US3848580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for controlled selective separation of undesirable constituents from blood to achieve a therapeutic effect
Assignee: HASSELBLAD
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Filing: 1971-12-10
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Granted: 1974-11-19
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Expires: 1991-12-10
Abstract
Abstract Apparatus for controlled selective separation of undesirable constituents from blood for therapeutic purposes including a device having a plurality of active surfaces for separating predetermined constituents of the blood, a measuring cell having a light source at one end and a light detector at the other end to determine concentration of substances in the blood after filtering, a pressure control device, a sampling device and an alarm system responsive to predetermined value levels of pressure and concentration.
Inventors
- 👤 V Hyden
- 👤 F Hasselblad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:45
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/85; A; A61; A61M; A61M1/00; A61M1/36; A61M1/3607; A61M1/3609; A61M1/3621; A61M1/367; G01N33/00; G01N33/48; G01N33/483; G01N33/487; G01N33/49; G01N33/491; A61M2202/00; A61M2202/04; A61M2202/0413; A61M2202/0429; A61M2202/0433
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
101 words
Therapeutic apparatus for controlled selective separation of constituents of blood flowing from a donor comprising a passage adapted to have blood flow therethrough a device communicating with said passage including a plurality of active surface means positioned to be contacted by the said flowing blood for separating predetermined constituents of the blood, and detection means communicating with the passage and said device for measuring characteristics of the flowing blood and for emitting a signal in response to a predetermined value of each such measured characteristic whereby the occurrence of an abnormality in or completion of said selective separation can be detected.
Claim 2
Dependent Claim
101 words
Therapeutic apparatus for controlled selective separation of constituents of blood flowing from a donor comprising a passage adapted to have blood flow therethrough a device communicating with said passage including a plurality of active surface means positioned to be contacted by the said flowing blood for separating predetermined constituents of the blood, and detection means communicating with the passage and said device for measuring characteristics of the flowing blood and for emitting a signal in response to a predetermined value of each such measured characteristic whereby the occurrence of an abnormality in or completion of said selective separation can be detected.
Claim 3
Dependent Claim
100 words
The therapeutic apparatus as recited in claim 1 wherein said detection means includes conduit means forming a measuring cell and having filter mEans defining a boundary of said cell to separate blood plasma, a light source in said cell and a light detector in said cell responsive to light directed from said light source through the blood to provide an electrical signal corresponding to the concentration of free haemoglobin in the blood and output means for communicating, said electrical signal to an alarm means whereby the occurrence of an abnormality in or completion of said selective separation can be detected.
Claim 4
Dependent Claim
57 words
The therapeutic apparatus as recited in claim 2 wherein said conduit means includes a conduit arranged parallel to said cell, and said filter means includes a first filter disposed at an inlet for said cell from said conduit and a second filter disposed at an outlet from said cell to said conduit downstream from said first filter.
Claim 5
Dependent Claim
37 words
The therapeutic apparatus as recited in claim 3 wherein said conduit means includes a throttling obstruction in said conduit adjacent said second filter to cause blood flow from said inlet to said outlet through said measuring cell.
Claim 6
Dependent Claim
56 words
The therapeutic apparatus as recited in claim 2 wherein said conduit means includes a conduit for through flow of blood past said measuring cell, and said measuring cell includes an inlet communicating with said conduit through said filter means and an outlet for communicating with a pressure lower than the pressure of blood in said conduit.
Claim 7
Dependent Claim
40 words
The therapeutic apparatus as recited in claim 2 wherein said detection means includes alarm means responsive to an electrical signal from said light detector to provide an alarm when the concentration of the free haemoglobin is above a predetermined value.
Claim 8
Dependent Claim
43 words
The therapeutic apparatus as recited in claim 6 wherein said detection means includes pressure sensing means for supplying an electrical signal to said alarm means to provide an alarm when the pressure of blood in said conduit means drops below a predetermined value.
Claim 9
Dependent Claim
35 words
The therapeutic apparatus as recited in claim 7 wherein said detection means includes sampling apparatus including a conduit having a plurality of apertures therein and a plurality of sample cylinders sealably received in said apertures.
Claim 10
Dependent Claim
35 words
The therapeutic apparatus as recited in claim 1 wherein said detection means includes sampling apparatus including a conduit having a plurality of apertures therein and a plurality of sample cylinders sealably received in said apertures.
Claim 11
Dependent Claim
33 words
The therapeutic apparatus as recited in claim 1 wherein said detection means includes pressure sensing means for providing an alarm when the pressure of blood in said passage drops below a predetermined value.
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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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |