Patent US3814096B1 successfully refreshed from Google Patents.
US4385637A
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US
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Blood sampler
Assignee: Allegiance Corp
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Filing: 1980-12-29
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Granted: 1983-05-31
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Expires: 2000-12-29
Abstract
Abstract A device particularly suited for collecting and dispensing an arterial blood sample. A needle is connected to a flexible transparent tube that includes an air exit vent with a nonwet filter so air, but not blood, can exit the vent under arterial blood pressure. A special needle adapter prevents formation of air bubbles, and a baffle system in the needle minimizes blood and air mixing. A clamp on the reservoir pinches off an air contaminated blood segment and can longitudinally strip a different blood segment which is not air contaminated. The tubular reservoir has an oxygen blocking coating, and its internal surface includes a dry anticoagulant coating.
Inventors
- 👤 David S. Akhavi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:51
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/15; A61B5/153; A61B5/14; A61B5/1405; A61B5/150007; A61B5/150015; A61B5/15003; A61B5/150053; A61B5/150061; A61B5/150099; A61B5/150206; A61B5/150213; A61B5/150221; A61B5/150305; A61B5/150236; A61B5/150244
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
82 words
An arterial blood sampler comprising: a needle; a blood reservoir connected to the needle and having a gas therein, said reservoir being of a material pervious to blood gas; a coating on the reservoir that is substantially impervious to blood gas to reduce air in laboratory tests on collected blood; a vent on the reservoir through which gas can be expelled by means of arterial blood pressure; and valve means on the vent preventing the escape of arterial blood from the reservoir.
Claim 2
Dependent Claim
82 words
An arterial blood sampler comprising: a needle; a blood reservoir connected to the needle and having a gas therein, said reservoir being of a material pervious to blood gas; a coating on the reservoir that is substantially impervious to blood gas to reduce air in laboratory tests on collected blood; a vent on the reservoir through which gas can be expelled by means of arterial blood pressure; and valve means on the vent preventing the escape of arterial blood from the reservoir.
Claim 3
Dependent Claim
37 words
An arterial blood sampler as set forth in claim 1 wherein the reservoir comprises a material sufficiently flexible at 0° to be readily compressed to expel blood immediately after removal of the sampler from an ice bath.
Claim 4
Dependent Claim
16 words
An arterial blood sampler as set forth in claim 1, wherein the reservoir is of polyurethane.
Claim 5
Dependent Claim
32 words
An arterial blood sampler as set forth in claim 1, wherein said coating is on at least one surface of the reservoir, said coating being a copolymer of vinylidene chloride and acrylonitrile.
Claim 6
Dependent Claim
23 words
An arterial blood sampler as set forth in claim 4, where said copolymer coating is only on the inner surface of the reservoir.
Claim 7
Dependent Claim
111 words
An arterial blood sampler comprising: a needle having a hollow hub; a flexible plastic blood reservoir connected to a needle adapter having a tubular section that extends inside both the reservoir and the hollow hub of the needle, and the tubular section of the adapter has internally beveled ends so as to reduce turbulence of blood flow into the sampler; a coating on the reservoir that is substantially impervious to blood gas; and gas within the blood reservoir; a vent on the reservoir through which such gas can be expelled by means of arterial blood pressure; and valve means on the vent preventing the escape of arterial blood from the reservoir.
Claim 8
Dependent Claim
111 words
An arterial blood sampler comprising: a needle having a hollow hub; a flexible plastic blood reservoir connected to a needle adapter having a tubular section that extends inside both the reservoir and the hollow hub of the needle, and the tubular section of the adapter has internally beveled ends so as to reduce turbulence of blood flow into the sampler; a coating on the reservoir that is substantially impervious to blood gas; and gas within the blood reservoir; a vent on the reservoir through which such gas can be expelled by means of arterial blood pressure; and valve means on the vent preventing the escape of arterial blood from the reservoir.
Claim 9
Dependent Claim
24 words
An arterial blood sampler as set forth in claim 6, wherein the needle adapter has a threaded collar securing the needle to the adapter.
Claim 10
Dependent Claim
39 words
A blood sampler comprising: a needle; a flexible plastic reservoir of a material pervious to blood gas; and a blocking coating on at least one surface of the reservoir, which blocking coating is substantially impervious to blood gas transfer.
Claim 11
Dependent Claim
39 words
A blood sampler comprising: a needle; a flexible plastic reservoir of a material pervious to blood gas; and a blocking coating on at least one surface of the reservoir, which blocking coating is substantially impervious to blood gas transfer.
Claim 12
Dependent Claim
28 words
A blood sampler as set forth in claim 8, wherein the reservoir is of polyurethane, and the blocking coating is of a copolymer of vinylidene chloride and acrylonitrile.
Claim 13
Dependent Claim
22 words
A blood sampler as set forth in claim 9, wherein the coated reservoir has a Shore hardness of from 40 to 100.
Claim 14
Dependent Claim
53 words
A blood sampler comprising: a needle having a hub; a baffle within the needle hub; and a blood reservoir connected to the needle hub wherein the baffle includes a peripheral ring and a transverse bar diametrically joining opposite sides of the ring, which baffle can disperse incoming blood without substantially slowing blood flow.
Claim 15
Dependent Claim
53 words
A blood sampler comprising: a needle having a hub; a baffle within the needle hub; and a blood reservoir connected to the needle hub wherein the baffle includes a peripheral ring and a transverse bar diametrically joining opposite sides of the ring, which baffle can disperse incoming blood without substantially slowing blood flow.
Claim 16
Dependent Claim
44 words
A blood sampler as set forth in claim 11, wherein the needle has a cannula and the baffle has one or more openings that combine to form a passage at least as large as the cannula so as not to substantially restrict blood flow.
Claim 17
Dependent Claim
66 words
A needle comprising: a hub; a cannula attached to the hub; and a baffle in the hub, said baffle having one or more openings that combine to form a passage at least as large as the cannula's internal diameter so as not to substantially restrict blood flow and wherein the baffle includes a peripheral ring and a transverse bar diametrically joining opposite sides of the ring.
Claim 18
Dependent Claim
66 words
A needle comprising: a hub; a cannula attached to the hub; and a baffle in the hub, said baffle having one or more openings that combine to form a passage at least as large as the cannula's internal diameter so as not to substantially restrict blood flow and wherein the baffle includes a peripheral ring and a transverse bar diametrically joining opposite sides of the ring.
Claim 19
Dependent Claim
18 words
A needle as set forth in claim 13, wherein the hub has an internal groove retaining the baffle.
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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) | 1986-05-30 | 1986-11-29 | 1987-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-30 | 1990-11-29 | 1991-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-30 | 1994-11-29 | 1995-05-31 | $7700.00 | Window Closed / Lapsed |