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Patent EP0433447A1 successfully refreshed from Google Patents.
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EP0433447A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Catheter

Assignee: Terumo Corp
•
Filing: 1988-08-12
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Granted: —
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Expires: 2008-08-12
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Abstract

Abstract This invention relates to a catheter equipped detachably at the tip thereof with a cylindrical expansion holding member of expanding the inner diameter of the lumen of the blood vessel or other tubular organ and for holding it in an expanded state either temporarily or permanently. The tip of the catheter which supports this member has a sufficiently smaller outer diameter than those of the other portions and the outer diameter of the expansion holding member is equal to, or smaller than, the outer diameters of the rest of portions of the catheter even when the expansion holding member is supported at the tip. The expansion holding member is made of a shape memory alloy so that it can expand or contract in the radial direction with a temperature change. Expansion or contraction of this member is made by causing the outflow of a heated or cooled liquid from a side hole bored at said tip of the catheter and bringing it into contact with the expansion holding member.

Inventors

  • 👤 Fumiaki Harada

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-04 09:46
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/95; A61F2/82; A61F2/86; A61F2/88; A61F2/0004; A61F2210/00; A61F2210/0014; A61F2210/0019; A61F2210/0023; A61F2250/00; A61F2250/0058; A61F2250/0096; A61F2250/0098

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 181 words
A catheter characterized by comprising a catheter tube having an open proximal end or two open ends and at least one side opening formed on a circumferential wall near a distal end of said catheter tube to communicate with an opening at said proximal end, a hub portion formed to communicate with said opening at said proximal end of said catheter tube, and an expansion holder for holding an inner diameter of an internal cavity of a tubular organ, said expansion holder being made of a shape memory alloy cylinder which can radially expand or contract upon changes in temperature, and said expansion holder being mounted to cover at least part of a catheter tube portion corresponding to said side opening, wherein an outer diameter of said catheter tube portion corresponding to said side opening is smaller than that of other catheter tube portions, and said expansion holder is mounted on said catheter tube portion corresponding to said side opening so that an outer diameter of said expansion holder is equal to or smaller than that of other catheter tube portions.
Claim 2
Dependent Claim 25 words
A catheter according to claim 1, wherein at least one x-ray non-transistor marker is formed on said catheter tube portion corresponding to said side opening.
Claim 3
Dependent Claim 16 words
A catheter according to claim 1, wherein at least one port is added to said hub.
Claim 4
Dependent Claim 43 words
A catheter according to claim 1, characterized in that at least part of a distal end portion in front of said catheter tube portion corresponding to the side opening has an outer diameter substantially equal to that of said other catheter tube portions.
Claim 5
Dependent Claim 14 words
A catheter according to claim 1, wherein said expansion holder has a herical shape.
Claim 6
Dependent Claim 17 words
A catheter according to claim 1, wherein said expansion holder consists of a unidirectional shape memory alloy.
Claim 7
Dependent Claim 17 words
A catheter according to claim 1, wherein said expansion holder consists of a bidirectional shape memory alloy.

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