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US4775360A
Expired / Lapsed
US
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Autologus blood methods and apparatus
Assignee: Lantech Inc
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Filing: 1987-01-09
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Granted: 1988-10-04
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Expires: 2007-01-09
Abstract
Abstract The present invention is directed to improved methods and apparatus for the collection of blood, which are particularly useful for autotransfusion purposes. The apparatus includes a conventional blood transfer bag which is in turn placed in fluid communication with an air-blood separator to form a collection system. This system is particularly adaptable for use in the surgical setting in that it can operate at high vacuum while minimizing hemolysis. This is accomplished by early separation of air from the blood as the blood is collected. The air-blood separator and the interior of the blood bag are placed in communication with a vacuum source. As a result, there is a pressure equalizing feature inherent within the device. This allows the blood to continue to flow through the device into the blood bag without extending or opening the blood bag. As a result, there is minimal air-blood interface as the blood enters the blood bag.
Inventors
- 👤 Perry L. Lane
- 👤 William D. Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:22
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/60; A61M1/604
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
149 words
An apparatus for collecting blood from a patient for reinfusion comprising: means for separating air from the blood collected for reinfusion; first conduit means for conveying the blood collected from the means for separating air from the blood to a blood collection receptacle; a blood collection receptacle having a blood inlet and a vacuum port, the blood receptacle being readily removably from the means for conveying the blood after receipt of blood and being capable of being maintained in a collapsed configuration prior to receipt of collected blood and the blood collection receptacle expanding from a collapsed configuration to an expanded configuration in relation to the amount of blood which has flowed into the receptacle and such that further contact between air and blood flowing into the receptacle is avoided; and second means for placing a source of vacuum in communication with the blood receptacle and the separating means.
Claim 2
Independent Claim
149 words
An apparatus for collecting blood from a patient for reinfusion comprising: means for separating air from the blood collected for reinfusion; first conduit means for conveying the blood collected from the means for separating air from the blood to a blood collection receptacle; a blood collection receptacle having a blood inlet and a vacuum port, the blood receptacle being readily removably from the means for conveying the blood after receipt of blood and being capable of being maintained in a collapsed configuration prior to receipt of collected blood and the blood collection receptacle expanding from a collapsed configuration to an expanded configuration in relation to the amount of blood which has flowed into the receptacle and such that further contact between air and blood flowing into the receptacle is avoided; and second means for placing a source of vacuum in communication with the blood receptacle and the separating means.
Claim 3
Dependent Claim
45 words
An apparatus for collecting blood from a patient for reinfusion as defined in claim 1, further comprising a source of vacuum, said source of vacuum being placed in communication with the separating means and the blood receptacle, such that pressures within the apparatus are equalized.
Claim 4
Dependent Claim
56 words
An apparatus for collecting blood from a patient for reinfusion as defined in claim 2 wherein the second means for placing a source of vacuum in communication with the blood receptacle comprises a vacuum return line in communication with the receptacle at one end and in communication with the source of vacuum at the other end.
Claim 5
Dependent Claim
34 words
An apparatus for collecting blood from a patient for reinfusion as defined in claim 3 further comprising at least one clamp attached to the vacuum return line capable of closing said vacuum return line.
Claim 6
Dependent Claim
27 words
An apparatus for collecting blood from a patient for reinfusion as defined in claim 1 wherein said means for separating comprises an air-blood separator comprising a housing.
Claim 7
Dependent Claim
44 words
An apparatus for collecting blood from a patient for reinfusion as defined in claim 5 wherein the means for conveying blood collected comprises a feed line connected at one end to the air-blood separator and at the other end to the blood collection receptacle.
Claim 8
Dependent Claim
32 words
An apparatus for collecting blood from a patient for reinfusion as defined in claim 6 further comprising at least one clamp attached to the feed line capable of closing said feed line.
Claim 9
Dependent Claim
66 words
An apparatus for collecting blood from a patient for reinfusion as defined in claim 1 wherein said air-blood separator comprises a base and a connection capable of being attached to a blood supply, a connection capable of being attached to a source of vacuum and a connection, near the base of the separator, capable of being attached to the means for conveying blood to the receptacle.
Claim 10
Dependent Claim
43 words
An apparatus for collecting blood from a patient for reinfusion as defined in claim 8 wherein the air-blood separator further comprises a baffle disposed within its interior such that blood flowing into the separator is prevented from flowing out through the vacuum connection.
Claim 11
Dependent Claim
39 words
An apparatus for collecting blood from a patient for reinfusion as defined in claim 8 wherein the air-blood separator further comprises at least one interior wall which gently slopes from the blood supply connection to the blood receptacle connection.
Claim 12
Dependent Claim
31 words
An apparatus for collecting blood from a patient for reinfusion as defined in claim 1 wherein the blood collection receptacle comprises a blood transfer bag having at least three openings therein.
Claim 13
Dependent Claim
23 words
An apparatus for collecting blood from a patient for reinfusion as defined in claim 1 further comprising means for supporting said blood receptacle.
Claim 14
Dependent Claim
34 words
An apparatus for collecting blood from a patient for reinfusion as defined in claim 12 wherein the means for supporting said blood receptacle comprises a stand to which the blood receptacle can be attached.
Claim 15
Dependent Claim
36 words
An apparatus for collecting blood from a patient for reinfusion as defined in claim 5 further comprising a blood filter disposed within said air-blood separator such that blood is filtered before it flows into said receptacle.
Claim 16
Dependent Claim
33 words
An apparatus for collecting blood from a patient for reinfusion as defined in claim 1 wherein the apparatus is comprised of a plastic material so as to be disposable after a single use.
