Patent US3602296A successfully refreshed from Google Patents.
Patent US4883461A successfully refreshed from Google Patents.
US4883461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety needle sheath in anti-reflux catheter having novel valve means
Assignee: Interface Biomedical Laboratories Corp
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Filing: 1988-11-10
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Granted: 1989-11-28
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Expires: 2008-11-10
Abstract
Abstract Methods for preventing needle-stick injuries to healthcare workers during intravenous or intra-arterial procedures as well as for preventing catheter-contamination and blood clotting within the tip of the catheter. Also, novel fluid directing means and catheters which include integral fluid flow control means for use in these methods.
Inventors
- 👤 Philip N. Sawyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:49
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/36
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
315 words
A method for preventing needle-stick injuries when catheter means is introduced into or withdrawn from the vascular system of a patient during intravenous or intraarterial procedures as well as during disposal, storage or transportation of the catheter means which comprises: providing a catheter means having fluid flow control means and needle-enveloping means, said fluid flow control means comprising: a tubular structure including input means and output means, each provided with an open bore constituting a flow channel; valve means located between the bores of said input and output means of said tubular structure and having an open and closed position, said valve means providing for a connecting channel between said bores when said further means is in the open position, said further means normally being prestressed to said closed position and being forcible to said open position in response to a positive fluid pressure in the bore of either of said input or output means, said valve means being constructed and arranged so as to return to said closed position in response to a removal of said positive fluid pressure from said bore containing same; said needle-enveloping means including obturating means inserted into said tubular structure so as to render said valve means incompetent, needle means inserted into said obturating means, and receptacle means releasably securable to one end of said needle means; introducing the catheter means having said inserted obturating means and needle means into an organ or pleural cavity of a patient for removal of fluids therefrom; retracting the needle means within the overlying obturating means so that the obturating means envelops said needle means; and withdrawing simultaneously the retracted needle means and said obturating means with the needle means unexposed from within the tubular structure so that only said tubular structure remains in the organ or pleural cavity of said patient and said valve means remains competent in response to fluid reflux.
Claim 2
Independent Claim
315 words
A method for preventing needle-stick injuries when catheter means is introduced into or withdrawn from the vascular system of a patient during intravenous or intraarterial procedures as well as during disposal, storage or transportation of the catheter means which comprises: providing a catheter means having fluid flow control means and needle-enveloping means, said fluid flow control means comprising: a tubular structure including input means and output means, each provided with an open bore constituting a flow channel; valve means located between the bores of said input and output means of said tubular structure and having an open and closed position, said valve means providing for a connecting channel between said bores when said further means is in the open position, said further means normally being prestressed to said closed position and being forcible to said open position in response to a positive fluid pressure in the bore of either of said input or output means, said valve means being constructed and arranged so as to return to said closed position in response to a removal of said positive fluid pressure from said bore containing same; said needle-enveloping means including obturating means inserted into said tubular structure so as to render said valve means incompetent, needle means inserted into said obturating means, and receptacle means releasably securable to one end of said needle means; introducing the catheter means having said inserted obturating means and needle means into an organ or pleural cavity of a patient for removal of fluids therefrom; retracting the needle means within the overlying obturating means so that the obturating means envelops said needle means; and withdrawing simultaneously the retracted needle means and said obturating means with the needle means unexposed from within the tubular structure so that only said tubular structure remains in the organ or pleural cavity of said patient and said valve means remains competent in response to fluid reflux.
Claim 3
Dependent Claim
30 words
The method of claim 1 which further comprises making the obturating means of a material which will not stick to said valve means to facilitate insertion thereinto and removal therefrom.
Claim 4
Dependent Claim
18 words
The method of claim 1 wherein said valve means comprises a tube having a flexible plastic disc therein.
Claim 5
Dependent Claim
38 words
The method of claim 1 wherein the needle means is double-ended in order to permit piercing of the skin of a patient with the end of said needle means opposite said end having said releasably securable receptacle means.
Claim 6
Dependent Claim
29 words
The method of claim 1 wherein the end of the tubular structure opposite the releasably securable receptacle means includes a plurality of apertures to facilitate fluid collection or removal.
Claim 7
Dependent Claim
30 words
The method of claim 1 wherein said needle means is retracted half-way within said obturating means before the needle means and obturating means are simultaneously withdrawn from the tubular structure.
Claim 8
Independent Claim
314 words
A method for preventing needle stick injuries when catheter means is introduced into or withdrawn from the vascular system of a patient during intravenous or intraarterial procedures as well as during disposal, storage or transportation of the catheter means which comprises: p1 providing a catheter means having fluid flow control means and needle-enveloping means, said fluid flow control means comprising: a tubular structure including input means and output means, each provided with an open bore constituting a flow channel; valve means located between the bores of said input and output means of said tubular structure and having an open and closed position, said valve means providing for a connecting channel between said bores when said valve means is in the open position, said valve means normally being prestressed to said closed position and being forcible to said open position in response to a positive fluid pressure in the bore of either of said input or output means, said valve means being constructed and arranged so as to return to said closed position in response to a removal of said positive fluid pressure from said bore containing same; said needle-enveloping means including obturating means inserted into said tubular structure so as to render said fluid flow control means incompetent, needle means inserted into said obturating means, and receptacle means releasably secured to one end of said needle means; introducing the catheter means with said inserted obturating means and needle means into a blood vessel of a patient for removal of blood therefrom; retracting the needle means within the overlying obturating means so that the obturating means envelops said needle means; and withdrawing simultaneously the retracted needle means and said obturating means with needle means unexposed from within the tubular structure so that only said tubular structure remains in the blood vessel of said patient and said valve means remains competent in response to blood reflux.
