Patent US2088832A successfully refreshed from Google Patents.
Patent EP0110117A2 successfully refreshed from Google Patents.
EP0144629A2
Expired / Lapsed
EP
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Catheter and method for making
Assignee: Terumo Corp
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Filing: 1984-10-11
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Granted: —
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Expires: 2004-10-11
Abstract
Abstract In a catheter comprising a proximal inner tube having a reinforcing layer applied thereto and a distal inner tube made of a material having different physical properties from those of the proximal inner tube. the proximal and distal inner tubes are axially integrally connected such that the outer surface of the proximal inner tube is substantially smooth and continuous to that of the distal inner tube, and a sheath continuously covers the proximal and distal inner tubes. The catheter is produced by axially integrally joining proximal and distal inner tubes and continuously covering the interconnected tubes with a sheath.
Inventors
- 👤 Susumu Tanabe
- 👤 Tatsuo Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 23:44
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0009; A61M25/001; A61M25/0012
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
83 words
A catheter comprising a body portion including a proximal inner tube and a reinforcing layer applied thereto, a tip portion including a distal inner tube axially interconnected to the body portion, the distal inner tube being made of a material having different physical properties from those of the proximal inner tube, a sheath continuously covering the body portion and the distal inner tube, wherein the outer surface of the body portion is substantially smooth and continuous to that of the distal inner tube.
Claim 2
Dependent Claim
83 words
A catheter comprising a body portion including a proximal inner tube and a reinforcing layer applied thereto, a tip portion including a distal inner tube axially interconnected to the body portion, the distal inner tube being made of a material having different physical properties from those of the proximal inner tube, a sheath continuously covering the body portion and the distal inner tube, wherein the outer surface of the body portion is substantially smooth and continuous to that of the distal inner tube.
Claim 3
Dependent Claim
23 words
The catheter according to claim 1 wherein the distal inner tube is made of a more flexible material than the proximal inner tube.
Claim 4
Dependent Claim
29 words
The catheter according to claim 2 wherein the proximal inner tube is made of a polyamide elastomer and the distal inner tube is made of a plasticized polyamide elastomer.
Claim 5
Dependent Claim
24 words
The catheter according to claim 1 wherein the distal inner tube is made of a more plastically deformable material than the proximal inner tube.
Claim 6
Dependent Claim
27 words
The catheter according to claim 4 wherein the proximal inner tube is made of a polyamide elastomer and the distal inner tube is made of a polyethylene.
Claim 7
Dependent Claim
12 words
The catheter according to claim 5 wherein the reinforcing layer is braided.
Claim 8
Dependent Claim
21 words
The catheter according to claim 1 wherein the reinforcing layer is formed in the outer surface of the proximal inner tube.
Claim 9
Dependent Claim
23 words
The catheter according to claim 7 wherein the reinforcing layer has an outer diameter substantially equal to that of the distal inner tube.
Claim 10
Dependent Claim
21 words
The catheter according to claim 1 wherein the material of which the distal inner tube is made contains a radiopaque substance.
Claim 11
Dependent Claim
21 words
The catheter according to claim 9 wherein the material of which the sheath is made does not contain any radiopaque substances.
Claim 12
Dependent Claim
17 words
The catheter according to claim 9 wherein the distal inner tube is made of a polyamide elastomer.
Claim 13
Dependent Claim
17 words
The catheter according to claim 1 wherein the reinforcing layer is embedded in the proximal inner tube.
Claim 14
Dependent Claim
21 words
The catheter according to claim 12 wherein the reinforcing layer is embedded in the proximal inner tube adjacent its outer surface.
Claim 15
Dependent Claim
33 words
The catheter according to claim 1 wherein the joint ends of the proximal and distal inner tubes have recesses in their inner surface and a joint tube is snugly fitted in the recesses.
Claim 16
Independent Claim
88 words
A method for producing a catheter comprising the steps of molding a proximal inner tube, applying a reinforcing layer to the proximal inner tube, molding a distal inner tube from a material having different physical properties from those of the proximal inner tube, axially interconnecting the proximal inner tube to the distal inner tube while the outer surface of the proximal inner tube is substantially smooth and continuous to that of the distal inner tube, and continuously covering the interconnected proximal and distal inner tubes with a sheath.
Claim 17
Independent Claim
88 words
A method for producing a catheter comprising the steps of molding a proximal inner tube, applying a reinforcing layer to the proximal inner tube, molding a distal inner tube from a material having different physical properties from those of the proximal inner tube, axially interconnecting the proximal inner tube to the distal inner tube while the outer surface of the proximal inner tube is substantially smooth and continuous to that of the distal inner tube, and continuously covering the interconnected proximal and distal inner tubes with a sheath.
Claim 18
Dependent Claim
56 words
The catheter producing method according to claim 15 wherein the reinforcing layer is applied to the proximal inner tube by winding reinforcing wires about the proximal inner tube and passing the proximal inner tube and wire braid through a heated die to thereby embed the wire braid in the proximal inner tube adjacent its outer surface.
Claim 19
Dependent Claim
57 words
The catheter producing method according to claim 15 wherein the reinforcing layer is applied to the proximal inner tube by winding reinforcing wires about the proximal inner tube and successively passing the proximal inner tube and wire braid through a heated die to thereby embed the wire braid in the proximal inner tube adjacent its outer surface.
Claim 20
Dependent Claim
101 words
The catheter producing method according to claim 15 wherein the step of axially interconnecting the distal inner.tube to the proximal inner tube having the reinforcing layer applied thereto comprises the steps of alternately connecting proximal inner tubes and distal inner tubes to form a length of tubing, continuously covering the entire length of tubing consisting of alternately connected proximal and distal inner tubes with a sheath, and cutting the length at positions approximately intermediate of the proximal inner tubes and positions approximately intermediate of the distal inner tubes into catheters each comprising a pair of proximal and distal inner tube sections.
References Cited (Backward Citations)
US3485234A
Cited
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