EP0244818A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Catheter
Assignee: Terumo Corp
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Filing: 1987-05-05
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Granted: —
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Expires: 2007-05-05
Abstract
Abstract A catheter (l) having a curved distal end portion (2) or a flexible distal end portion (2) able to bend when being used, which comprises at least one radio opaque ring member (3) provided on the circumference of the catheter (l), for indicating the direction of the end portion (2). The radio opaque ring member (3) has an outer diameter approximately equal to that of the catheter, and a width (or a length along the axial direction of the catheter) L which satisfies the following relationship with the magnitude of the inner diameter D of the ring member (3): L ≦ Dtan(π/8)
Inventors
- 👤 Susumu Tanabe
- 👤 Masahiro Nudeshima
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 03:17
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/12; A61M; A61M25/00; A61M25/01; A61M25/0105; A61M25/0108
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
79 words
A catheter having a curved distal end portion or a flexible distal end portion able to bend when being used, comprising at least one radio opaque ring member circumferentially formed on said catheter, so as to cross an axial direction of said catheter, said radio opaque ring member satisfying a condition: L ≦ Dtan(π/8) where D is the inner diameter of said radio opaque ring member and L is the length thereof along the axial direction of said catheter.
Claim 2
Dependent Claim
79 words
A catheter having a curved distal end portion or a flexible distal end portion able to bend when being used, comprising at least one radio opaque ring member circumferentially formed on said catheter, so as to cross an axial direction of said catheter, said radio opaque ring member satisfying a condition: L ≦ Dtan(π/8) where D is the inner diameter of said radio opaque ring member and L is the length thereof along the axial direction of said catheter.
Claim 3
Dependent Claim
23 words
A catheter according to claim l, characterized in that said radio opaque ring member is perpendicular to the axial direction of said catheter.
Claim 4
Dependent Claim
31 words
A catheter according to claim l, characterized in that the length L of said radio opaque ring member along the axial direction of said catheter is not more than l mm.
Claim 5
Dependent Claim
25 words
A catheter according to claim l, characterized in that the inner diameter D of said radio opaque ring member is not more than 3 mm.
Claim 6
Dependent Claim
20 words
A catheter according to claim l, characterized in that said radio opaque ring member satisfies a condition: L ≦ Dtan(π/l2).
Claim 7
Dependent Claim
31 words
A catheter according to claim l, characterized in that said radio opaque ring member comprises a plurality of members spaced apart from each other and formed on said distal end portion.
Claim 8
Dependent Claim
30 words
A catheter according to claim l, characterized in that said radio opaque ring member comprises at least three members which are equidistantly formed along the axial direction of said catheter.
Claim 9
Dependent Claim
19 words
A catheter according to claim l, characterized in that said radio opaque ring member comprises a shape memory alloy.
Claim 10
Dependent Claim
15 words
A catheter according to claim l, characterized in that said catheter is an angiographic catheter.
Claim 11
Dependent Claim
105 words
l0. A catheter having a curved distal end portion or a flexible distal end portion able to bend when being used, comprising at least one radio opaque ring member circumferentially formed on said catheter so as to cross an axial direction of said catheter, said radio opaque ring member satisfying the condition: L ≦ Dtan(π/8) where D is the inner diameter of said radio opaque ring member and L is the length thereof along the axial direction of said catheter, said radio opaque ring member being provided with a portion of no or less radio opaque and extending along the axial direction of said catheter.
Claim 12
Dependent Claim
105 words
l0. A catheter having a curved distal end portion or a flexible distal end portion able to bend when being used, comprising at least one radio opaque ring member circumferentially formed on said catheter so as to cross an axial direction of said catheter, said radio opaque ring member satisfying the condition: L ≦ Dtan(π/8) where D is the inner diameter of said radio opaque ring member and L is the length thereof along the axial direction of said catheter, said radio opaque ring member being provided with a portion of no or less radio opaque and extending along the axial direction of said catheter.
Claim 13
Dependent Claim
20 words
A catheter according to claim l0, characterized in that said portion having no X-ray contrast medium function comprises a slit.
Claim 14
Dependent Claim
39 words
A catheter according to claim l0, characterized in that said portion having no X-ray contrast medium function has a width which falls within a range of l/24 to l/4 an overall circumferential length of said radio opaque ring member.
Claim 15
Dependent Claim
23 words
A catheter according to claim l0, characterized in that said radio opaque ring member is perpendicular to the axial direction of said catheter.
Claim 16
Dependent Claim
31 words
A catheter according to claim l0, characterized in that the length L of said radio opaque ring member along the axial direction of said catheter is not more than l mm.
Claim 17
Dependent Claim
25 words
A catheter according to claim l0, characterized in that the inner diameter D of said radio opaque ring member is not more than 3 mm.
Claim 18
Dependent Claim
20 words
A catheter according to claim l0, characterized in that said radio opaque ring member satisfies the condition: L ≦ Dtan(π/l2).
Claim 19
Dependent Claim
31 words
A catheter according to claim l0, characterized in that said radio opaque ring member comprises a plurality of members spaced apart from each other and formed on said distal end portion.
Claim 20
Dependent Claim
30 words
A catheter according to claim l0, characterized in that said radio opaque ring member comprises at least three members which are equidistantly formed along the axial direction of said catheter.
Claim 21
Dependent Claim
19 words
A catheter according to claim l0, characterized in that said radio opaque ring member comprises a shape memory alloy.
Claim 22
Dependent Claim
15 words
A catheter according to claim l0, characterized in that said catheter is an angiographic catheter.
References Cited (Backward Citations)
No citation records indexed.
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