Patent US3955573A successfully refreshed from Google Patents.
US3955573A
Expired / Lapsed
US
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Anticoagulant delivery device and method
Assignee: Sorenson Research Co Inc
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Filing: 1974-10-11
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Granted: 1976-05-11
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Expires: 1994-10-11
Abstract
Abstract An anticoagulant delivery device forming part of an aspiration wand and method for use in connection with autologous blood transfusion wherein an anticoagulant is delivered to and intimately mixed with aspirated blood in the vicinity of the aspiration tip of the wand.
Inventors
- 👤 A. Boyd Hansen
- 👤 Gordon S. Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:39
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/36; A61M1/3672; A61M1/84; A61M1/85; A61M2202/00; A61M2202/04; A61M2202/0413; Y; Y10; Y10S; Y10S604/00; Y10S604/902
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
119 words
An anticoagulant delivery device for aspirating and treating blood comprising in combination: a hollow conduit, the hollow of the conduit having a vacuum applied thereto and defining a pathway for the transport of aspirated blood; a perforated tip joined to the conduit and comprising a passageway facilitating aspiration of blood into the hollow of the conduit; a mixing chamber comprising a housing having means for altering laminar flow of aspirated blood so as to create mixing turbulence therein, said mixing chamber being interposed between the conduit and the perforated tip; and means for delivering anticoagulant in the vicinity of the tip upstream from the mixing chamber whereby the anticoagulant is caused to be thoroughly mixed with the aspirated blood.
Claim 2
Dependent Claim
119 words
An anticoagulant delivery device for aspirating and treating blood comprising in combination: a hollow conduit, the hollow of the conduit having a vacuum applied thereto and defining a pathway for the transport of aspirated blood; a perforated tip joined to the conduit and comprising a passageway facilitating aspiration of blood into the hollow of the conduit; a mixing chamber comprising a housing having means for altering laminar flow of aspirated blood so as to create mixing turbulence therein, said mixing chamber being interposed between the conduit and the perforated tip; and means for delivering anticoagulant in the vicinity of the tip upstream from the mixing chamber whereby the anticoagulant is caused to be thoroughly mixed with the aspirated blood.
Claim 3
Dependent Claim
57 words
An anticoagulant delivery device as defined in claim 1 wherein said mixing chamber housing comprises means defining a cylindrical cavity having a diameter which is greater than the diameter of the conduit, and wherein said passageway of the perforated tip intersects the cylindrical cavity tangentially so that aspirated blood and anticoagulant form a vortex in the cavity.
Claim 4
Dependent Claim
29 words
An anticoagulant delivery device as defined in claim 1 wherein said mixing chamber comprises at least one baffle to develop turbulance sufficient to mix the aspirated blood and anticoagulant.
Claim 5
Dependent Claim
22 words
An anticoagulant delivery device as defined in claim 1 wherein said anticoagulant delivery means comprises a tube mounted exterior of the conduit.
Claim 6
Dependent Claim
39 words
An anticoagulant delivery device as defined in claim 1 wherein said anticoagulant delivery means comprises a tube carried within the conduit and terminating in a discharge port rigidly secured adjacent the junction of the tip and mixing chamber housing.
Claim 7
Dependent Claim
41 words
An anticoagulant delivery device as defined in claim 1 wherein said mixing chamber housing is an initially separate segment having a coupling site at each end, one end being joined to the conduit and the other end to the perforated tip.
Claim 8
Dependent Claim
24 words
An anticoagulant delivery device as defined in claim 1 wherein said mixing chamber housing and said conduit are integrally joined into a one-piece unit.
Claim 9
Independent Claim
120 words
A method of combining aspirated blood from a patient with anticoagulant in a hollow conduit, the conduit comprising a hollow perforated tip and a mixing chamber immediately downstream from the tip comprising the steps of: connecting the conduit to a vacuum source so as to provide negative pressure at the perforated tip; delivering an anticoagulant to the conduit in the vicinity of the tip and upstream from the mixing chamber; and inserting the tip into a blood source thereafter forcing the blood and anticoagulant over a convoluted path in the mixing chamber to create turbulent flow and mix anticoagulant with the blood prior to its traversal through the conduit so asa to minimize clotting of the blood in the conduit.
Claim 10
Independent Claim
120 words
A method of combining aspirated blood from a patient with anticoagulant in a hollow conduit, the conduit comprising a hollow perforated tip and a mixing chamber immediately downstream from the tip comprising the steps of: connecting the conduit to a vacuum source so as to provide negative pressure at the perforated tip; delivering an anticoagulant to the conduit in the vicinity of the tip and upstream from the mixing chamber; and inserting the tip into a blood source thereafter forcing the blood and anticoagulant over a convoluted path in the mixing chamber to create turbulent flow and mix anticoagulant with the blood prior to its traversal through the conduit so asa to minimize clotting of the blood in the conduit.
Claim 11
Dependent Claim
37 words
A method of combining aspirated blood with anticoagulant as defined in claim 8 wherein said mixing step comprises creating a vortex of blood and anticoagulant upon aspiration of the blood and prior to traversal through the conduit.
Claim 12
Dependent Claim
32 words
A method of combining aspirated blood with anticoagulant as defined in claim 8 wherein said mixing step comprises channelling blood and anticoagulant across a tortuous path defined by at least one baffle.
Claim 13
Dependent Claim
110 words
An anticoagulant delivery device for aspirating and treating a patient's blood comprising: an aspiration wand having a perforated leading tip and a handle joined to the tip, the handle and tip presenting an elongated blood-carrying conduit and means for imposing a vacuum at the perforated tip and along the conduit; means for delivering anticoagulant from a remote source to the wand near the tip; and a mixing chamber mounted upon the handle downstream from the tip, the mixing chamber having a housing comprising means for significantly increasing turbulence within the conduit so as to intimately mix the anticoagulant and aspirated blood after the blood enters the tip of the wand.
Claim 14
Dependent Claim
110 words
An anticoagulant delivery device for aspirating and treating a patient's blood comprising: an aspiration wand having a perforated leading tip and a handle joined to the tip, the handle and tip presenting an elongated blood-carrying conduit and means for imposing a vacuum at the perforated tip and along the conduit; means for delivering anticoagulant from a remote source to the wand near the tip; and a mixing chamber mounted upon the handle downstream from the tip, the mixing chamber having a housing comprising means for significantly increasing turbulence within the conduit so as to intimately mix the anticoagulant and aspirated blood after the blood enters the tip of the wand.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-11 | 1979-11-10 | 1980-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-11 | 1983-11-10 | 1984-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-11 | 1987-11-10 | 1988-05-11 | $7700.00 | Window Closed / Lapsed |