Claim 17
Dependent Claim
38 words
An autologous blood collection apparatus as defined in claim 15 wherein the air-blood separator further comprises a baffle disposed within its interior such that blood flowing into the separator is prevented from flowing out through the vacuum connection.
Claim 18
Dependent Claim
181 words
An autologous blood collection apparatus comprising: an air-blood separator comprising means for defining a chamber having a base, the air-blood separator further comprising a connection capable of being attached to a blood supply, a connection capable of being attached to a source of vacuum, a connection near the base of the separator capable of being placed in communication with a blood collection receptacle; a blood collection receptacle having a blood inlet and a vacuum port, the blood collection receptacle capable of being maintained in a collapsed configuration prior to receipt of collected blood and expanding from a collapsed configuration to an expanded configuration relative to the amount of blood which has flowed into the receptacle, the blood collection receptacle being removable from the apparatus after receipt of the blood; first conduit means for placing the blood collection receptacle in fluid communication with the air-blood separator; second means for placing the blood collection receptacle in fluid communication with a source of vacuum; and means for removably and independently connecting the first conduit means and the second means to the blood collection receptacle.
Claim 19
Dependent Claim
181 words
An autologous blood collection apparatus comprising: an air-blood separator comprising means for defining a chamber having a base, the air-blood separator further comprising a connection capable of being attached to a blood supply, a connection capable of being attached to a source of vacuum, a connection near the base of the separator capable of being placed in communication with a blood collection receptacle; a blood collection receptacle having a blood inlet and a vacuum port, the blood collection receptacle capable of being maintained in a collapsed configuration prior to receipt of collected blood and expanding from a collapsed configuration to an expanded configuration relative to the amount of blood which has flowed into the receptacle, the blood collection receptacle being removable from the apparatus after receipt of the blood; first conduit means for placing the blood collection receptacle in fluid communication with the air-blood separator; second means for placing the blood collection receptacle in fluid communication with a source of vacuum; and means for removably and independently connecting the first conduit means and the second means to the blood collection receptacle.
Claim 20
Dependent Claim
49 words
An autologous blood collection apparatus as defined in claim 17 wherein said first conduit means for placing the blood receptacle in fluid communication with the air-blood separator comprises a feed line connected at one end to the air-blood separator and at the other end to the blood collection receptacle.
Claim 21
Dependent Claim
42 words
An autologous blood collection apparatus as defined in claim 17, further comprising a source of vacuum, said said source of vacuum being placed in communication with the air-blood separator and the blood collection receptacle, such that pressures within the apparatus are equalized.
Claim 22
Dependent Claim
51 words
An autologous blood collection apparatus as defined in claim 19 wherein the means for placing a source of vacuum in communication with the blood collection receptacle comprises a vacuum return line in communication with the receptacle at one end and in communication with the source of vacuum at the other end.
Claim 23
Dependent Claim
34 words
An autologous blood collection apparatus as defined in claim 17 wherein the air-blood separator further comprises at least one interior wall which gently slopes from the blood supply connection to the blood receptacle connection.
Claim 24
Dependent Claim
23 words
An autologous blood collection apparatus as defined in claim 17 wherein the blood collection receptacle comprises a blood transfer bag having flexible sides.
Claim 25
Dependent Claim
31 words
An autologous blood collection apparatus as defined in claim 17 further comprising a blood filter disposed within said air-blood separator such that blood is filtered before it flows into said receptacle.
Claim 26
Independent Claim
241 words
A system for collecting blood from a patient for reinfusion to that patient comprising: an air-blood separator comprising means for defining a chamber having a base and at least one interior wall, the air-blood separator further comprising a connection capable of being attached to a blood supply, a connection capable of being attached to a source of vacuum, a connection near the base of the separator capable of being attached to a feed line, wherein at least one interior wall of the air-blood separator gently slopes from the blood supply connection to the feed line connection; a blood transfer bag which is capable of being maintained in a collapsed configuration prior to receipt of collected blood and capable of expanding substantially only enough to accommodate the amount of blood which has flowed into the blood transfer bag such that further contact between air and blood flowing into the receptacle is avoided; means for removably holding the blood transfer bag stationary; a feed line attached to the feed line connection of the air-blood separator at one end and removably attached to the blood transfer bag at the other end; and a vacuum return line removably attached to the blood transfer bag at one end and being capable of being placed in communication with the source of vacuum at the other end such that any air entering the blood transfer bag can be removed and such that pressures throughout the system are equalized.
Claim 27
Independent Claim
241 words
A system for collecting blood from a patient for reinfusion to that patient comprising: an air-blood separator comprising means for defining a chamber having a base and at least one interior wall, the air-blood separator further comprising a connection capable of being attached to a blood supply, a connection capable of being attached to a source of vacuum, a connection near the base of the separator capable of being attached to a feed line, wherein at least one interior wall of the air-blood separator gently slopes from the blood supply connection to the feed line connection; a blood transfer bag which is capable of being maintained in a collapsed configuration prior to receipt of collected blood and capable of expanding substantially only enough to accommodate the amount of blood which has flowed into the blood transfer bag such that further contact between air and blood flowing into the receptacle is avoided; means for removably holding the blood transfer bag stationary; a feed line attached to the feed line connection of the air-blood separator at one end and removably attached to the blood transfer bag at the other end; and a vacuum return line removably attached to the blood transfer bag at one end and being capable of being placed in communication with the source of vacuum at the other end such that any air entering the blood transfer bag can be removed and such that pressures throughout the system are equalized.
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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) | 1991-10-04 | 1992-04-04 | 1992-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-04 | 1996-04-04 | 1996-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-04 | 2000-04-04 | 2000-10-04 | $7700.00 | Window Closed / Lapsed |