US4565545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter insertion device
Assignee: Terumo Corp
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Filing: 1985-04-23
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Granted: 1986-01-21
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Expires: 2005-04-23
Abstract
Abstract Since a typical catheter insertion device is used for percutaneous insertion of a catheter into an artery or a vein located in a deep part of a tissue, it is necessary to secure a sufficient lumen for introducing the catheter while alleviating pain inflicted on the patient when the catheter insertion device punctures the artery or the vein. The catheter insertion device of the invention has a tapered portion formed in the vicinity of a beveled surface of an inner needle in order to realize both necessary functions. Accordingly, it is possible to decrease the size of the incision in the tissue because it is formed by the beveled surface of the tapered needle point with a smaller diameter, and the desired objects can be accomplished by means of an elastic insertion of the catheter into the smaller incision and, at the same time, bleeding from the incision can be minimized.
Inventors
- 👤 Tatsuo Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:46
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/06; A61M25/065; A61M25/0606
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
257 words
In a catheter insertion device comprising an inner needle having a beveled surface at its distal end which forms a beveled point at said distal end; an inner needle hub attached to the proximal end of said inner needle; an outer catheter having an axially extending bore means for receiving said inner needle and adapted to receive said inner needle in said bore means so that said beveled point formed by said beveled surface is slightly projected from said outer catheter when said inner needle is inserted, and further having a catheter portion with a tapering outside diameter at its distal end; and a catheter hub attached to the proximal end of said outer catheter and adapted to detachably engage with said inner needle hub, the improvement comprising said inner needle has an inner needle tapered portion at the distal portion thereof, said beveled surface being partially formed in said inner needle tapered portion and forming said beveled point at said distal end of said needle, said inner needle tapered portion being longer than said beveled surface portion in the axial direction of said inner needle, wherein the width of said beveled surface is not more than 90% of the outside diameter of said inner needle and not less than 40% of the outside diameter of said outer catheter, the tapering angle of said inner needle tapered portion is from 4 to 16 degrees, and the length from the beveled point to the rear end of the inner needle tapered portion is not more than 4.5 mm.
Claim 2
Dependent Claim
257 words
In a catheter insertion device comprising an inner needle having a beveled surface at its distal end which forms a beveled point at said distal end; an inner needle hub attached to the proximal end of said inner needle; an outer catheter having an axially extending bore means for receiving said inner needle and adapted to receive said inner needle in said bore means so that said beveled point formed by said beveled surface is slightly projected from said outer catheter when said inner needle is inserted, and further having a catheter portion with a tapering outside diameter at its distal end; and a catheter hub attached to the proximal end of said outer catheter and adapted to detachably engage with said inner needle hub, the improvement comprising said inner needle has an inner needle tapered portion at the distal portion thereof, said beveled surface being partially formed in said inner needle tapered portion and forming said beveled point at said distal end of said needle, said inner needle tapered portion being longer than said beveled surface portion in the axial direction of said inner needle, wherein the width of said beveled surface is not more than 90% of the outside diameter of said inner needle and not less than 40% of the outside diameter of said outer catheter, the tapering angle of said inner needle tapered portion is from 4 to 16 degrees, and the length from the beveled point to the rear end of the inner needle tapered portion is not more than 4.5 mm.
Claim 3
Dependent Claim
29 words
A catheter insertion device as defined in claim 1, wherein the width of said beveled surface is not more than 80% of the outside diameter of said inner needle.
Claim 4
Dependent Claim
31 words
A catheter insertion device as defined in claim 1 or 2, wherein the width of said beveled surface is not less than 50% of the outside diameter of said outer catheter.
Claim 5
Dependent Claim
25 words
A catheter insertion device as defined in claim 1, wherein the tapering angle of said inner needle tapered portion is from 8 to 10 degrees.
Claim 6
Dependent Claim
22 words
A catheter insertion device as defined in claim 1, wherein said inner needle tapered portion is in the form of truncated cone.
Claim 7
Dependent Claim
55 words
A catheter insertion device as defined in claim 1, wherein said inner needle tapered portion is in the form of an odd-shaped cylinder one substantial half of whose cross section is inwardly flattened so that the flatness becomes gradually larger toward the beveled point and the other substantial half of whose cross section is semicircular.
Claim 8
Dependent Claim
27 words
A catheter insertion device as defined in claim 1, wherein said beveled surface is in the form of an oblique cut through said inner needle tapered portion.
Claim 9
Dependent Claim
261 words
In a catheter insertion device comprising an inner needle having a beveled surface at its distal end which forms a beveled point at said distal end; an inner needle hub attached to the proximal end of said inner needle; an outer catheter having an axially extending bore means removably receiving said inner needle and adapted to receive said inner needle in said bore means so that said beveled point formed by said beveled surface is slightly projected from said outer catheter when said inner needle is inserted, and further having a catheter tapered portion with a tapering outside diameter at its distal end; and a catheter hub attached to the proximal end of said outer catheter and adapted to detachably engage with said inner needle hub, the improvement comprising: said inner needle has an inner needle tapered portion formed in the vicinity of said beveled surface, wherein the width of said beveled surface is not more than 90% of the outside diameter of said inner needle and not less than 40% of the outside diameter of said outer catheter, the tapering angle of said inner needle tapered portion is from 4 to 16 degrees, and the length from the beveled point to the rear end of the inner needle tapered portion is not more than 4.5 mm; said inner needle having a smaller-diameter tubular portion slightly extending from said inner needle tapered portion toward the beveled point; and said beveled surface is in the form of an oblique cut through both said inner needle tapered portion and said smaller-diameter tubular portion.
Claim 10
Dependent Claim
261 words
In a catheter insertion device comprising an inner needle having a beveled surface at its distal end which forms a beveled point at said distal end; an inner needle hub attached to the proximal end of said inner needle; an outer catheter having an axially extending bore means removably receiving said inner needle and adapted to receive said inner needle in said bore means so that said beveled point formed by said beveled surface is slightly projected from said outer catheter when said inner needle is inserted, and further having a catheter tapered portion with a tapering outside diameter at its distal end; and a catheter hub attached to the proximal end of said outer catheter and adapted to detachably engage with said inner needle hub, the improvement comprising: said inner needle has an inner needle tapered portion formed in the vicinity of said beveled surface, wherein the width of said beveled surface is not more than 90% of the outside diameter of said inner needle and not less than 40% of the outside diameter of said outer catheter, the tapering angle of said inner needle tapered portion is from 4 to 16 degrees, and the length from the beveled point to the rear end of the inner needle tapered portion is not more than 4.5 mm; said inner needle having a smaller-diameter tubular portion slightly extending from said inner needle tapered portion toward the beveled point; and said beveled surface is in the form of an oblique cut through both said inner needle tapered portion and said smaller-diameter tubular portion.
Claim 11
Dependent Claim
254 words
In a catheter insertion device comprising an inner needle having a beveled surface at its distal end which forms a beveled point at said distal end; an inner needle hub attached to the proximal end of said inner needle; an outer catheter having an axially extending bore means removably receiving said inner needle and adapted to receive said inner needle in said bore means so that said beveled point formed by said beveled surface is slightly projected from said outer catheter when said inner needle is inserted, and further having a catheter tapered portion with a tapering outside diameter at its distal end; and a catheter hub attached to the proximal end of said outer catheter and adapted to detachably engage with said inner needle hub, the improvement comprising: said inner needle has an inner needle tapered portion formed in the vicinity of said beveled surface, wherein the width of said beveled surface is not more than 90% of the outside diameter of said inner needle and not less than 40% of the outside diameter of said outer catheter, the tapering angle of said inner needle tapered portion is from 4 to 16 degrees, and the length from the beveled point to the rear end of the inner needle tapered portion is not more than 4.5 mm; said inner needle having a smaller-diameter tubular portion slightly extending from said inner needle tapered portion toward the beveled point; and said beveled surface is in the form of an oblique cut through said smaller-diameter tubular portion.
Claim 12
Dependent Claim
254 words
In a catheter insertion device comprising an inner needle having a beveled surface at its distal end which forms a beveled point at said distal end; an inner needle hub attached to the proximal end of said inner needle; an outer catheter having an axially extending bore means removably receiving said inner needle and adapted to receive said inner needle in said bore means so that said beveled point formed by said beveled surface is slightly projected from said outer catheter when said inner needle is inserted, and further having a catheter tapered portion with a tapering outside diameter at its distal end; and a catheter hub attached to the proximal end of said outer catheter and adapted to detachably engage with said inner needle hub, the improvement comprising: said inner needle has an inner needle tapered portion formed in the vicinity of said beveled surface, wherein the width of said beveled surface is not more than 90% of the outside diameter of said inner needle and not less than 40% of the outside diameter of said outer catheter, the tapering angle of said inner needle tapered portion is from 4 to 16 degrees, and the length from the beveled point to the rear end of the inner needle tapered portion is not more than 4.5 mm; said inner needle having a smaller-diameter tubular portion slightly extending from said inner needle tapered portion toward the beveled point; and said beveled surface is in the form of an oblique cut through said smaller-diameter tubular portion.
References Cited (Backward Citations)
DE711902C
Cited
US2830587A
Cited
US3094122A
Cited
US3308822A
Cited
US3633580A
Cited
US3788320A
Cited
FR2481931A1
Cited
US4335718A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-20 | 1989-07-22 | 1990-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-20 | 1993-07-22 | 1994-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-20 | 1997-07-22 | 1998-01-21 | $7700.00 | Window Closed / Lapsed |