EP0485903A2
Expired / Lapsed
EP
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Catheter balloon, balloon catheter equipped with the balloon, and method of manufacturing the balloon
Assignee: Terumo Corp
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Filing: 1991-11-08
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Granted: —
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Expires: 2011-11-08
Abstract
Abstract A catheter balloon made of a polymer and comprising a cylindrical portion (2) of a substantially uniform diameter, tapered portions (3a,3b) at the front and rear of the cylindrical portion and connecting portions (4a,4b) at the front and rear of the tapered portions, characterized in that the wall thicknesses (B) of the middle parts of the tapered portions are equal to or smaller than 1.2 times the wall thickness (A) of the cylindrical portion (B/A <_ 1.2).
Inventors
- 👤 Hitoshi c/o Terumo Kabushiki Kaisha Ozasa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 01:42
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/1027; A61M25/1029; B; B29; B29C; B29C49/00; B29C49/08; B29C49/087; B29C49/0872; B29C35/00; B29C35/16; B29C2035/1616; B29C49/42; B29C49/78; B29C49/786; B29C2049/7864; B29C2049/78645; B29C2049/7879; B29C35/02; B29C49/48; B29C49/4823
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
75 words
A catheter balloon made of a polymer and comprising a cylindrical portion of a substantially uniform diameter, tapered portions at the front and rear of the cylindrical portion and connecting portions at the front and rear of the tapered portions, characterized in that the wall thicknesses (B) of the substantially middle parts of the tapered portions are equal to or smaller than 1.2 times the wall thickness (A) of the cylindrical portion (B/A <_ 1.2).
Claim 2
Dependent Claim
18 words
A catheter balloon in claim 1, in which said cylindrical portion and said tapered portions are biaxially drawn.
Claim 3
Dependent Claim
31 words
A catheter balloon in claim 1, in which said polymer is polyethylene terephthalate, a mixture of polyethylene terephthalate and a polyester other than polyethylene terephthalate or polyolefin, or polyethylene terephthalate copolymer.
Claim 4
Dependent Claim
50 words
A catheter balloon in claim 1, in which the wall thicknesses (B) of the substantially middle parts of said tapered portions are equal to or greater than 0.3 times and equal to or smaller than 0.9 times the wall thickness (A) of said cylindrical portion (0.3 <_ B/A <_ 0.9).
Claim 5
Dependent Claim
13 words
A catheter balloon in claim 1, in which said tapered portions are redrawn.
Claim 6
Dependent Claim
27 words
A catheter balloon in claim 1, in which the wall thickness of the front tapered portion is thinner than the wall thickness of the rear tapered portion.
Claim 7
Dependent Claim
86 words
A balloon catheter comprising a tubular catheter body and a balloon, the balloon made of a polymer and comprising a cylindrical portion of a substantially uniform diameter, tapered portions at the front and rear of the cylindrical portion and connecting portions at the front and rear of the tapered portions and characterized by that the wall thicknesses (B) of the substantially middle parts of the tapered portions are equal to or smaller than 1.2 times the wall thickness (A) of the cylindrical portion (B/A <_ 1.2).
Claim 8
Dependent Claim
13 words
A balloon catheter in claim 7, in which said balloon is biaxially drawn.
Claim 9
Dependent Claim
31 words
A balloon catheter in claim 7, in which said polymer is polyethylene terephthalate, a mixture of polyethylene terephthalate and a polyester other than polyethylene terephthalate or polyolefin, or polyethylene terephthalate copolymer.
Claim 10
Dependent Claim
56 words
A balloon catheter in claim 7, in which the wall thicknesses (B) of the substantially middle parts of said tapered portions of the baloon are equal to or greater than 0.3 times and equal to or smaller than 0.9 times the wall thickness (A) of said cylindrical portion of the balloon (0.3 <_ B/A <_ 0.9).
Claim 11
Dependent Claim
13 words
A balloon catheter in claim 7, in which said tapered portions are redrawn.
Claim 12
Dependent Claim
33 words
A balloon catheter in claim 7, in which the wall thickness of the front tapered portion of the balloon is thinner than the wall thickness of the rear tapered portion of the balloon.
Claim 13
Independent Claim
160 words
A method of manufacturing a catheter balloon comprising, forming a parison out of a drawable polymer, heating the parison at a temperature in the range from the second-order transition temperature to the first-order transition temperature of the polymer used, and then stretching it in the direction of its axis and then inflating it radially while heated, and then cooling the stretched and inflated parison below the second-order transition temperature of the polymer, and then deflating it, a crude balloon thus formed having a cylindrical portion of a substantially uniform desired diameter and desired wall thickness, tapered portions of the wall thicknesses thicker than desired thicknesses at the front and rear of the cylindrical portion and connecting portions at the front and the rear of the tapered portions, and then redrawing the tapered portions of the crude balloon to reduce their wall thicknesses to desired thicknesses by stretching the tapered portions in the direction of the axis of the crude balloon.
Claim 14
Dependent Claim
43 words
A method of manufacturing a catheter balloon in claim 13, in which said method of manufacturing a catheter balloon comprises inflating the crude balloon after said redrawing, and then heating it above the second-order transition temperature of the polymer, and then cooling it.
Claim 15
Dependent Claim
50 words
A method of manufacturing a catheter balloon in claim 13, in which said redrawing is so carried out that the thicknesses (B) of the substantially middle parts of the tapered portions become equal to or smaller than 1.2 times the wall thickness (A) of the cylindrical portion (B/A <_ 1.2).
Claim 16
Dependent Claim
28 words
A method of manufacturing a catheter balloon in claim 13, in which said redrawing is carried out over the tapered portions and connecting portions of the crude balloon.
Claim 17
Dependent Claim
26 words
A method of manufacturing a catheter balloon in claim 13, in which said step of inflating the parison radially is carried out in a metal mold.
Claim 18
Dependent Claim
27 words
A method of manufacturing a catheter balloon in claim 13, in which said step of inflating the redrawn crude balloon is carried out in a metal mold.
Claim 19
Dependent Claim
36 words
A method of manufacturing a catheter balloon in claim 13, in which said drawable polymer is polyethylene terephthalate, a mixture of polyethylene terephthalate and a polyester other than polyethylene terephthalate or polyolefin, or polyethylene terephthalate copolymer.
Claim 20
Dependent Claim
60 words
A method of manufacturing a catheter balloon in claim 13, in which said redrawing is so carried out that the thicknesses (B) of the substantially middle parts of said tapered portions are equal to or greater than 0.3 times and equal to or smaller than 0.9 times the wall thickness (A) of said cylindrical portion (0.3 <_ B/A <_ 0.9).
Claim 21
Dependent Claim
31 words
A method of manufacturing a catheter balloon in claim 13, in which the redrawing rate of the front tapered portion is higher than the redrawing rate of the rear tapered portion.
References Cited (Backward Citations)
No citation records indexed.
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