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Patent US4874374A successfully refreshed from Google Patents.
US4874374A
Expired / Lapsed
US
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Medical tool introduction cannula and method of manufacturing the same
Assignee: Terumo Corp
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Filing: 1989-03-28
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Granted: 1989-10-17
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Expires: 2009-03-28
Abstract
Abstract Medical instrument introduction cannula, which is useful as a guide means for introducing and indwelling a rod-like medical instrument such as a catheter and a guide wire. This cannula is removed after use from the medical instrument by being splitted. This cannula is formed of a hollow tubular body having a strip member consisting of a material different from the other portion of the tubular body, which extends over the entire or almost the entire length of the tubular body. The strip member has a weld line along the length of the strip member, or consists of a resin which exhibits a good bonding property only to one of the other components forming the tubular body. The tubular body can be splitted by way of the weld line or the removal of the strip member having such a bonding property. The method of manufacturing the medical instrument introduction cannular by a two-color extruder is also disclosed.
Inventors
- 👤 Tadashi Kousai
- 👤 Toshinobu Ishida
- 👤 Yousuke Moriuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:07
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/06; A61M25/0662; A61M25/0668; A61M25/0009; B; B29; B29C; B29C48/00; B29C48/03; B29C48/09; B29C48/16; B29C48/18; B29C48/21; B29C48/25; B29C48/30; B29C48/32; B29C48/335; B29L; B29L2031/00; B29L2031/753; B29L2031/7542
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
141 words
A medical tool introduction cannula for introducing a rod-like medical tool such as a catheter into a living body, wherein said introduction cannula comprises: a tubular body having a longitudinal hollow portion for receiving said medical tool therethrough; a plurality of strip members in said tubular body, and which are liquid-tightly integrated to extend along a longitudinal direction of said tubular body; one of said strip members comprising a molded body of a mixture of ethylene-vinyl acetate copolymer and polypropylene mixed at a weight ratio of 1:1 to 1:5; and another of said strip members disposed adjacent to and extending along said one strip member, and comprising a molded body of polypropylene; said one strip member and said another strip member being bonded with a strength that allows said strip member to be separated from said another strip member by hand.
Claim 2
Dependent Claim
141 words
A medical tool introduction cannula for introducing a rod-like medical tool such as a catheter into a living body, wherein said introduction cannula comprises: a tubular body having a longitudinal hollow portion for receiving said medical tool therethrough; a plurality of strip members in said tubular body, and which are liquid-tightly integrated to extend along a longitudinal direction of said tubular body; one of said strip members comprising a molded body of a mixture of ethylene-vinyl acetate copolymer and polypropylene mixed at a weight ratio of 1:1 to 1:5; and another of said strip members disposed adjacent to and extending along said one strip member, and comprising a molded body of polypropylene; said one strip member and said another strip member being bonded with a strength that allows said strip member to be separated from said another strip member by hand.
Claim 3
Dependent Claim
20 words
The medical tool introduction cannula of claim 1, wherein said weight ratio is within the range of 1:3 to 1:5.
Claim 4
Dependent Claim
19 words
The medical tool introduction cannula of claim 1, wherein said one strip member is made of a colored material.
Claim 5
Dependent Claim
19 words
The medical tool introduction cannula of claim 3, wherein said another strip member is made from a colored material.
Claim 6
Dependent Claim
19 words
The medical tool introduction cannula of claim 1, wherein said another strip member is made from a colored material.
Claim 7
Dependent Claim
26 words
The medical tool introduction cannula of claim 1, wherein said one strip member and said other strip member are made of colored materials having different colors.
Claim 8
Dependent Claim
182 words
A medical instrument assembly, comprising: an introduction cannula for introducing a rod-like medical tool such as a catheter into a living body, said introduction cannula comprising: a tubular body having a longitudinal hollow portion for receiving said medical tool therethrough; a plurality of strip members in said tubular body, and which are liquid-tightly integrated to extend along a longitudinal direction of said tubular body; one of said strip members comprising a molded body of a mixture of ethylene-vinyl acetate copolymer and polypropylene mixed at a weight ratio of 1:1 to 1:5; another of said strip members disposed adjacent to and extending along said one strip member, and comprising molded body of polypropylene; and said one strip member and said another strip member being bonded with a strength that allows said one strip member to be separated from said another strip member by hand; and a syringe having an inner cannula and detachably inserted into said medical tool introduction cannula such that a distal end of said inner cannula of said syringe projects from a tip end of said medical tool introduction cannula.
Claim 9
Dependent Claim
182 words
A medical instrument assembly, comprising: an introduction cannula for introducing a rod-like medical tool such as a catheter into a living body, said introduction cannula comprising: a tubular body having a longitudinal hollow portion for receiving said medical tool therethrough; a plurality of strip members in said tubular body, and which are liquid-tightly integrated to extend along a longitudinal direction of said tubular body; one of said strip members comprising a molded body of a mixture of ethylene-vinyl acetate copolymer and polypropylene mixed at a weight ratio of 1:1 to 1:5; another of said strip members disposed adjacent to and extending along said one strip member, and comprising molded body of polypropylene; and said one strip member and said another strip member being bonded with a strength that allows said one strip member to be separated from said another strip member by hand; and a syringe having an inner cannula and detachably inserted into said medical tool introduction cannula such that a distal end of said inner cannula of said syringe projects from a tip end of said medical tool introduction cannula.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-16 | 1993-04-17 | 1993-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-16 | 1997-04-17 | 1997-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-16 | 2001-04-17 | 2001-10-17 | $7700.00 | Window Closed / Lapsed |