US4883468A
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: 1988-04-01
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Granted: 1989-11-28
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Expires: 2008-04-01
Abstract
Abstract Medical instrument introduction cannula, which is useful as a guide means for introducing and indwelling a rod-like material 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 00:50
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: 23
Claim 1
Independent Claim
127 words
A medical tool introduction cannula for introducing a rod-like medical tool into a living body, said introduction cannula comprising: a hollow tubular body made of a synthetic resin, a rod-like medical tool being insertable therethrough; said hollow tubular body having at least one portion which comprises a strip member made of a material different from other portions of said hollow tubular body, said strip member extending longitudinally over substantially the entire length of said hollow tubular body; and said strip member having a weld line formed therein, said weld line being bonded with a relatively weak force, and said weld line being longitudinally formed in said strip member to permit breaking of said strip member along said weld line in the longitudinal direction of said strip member.
Claim 2
Dependent Claim
127 words
A medical tool introduction cannula for introducing a rod-like medical tool into a living body, said introduction cannula comprising: a hollow tubular body made of a synthetic resin, a rod-like medical tool being insertable therethrough; said hollow tubular body having at least one portion which comprises a strip member made of a material different from other portions of said hollow tubular body, said strip member extending longitudinally over substantially the entire length of said hollow tubular body; and said strip member having a weld line formed therein, said weld line being bonded with a relatively weak force, and said weld line being longitudinally formed in said strip member to permit breaking of said strip member along said weld line in the longitudinal direction of said strip member.
Claim 3
Dependent Claim
44 words
An introduction cannula according to claim 1, wherein said hollow tubular body has a distal end which is machined to be in tight contact with an inner cannula inserted therethrough, and wherein said hollow tubular member has a base portion having an extended shape.
Claim 4
Dependent Claim
27 words
An introduction cannula according to claim 1, wherein said hollow tubular body comprises a pair of said strip members which are arranged to radially oppose each other.
Claim 5
Dependent Claim
13 words
An introduction cannula according to claim 1, wherein said strip member is colored.
Claim 6
Dependent Claim
18 words
An introduction cannula according to claim 1, wherein said other portions of said hollow tubular body are colored.
Claim 7
Dependent Claim
25 words
An introduction cannula according to claim 1, wherein said strip member and said other portions of said hollow tubular body are colored in different colors.
Claim 8
Dependent Claim
63 words
An introduction cannula according to claim 1, wherein a main portion of said hollow tubular body is formed of a material selected from the group consisting of polypropylene, polyethylene, and poly-4-methyl-pentene-1, and said strip member is formed of a material selected from the group consisting of a polypropylene/ethylene-vinyl acetate copolymer, polypropylene/polyethylene, a polyethylene/ethylene-vinyl acetate copolymer, a methylpentene polymer/ethylene-vinyl acetate copolymer, and methylpentene polymer/polyethylene.
Claim 9
Dependent Claim
133 words
A medical tool introduction cannula for introducing a rod-like medical tool into a living body, said introduction cannula comprising: a hollow tubular body made of a synthetic resin, a rod-like medical tool insertable therethrough; said hollow tubular body having at least one portion which comprises a strip member made of a material different from other portions of said hollow tubular body, said strip member extending longitudinally over substantially the entire length of said tubular body excluding a distal portion of said tubular body; and said strip member having a weld line formed therein, said weld line being bonded with a relatively weak force, and said weld line being longitudinally formed in said strip member to permit breaking of said strip member along said weld line in the longitudinal direction of said strip member.
Claim 10
Dependent Claim
133 words
A medical tool introduction cannula for introducing a rod-like medical tool into a living body, said introduction cannula comprising: a hollow tubular body made of a synthetic resin, a rod-like medical tool insertable therethrough; said hollow tubular body having at least one portion which comprises a strip member made of a material different from other portions of said hollow tubular body, said strip member extending longitudinally over substantially the entire length of said tubular body excluding a distal portion of said tubular body; and said strip member having a weld line formed therein, said weld line being bonded with a relatively weak force, and said weld line being longitudinally formed in said strip member to permit breaking of said strip member along said weld line in the longitudinal direction of said strip member.
Claim 11
Dependent Claim
42 words
An introduction cannula according to 8, wherein said distal end of said hollow tubular body is machined to be in tight contact with an inner cannula inserted therethrough, and wherein said hollow tubular member has a base portion having an extended shape.
Claim 12
Dependent Claim
42 words
An introduction cannula according to 8, wherein said distal end of said hollow tubular body is machined to be in tight contact with an inner cannula inserted therethrough, and wherein said hollow tubular member has a base portion having an extended shape.
Claim 13
Dependent Claim
27 words
An introduction cannula according to claim 40, wherein said hollow tubular body comprises a pair of said strip members which are arranged to radially oppose each other.
Claim 14
Dependent Claim
13 words
An introduction cannula according to claim 8, wherein said strip member is colored.
Claim 15
Dependent Claim
18 words
An introduction cannula according to claim 8, wherein said other portions of said hollow tubular body are colored.
Claim 16
Dependent Claim
25 words
An introduction cannula according to claim 8, wherein said strip member and said other portions of said hollow tubular body are colored in different colors.
Claim 17
Dependent Claim
63 words
An introduction cannula according to claim 8, wherein a main portion of said hollow tubular body is formed of a material selected from the group consisting of polypropylene, polyethylene, and poly-4-methyl-pentene-1, and said strip member is formed of a material selected from the group consisting of a polypropylene/ethylene-vinyl acetate copolymer, polypropylene/polyethylene, a polyethylene/ethylene-vinyl acetate copolymer, a methylpentene polymer/ethylene-vinyl acetate copolymer, and methylpentene polymer/polyethylene.
Claim 18
Dependent Claim
123 words
A medical instrument assembly comprising: (a) a medical tool introduction cannula for introducing a rod-like medical tool into a living body, said introduction cannula comprising: a hollow tubular body made of a synthetic resin, a rod-like medical tool being insertable therethrough; said hollow tubular body having at least one portion which comprises a strip member made of a material different from other portions of said hollow tubular body, said strip member extending longitudinally over substantially the entire length of said hollow tubular body; and (b) 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 19
Dependent Claim
123 words
A medical instrument assembly comprising: (a) a medical tool introduction cannula for introducing a rod-like medical tool into a living body, said introduction cannula comprising: a hollow tubular body made of a synthetic resin, a rod-like medical tool being insertable therethrough; said hollow tubular body having at least one portion which comprises a strip member made of a material different from other portions of said hollow tubular body, said strip member extending longitudinally over substantially the entire length of said hollow tubular body; and (b) 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 20
Dependent Claim
121 words
A medical instrument assembly comprising: (a) medical tool introduction cannula for introducing a rod-like medical tool into a living body, said introduction cannula comprising: a hollow tubular body made of a synthetic resin, a rod-like medical tool being insertable therethrough; said hollow tubular body having at least one portion which comprises a strip member made of a material different from other portions of said hollow tubular body, said strip member extending longitudinally over substantially the entire length of said tubular body excluding a distal portion of said tubular body; and (b) 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 21
Dependent Claim
121 words
A medical instrument assembly comprising: (a) medical tool introduction cannula for introducing a rod-like medical tool into a living body, said introduction cannula comprising: a hollow tubular body made of a synthetic resin, a rod-like medical tool being insertable therethrough; said hollow tubular body having at least one portion which comprises a strip member made of a material different from other portions of said hollow tubular body, said strip member extending longitudinally over substantially the entire length of said tubular body excluding a distal portion of said tubular body; and (b) 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 22
Dependent Claim
121 words
A medical instrument assembly comprising: (a) medical tool introduction cannula for introducing a rod-like medical tool into a living body, said introduction cannula comprising: a hollow tubular body made of a synthetic resin, a rod-like medical tool being insertable therethrough; said hollow tubular body having at least one portion which comprises a strip member made of a material different from other portions of said hollow tubular body, said strip member extending longitudinally over substantially the entire length of said tubular body excluding a distal portion of said tubular body; and (b) 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 23
Dependent Claim
121 words
A medical instrument assembly comprising: (a) medical tool introduction cannula for introducing a rod-like medical tool into a living body, said introduction cannula comprising: a hollow tubular body made of a synthetic resin, a rod-like medical tool being insertable therethrough; said hollow tubular body having at least one portion which comprises a strip member made of a material different from other portions of said hollow tubular body, said strip member extending longitudinally over substantially the entire length of said tubular body excluding a distal portion of said tubular body; and (b) 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.
References Cited (Backward Citations)
US3119392A
Cited
US3527859A
Cited
US3616990A
Cited
GB1381053A
Cited
EP0021446A1
Cited
US4402685A
Cited
WO1982003775A1
Cited
US4747833A
Cited
EP0238018A2
Cited
US4781690A
Cited
EP0245837A2
Cited
US4776846A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-27 | 1993-05-29 | 1993-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-27 | 1997-05-29 | 1997-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-27 | 2001-05-29 | 2001-11-28 | $7700.00 | Window Closed / Lapsed |