Terumo Kabushiki Kaisha Sekii
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 19:18
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/1027; A61M25/1034; A61M25/1002; A61M2025/1043; A61M2025/1065
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
128 words
A balloon catheter comprising: a catheter body made of a flexible tube provided with at least one inner channel with an opening at a distal end portion thereof, the catheter body being provided with an annular groove formed on an outer surface of the tube adjacent to the distal end portion along a circumferential direction of the tube and having a predetermined length along an axial direction of the tube and with a balloon inflation inner channel open to a bottom portion of the annular groove; and a balloon for covering the bottom portion of the annular groove, the balloon being arranged in the annular groove such that a diameter is equal to or smaller than a maximum outer diameter of the distal end portion of the tube.
Claim 2
Dependent Claim
128 words
A balloon catheter comprising: a catheter body made of a flexible tube provided with at least one inner channel with an opening at a distal end portion thereof, the catheter body being provided with an annular groove formed on an outer surface of the tube adjacent to the distal end portion along a circumferential direction of the tube and having a predetermined length along an axial direction of the tube and with a balloon inflation inner channel open to a bottom portion of the annular groove; and a balloon for covering the bottom portion of the annular groove, the balloon being arranged in the annular groove such that a diameter is equal to or smaller than a maximum outer diameter of the distal end portion of the tube.
Claim 3
Dependent Claim
35 words
A catheter according to claim 1, wherein an upper edge of a wall surface defining the annular groove at a side contacting the distal end portion of the tube body is a smooth curved surface.
Claim 4
Dependent Claim
19 words
A catheter according to claim 1, wherein the distal end portion has a smooth curved surface or is flat.
Claim 5
Dependent Claim
40 words
A catheter according to claim l, wherein a balloon catheter including cylindrical reinforcing members is inserted in inner channels at positions corresponding to at least a balloon mounting portion so as to communicate with other portions of the inner channels.
Claim 6
Dependent Claim
35 words
A catheter according to claim 4, wherein each reinforcing member has substantially the same inner diameter as that of a corresponding one of the inner channels and is connected thereto through a substantially smooth surface.
Claim 7
Dependent Claim
16 words
A catheter according to claim 4, wherein the reinforcing member is made of an anti-thrombic material.
Claim 8
Dependent Claim
16 words
A catheter according to claim 4, wherein the reinforcing member is prepared with an anti-thrombic treatment.
Claim 9
Dependent Claim
19 words
A catheter according to claim 4 , wherein the reinforcing member is made of a heat-resistant hard plastic material.
Claim 10
Dependent Claim
15 words
A catheter according to claim 4, wherein the reinforcing member is made of a metal.
Claim 11
Dependent Claim
14 words
A catheter according to claim 4, wherein the reinforcing member is made of ceramics.
Claim 12
Dependent Claim
157 words
11 . A method of manufacturing a balloon catheter, comprising the steps of: forming a prospective balloon mounting portion and a prospective catheter distal end forming portion extending toward the extreme end from the prospective balloon mounting portion by reducing an outer diameter of a distal end portion of a balloon catheter body made of a thermoplastic material and having a predetermined inner channel, thereby forming a small-diameter portion while allowing the predetermined inner channel to remain therein; inserting a tubular heat-resistant member into the prospective balloon mounting portion of the small-diameter portion and protecting the prospective balloon mounting portion, the tubular heat-resistant member having an inner diameter substantially the same as an outer diameter of the small-diameter portion; forming the prospective catheter distal end forming portion extending from the tubular heat-resistant member into a catheter distal end shape; and mounting an inflatable balloon to the prospective balloon mounting portion after the tubular heat-resistant member is removed.
Claim 13
Dependent Claim
157 words
11 . A method of manufacturing a balloon catheter, comprising the steps of: forming a prospective balloon mounting portion and a prospective catheter distal end forming portion extending toward the extreme end from the prospective balloon mounting portion by reducing an outer diameter of a distal end portion of a balloon catheter body made of a thermoplastic material and having a predetermined inner channel, thereby forming a small-diameter portion while allowing the predetermined inner channel to remain therein; inserting a tubular heat-resistant member into the prospective balloon mounting portion of the small-diameter portion and protecting the prospective balloon mounting portion, the tubular heat-resistant member having an inner diameter substantially the same as an outer diameter of the small-diameter portion; forming the prospective catheter distal end forming portion extending from the tubular heat-resistant member into a catheter distal end shape; and mounting an inflatable balloon to the prospective balloon mounting portion after the tubular heat-resistant member is removed.
Claim 14
Dependent Claim
44 words
A method according to claim 11, wherein the step of forming the small-diameter portion of the distal end portion comprises the step of inserting a heat-resistant rod or pipe in a predetermined inner channel subjected to catheter indwelling and heat-treating the distal end portion.
