Patent US3727613A successfully refreshed from Google Patents.
US3727613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety catheter placement assembly
Assignee: LE VOY S INC US
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Filing: 1970-10-09
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Granted: 1973-04-17
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Expires: 1990-10-09
Abstract
Abstract Safe placement of a flexible catheter is enabled by (a) novel positive connection of the separable parts and (b) by unique indicating means. A syringe has a functionally integral needle and provides a convenient handle to which the catheter sheathing the needle is releaseably attached by a smoothly operating twist lock against inadvertent separation during venipuncture and catheter placement manipulation. After venipuncture catheter placement free from danger of damaging a blood vessel lumen wall is effected by advancement of the catheter tip into sheathed relation to the leading end of the needle serving as a stiffener to facilitate advance of the catheter within the lumen. Cooperating means respective associated with the catheter and with the needle and remaining exposed after the catheter and sheathed needle have entered the lumen provide indication of the relative longitudinal position of the catheter end and needle tip, and may also helpfully indicate whether the catheter and needle are safely interconnected against unintentional longitudinal displacement as well as a condition of relative freedom for separation when it is desired to withdraw the needle from the catheter.
Inventors
- 👤 J Sorenson
- 👤 K Pannier
- 👤 G Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:17
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/06; A61M25/0606
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
293 words
An assembly including a flexible catheter having a leading end and a relatively stiff needle therein retractably extendible with a sharp tip of the needle projectable in advance of said leading end to facilitate venipuncture, and comprising: a hub on said catheter; a hub on said needle; spiral thread means fixed with respect to one of said hubs; lug means fixed on the other of said hubs interengaging and cooperative with said thread means; said thread and lug means effecting connection of said needle and catheter through said hubs and relative axial shifting of the catheter on the needle by turning of the catheter hub, whereby in one relative assembled relationship of the catheter and needle determined by said thread and lug means the needle tip projects in advance of the leading end of the catheter until venipuncture has been effected, said thread means and lug means then functioning by turning of the catheter hub relative to the needle hub to advance the catheter relative to the needle until the leading end of the catheter protectively covers the tip of the needle; said thread and lug means being of sufficient length to remain positively connected after turning of said catheter hub and the catheter to advance said leading end into covering relation to said needle tip, whereby safe advance of the catheter within a blood vessel lumen can be effected utilizing the needle and tip as a stiffener within the catheter; and cooperative indicators spaced from said thread means and lug means and associated with said hubs to show that said thread and lug means remain positively engaged, and to provide readily observable assurance of said catheter end fully covering said needle tip although the tip and end are concealed within a puncture.
Claim 2
Dependent Claim
293 words
An assembly including a flexible catheter having a leading end and a relatively stiff needle therein retractably extendible with a sharp tip of the needle projectable in advance of said leading end to facilitate venipuncture, and comprising: a hub on said catheter; a hub on said needle; spiral thread means fixed with respect to one of said hubs; lug means fixed on the other of said hubs interengaging and cooperative with said thread means; said thread and lug means effecting connection of said needle and catheter through said hubs and relative axial shifting of the catheter on the needle by turning of the catheter hub, whereby in one relative assembled relationship of the catheter and needle determined by said thread and lug means the needle tip projects in advance of the leading end of the catheter until venipuncture has been effected, said thread means and lug means then functioning by turning of the catheter hub relative to the needle hub to advance the catheter relative to the needle until the leading end of the catheter protectively covers the tip of the needle; said thread and lug means being of sufficient length to remain positively connected after turning of said catheter hub and the catheter to advance said leading end into covering relation to said needle tip, whereby safe advance of the catheter within a blood vessel lumen can be effected utilizing the needle and tip as a stiffener within the catheter; and cooperative indicators spaced from said thread means and lug means and associated with said hubs to show that said thread and lug means remain positively engaged, and to provide readily observable assurance of said catheter end fully covering said needle tip although the tip and end are concealed within a puncture.
Claim 3
Dependent Claim
27 words
An assembly according to claim 1, said indicators comprising mark means on one of said hubs and an edge cooperative therewith on the other of said hubs.
Claim 4
Dependent Claim
39 words
An assembly according to claim 2, including additional mark means on said one hub cooperative with said edge to indicate full separation of said thread and lug means to then enable free removal of the needle from the catheter.
Claim 5
Dependent Claim
14 words
An assembly according to claim 3, wherein said marks comprise annular respective differentiating marks.