Claim 9
Independent Claim
314 words
A method for preventing needle stick injuries when catheter means is introduced into or withdrawn from the vascular system of a patient during intravenous or intraarterial procedures as well as during disposal, storage or transportation of the catheter means which comprises: p1 providing a catheter means having fluid flow control means and needle-enveloping means, said fluid flow control means comprising: a tubular structure including input means and output means, each provided with an open bore constituting a flow channel; valve means located between the bores of said input and output means of said tubular structure and having an open and closed position, said valve means providing for a connecting channel between said bores when said valve means is in the open position, said valve means normally being prestressed to said closed position and being forcible to said open position in response to a positive fluid pressure in the bore of either of said input or output means, said valve means being constructed and arranged so as to return to said closed position in response to a removal of said positive fluid pressure from said bore containing same; said needle-enveloping means including obturating means inserted into said tubular structure so as to render said fluid flow control means incompetent, needle means inserted into said obturating means, and receptacle means releasably secured to one end of said needle means; introducing the catheter means with said inserted obturating means and needle means into a blood vessel of a patient for removal of blood therefrom; retracting the needle means within the overlying obturating means so that the obturating means envelops said needle means; and withdrawing simultaneously the retracted needle means and said obturating means with needle means unexposed from within the tubular structure so that only said tubular structure remains in the blood vessel of said patient and said valve means remains competent in response to blood reflux.
Claim 10
Dependent Claim
42 words
The method of claim 7 wherein the needle means is double-ended in order to permit insertion of a first end of the needle into the blood vessel of a patient with the second end capable of releasably securing the receptacle means thereto.
Claim 11
Dependent Claim
29 words
The method of claim 7 wherein the end of the tubular structure opposite the releasably secured receptacle means includes a plurality of apertures to facilitate blood collection or removal.
Claim 12
Dependent Claim
46 words
The method of claim 7 wherein the obturating means and needle means are simultaneously withdrawn from within the tubular structure after said needle means has first been retracted half-way within the obturating means so as to avoid blood contact with the user of the catheter means.
Claim 13
Dependent Claim
33 words
The method of claim 7 wherein an intravenous system is attached to the tubular means for introduction of fluids through said tubular structure after withdrawal of the obturating means and needle means therefrom.
Claim 14
Dependent Claim
33 words
The method of claim 7 wherein the receptacle means includes a vacuum therein to collect blood through the needle means when the catheter means is inserted into a blood vessel of the patient.
Claim 15
Dependent Claim
232 words
Fluid flow control means comprising: tubular means having input means and output means, each provided with an open bore constituting a flow channel, valve means located between the bores of said input and output means of said tubular structure and having an open and closed position, said valve means providing for a connecting channel between said bores when said valve means is in the open position, said valve means normally being prestressed to said closed position and being forcible to said open position in response to a positive fluid pressure in the bore of either of said input or output means, said valve means being constructed and arranged so as to return to said closed position in response to a removal of said positive fluid pressure from said bore containing same; obturating means, inserted into said tubular means so as to render incompetent said valve means; and needle means having a first and second end, inserted into said obturating means to insert the fluid flow control means into an organ or the pleural cavity of a patient for removal of fluid therefrom, with the needle being retracted within the obturating means when the obturating means and needle means are simultaneously withdrawn from the tubular means, so that only the tubular means remains in the organ or pleural cavity of said patient and said valve means remains competent in response to fluid reflux.
Claim 16
Dependent Claim
232 words
Fluid flow control means comprising: tubular means having input means and output means, each provided with an open bore constituting a flow channel, valve means located between the bores of said input and output means of said tubular structure and having an open and closed position, said valve means providing for a connecting channel between said bores when said valve means is in the open position, said valve means normally being prestressed to said closed position and being forcible to said open position in response to a positive fluid pressure in the bore of either of said input or output means, said valve means being constructed and arranged so as to return to said closed position in response to a removal of said positive fluid pressure from said bore containing same; obturating means, inserted into said tubular means so as to render incompetent said valve means; and needle means having a first and second end, inserted into said obturating means to insert the fluid flow control means into an organ or the pleural cavity of a patient for removal of fluid therefrom, with the needle being retracted within the obturating means when the obturating means and needle means are simultaneously withdrawn from the tubular means, so that only the tubular means remains in the organ or pleural cavity of said patient and said valve means remains competent in response to fluid reflux.
Claim 17
Dependent Claim
46 words
The fluid flow control means of claim 13 wherein said needle means comprises a first end and a second end, the first end being inserted into the organ or pleural cavity of the patient, with the second end capable of releasably securing said receptacle means thereto.
Claim 18
Dependent Claim
53 words
The fluid flow control means of claim 14 wherein the tubular means comprises a first end and a second end, the first end of said tubular means being inserted into the organ or pleural cavity of the patient, wherein said first end comprises a plurality of apertures to facilitate fluid collection or removal.
Claim 19
Dependent Claim
18 words
The fluid flow control means of claim 13 wherein said valve means is integral with said tubular means.
Claim 20
Dependent Claim
36 words
The fluid flow control means of claim 13 wherein said needle means is enveloped by said obturating means when said needle means is retracted within the overlying obturating means so that the needle means is unexposed.
Claim 21
Dependent Claim
21 words
The fluid flow control means of claim 13 wherein said valve means includes a disc member position within a flexible tube.
Claim 22
Dependent Claim
21 words
The fluid flow control means of claim 13 wherein said obturating means is a trocar which houses said needle means therein.
Claim 23
Dependent Claim
25 words
The fluid flow control means of claim 13 wherein said trocar includes means for preventing insertion of said needle means beyond a predetermined distance therein.
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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) | 1992-11-27 | 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 |