Claim 15
Dependent Claim
37 words
A method according to claim 11, wherein the step of forming the distal end portion of the catheter comprises the step of forming a flanged distal end with a smooth curved or a relatively flat upper surface.
Claim 16
Dependent Claim
44 words
1 4. A method according to claim 11, wherein the step of mounting the balloon comprises the step of mounting the balloon such that an outer diameter thereof is equal to or smaller than an outer diameter of the distal end of the catheter.
Claim 17
Dependent Claim
18 words
A method according to claim 11, wherein the tubular heat-resistant member is dividable along a longitudinal direction thereof.
Claim 18
Dependent Claim
22 words
A method according to claim 1 1, wherein the step of forming the distal end portion is performed by molding with heat.
Claim 19
Dependent Claim
23 words
A method according to claim 11, wherein the step of forming the distal end portion is performed by molding with an ultrasonic wave.
Claim 20
Dependent Claim
35 words
A method according to claim 11, wherein the step of forming the distal end portion of the catheter includes the step of forming a smooth catheter distal end edge which contacts the balloon mounting portion.
Claim 21
Dependent Claim
138 words
A method according to claim 11, further comprising the steps of: inserting the cylindrical reinforcing members in the distal end portion including positions, corresponding to the balloon mounting portion, of necessary inner channels of a balloon catheter body having a plurality of inner channels, prior to the step of forming a small-diameter portion of the distal end portion of the catheter body; performing distal end working, including reduction of a diameter of the distal end portion, for the distal end portion including the positions corresponding to the balloon mounting portion; and mounting a balloon to the balloon mounting portion while the reinforcing members are left in position, wherein cylindrical reinforcing members are fixed in inner channels at positions corresponding to at least a balloon mounting portion so as to allow communication with other portions of the inner channels.
Claim 22
Independent Claim
262 words
A method of manufacturing a balloon catheter, comprising steps of: preparing a catheter body having a balloon inflation inner channel and an annular groove, the annuler groove extending in an outer surface of a flexible tube for a predetermined length of an axial direction thereof so as to be adjacent to a distal end portion of the flexible tube, the flexible tube being provided with at least one inner channel open to the distal end portion and the balloon inflation inner channel being open to a bottom of the annular groove; inserting a red or pipe member having the substantially the same outer diameter as the inner diameter of the inner channel into the inner channel to assure the inner diameter of the inner channel; placing one end of a balloon tube one end of the annular groove of the distal end portion of the catheter body; fixing one end of the balloon tube to one end of the annular groove by an adhesive or a string which is wound around one end of the balloon tube; turning the balloon tube inside out and fitting the balloon tube in the annular groove; and fixing the other end of the balloon tube to the other end of the annular groove by an adhesive or a string which is wound around the other end of the balloon tube, wherein both the end portions of the balloon tube constitute a substantially continuous flat surface together with the distal end portion of the catheter body and the balloon tube rear adhesion portion of the catheter body.
Claim 23
Independent Claim
262 words
A method of manufacturing a balloon catheter, comprising steps of: preparing a catheter body having a balloon inflation inner channel and an annular groove, the annuler groove extending in an outer surface of a flexible tube for a predetermined length of an axial direction thereof so as to be adjacent to a distal end portion of the flexible tube, the flexible tube being provided with at least one inner channel open to the distal end portion and the balloon inflation inner channel being open to a bottom of the annular groove; inserting a red or pipe member having the substantially the same outer diameter as the inner diameter of the inner channel into the inner channel to assure the inner diameter of the inner channel; placing one end of a balloon tube one end of the annular groove of the distal end portion of the catheter body; fixing one end of the balloon tube to one end of the annular groove by an adhesive or a string which is wound around one end of the balloon tube; turning the balloon tube inside out and fitting the balloon tube in the annular groove; and fixing the other end of the balloon tube to the other end of the annular groove by an adhesive or a string which is wound around the other end of the balloon tube, wherein both the end portions of the balloon tube constitute a substantially continuous flat surface together with the distal end portion of the catheter body and the balloon tube rear adhesion portion of the catheter body.
Claim 24
Dependent Claim
69 words
A method according to claim 20, wherein the step of forming the substantially smooth, continuous surface the connecting portion between both the end portions of the balloon tube and the catheter body comprises the step of filling a potting material in the boundary portion between the balloon tube and the distal end of catheter body or between the balloon tube and the rear adhesion portion of the catheter body.
Claim 25
Dependent Claim
63 words
A method according to claim 20, wherein the step of forming the substantially smooth, continuous surface at the connecting portion between both the end portions of the balloon tube and the catheter body comprises the step of winding a string around the boundary portion with a proper tension and embedding the balloon tube and the string in the tube of the catheter body.
References Cited (Backward Citations)
No citation records indexed.
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