Claim 6
Dependent Claim
45 words
An assembly according to claim 1, wherein said hubs are relatively telescopically related, the inner of said hubs having a mark thereon providing one of said indicators and the other of said hubs having an edge thereon providing the indicator thereof cooperative with said mark.
Claim 7
Dependent Claim
18 words
An assembly according to claim 5, said mark on the inner of said hubs comprising an annular groove.
Claim 8
Dependent Claim
51 words
An assembly according to claim 5, wherein said inner of said hubs has an additional indicator mark spaced from said first-mentioned indicator mark and cooperative with said edge to indicate full separation of said lug means from said thread means to enable smooth uninterrupted withdrawal of the needle from the catheter.
Claim 9
Dependent Claim
13 words
An assembly according to claim 5, said inner hub being on the catheter.
Claim 10
Dependent Claim
13 words
An assembly according to claim 5, said inner hub being on the needle.
Claim 11
Dependent Claim
249 words
In an assembly including a flexible catheter having a leading end and a relatively stiff hypodermic syringe needle within the catheter retractably extendible in the catheter with A sharp tip on one end of the needle projectable in advance of said leading end to facilitate venipuncture: a syringe barrel permanently attached to the opposite end of said needle and having a permanent hub; a permanent hub on the end of said catheter opposite to said leading end; said hubs being telescopically one within the other; means on said hubs providing releasable twist-lock connection of said hubs in relative rotary and axially movable assembly and with the catheter sheathing said needle; said connection enabling manipulation of said syringe barrel to advance said needle for venipuncture by said tip projecting in advance of said leading end; said connection having means of sufficient length to remain positively connected after turning of said catheter hub and the catheter to advance said leading end into protective relation over said needle tip so that by continued manipulation of the syringe barrel, safe insertion of the catheter into the lumen of the punctured blood vessel utilizing the needle as a stiffener for the catheter can be effected with full assurance that none of the assembly will separate unintentionally during push or pull manipulation; and observable guide indicators separate from said connection and cooperatively located on said hubs registering when said tip is fully sheathed within said catheter end and showing that said connection remains positively engaged.
Claim 12
Dependent Claim
249 words
In an assembly including a flexible catheter having a leading end and a relatively stiff hypodermic syringe needle within the catheter retractably extendible in the catheter with A sharp tip on one end of the needle projectable in advance of said leading end to facilitate venipuncture: a syringe barrel permanently attached to the opposite end of said needle and having a permanent hub; a permanent hub on the end of said catheter opposite to said leading end; said hubs being telescopically one within the other; means on said hubs providing releasable twist-lock connection of said hubs in relative rotary and axially movable assembly and with the catheter sheathing said needle; said connection enabling manipulation of said syringe barrel to advance said needle for venipuncture by said tip projecting in advance of said leading end; said connection having means of sufficient length to remain positively connected after turning of said catheter hub and the catheter to advance said leading end into protective relation over said needle tip so that by continued manipulation of the syringe barrel, safe insertion of the catheter into the lumen of the punctured blood vessel utilizing the needle as a stiffener for the catheter can be effected with full assurance that none of the assembly will separate unintentionally during push or pull manipulation; and observable guide indicators separate from said connection and cooperatively located on said hubs registering when said tip is fully sheathed within said catheter end and showing that said connection remains positively engaged.
Claim 13
Dependent Claim
45 words
An assembly according to claim 10, including additional cooperating indicators on said hubs separate from said connection and registering when said catheter is further advanced on the needle until the twist-lock connection is released, to enable smooth uninterrupted withdrawal of said needle from said catheter.
Claim 14
Dependent Claim
71 words
An assembly according to claim 10, the outer of the telescoped hubs having an edge serving as an indicator, and the inner of said hubs having an indicating mark concealed within the outer of said hubs when the needle tip is projected in advance of said leading end of the catheter, but which registers with said edge when the catheter end is advanced into sheathing, stiffened relation to the needle tip.
Claim 15
Dependent Claim
46 words
An assembly according to claim 12, including another indicating mark on said inner of said hubs spaced from said first-mentioned mark and cooperative with said edge to indicate fully hub releasing relation of said twist-lock connection for smooth uninterrupted withdrawal of said needle from said catheter.
Claim 16
Dependent Claim
20 words
An assembly according to claim 13, both of said marks comprising respective annular grooves in said inner of said hubs.
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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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |