US4243534A
Expired / Lapsed
US
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Blood separation
Assignee: Becton Dickinson and Co
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Filing: 1979-01-25
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Granted: 1981-01-06
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Expires: 1999-01-25
Abstract
Abstract A chromatographic column includes an adsorbant for separating blood components and a lysing agent for hemolyzing the blood whereby a whole blood sample can be applied to the column to effect hemolysis and blood separation in one operation. The invention is particularly employed for analysis of fast running hemoglobin (glycosylated hemoglobin.)
Inventors
- 👤 George F. Bulbenko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:48
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/96; B; B01; B01D; B01D15/00; B01D15/08; B01D15/26; B01D15/36; B01D15/361; B01J; B01J20/00; B01J20/281; B01J39/00; B01J39/04; B01J39/07; B01J39/08; B01J39/16; B01J39/18; B01J39/20; B01J39/22; B01J39/26; C; C07; C07K; C07K1/00; C07K1/14; C07K1/16; C07K14/00; C07K14/795; C07K14/805; G01N33/00; G01N33/48; G01N33/50; G01N33/72; G01N33/721; G01N33/723; G01N33/726; B01D15/10; B01D15/20; B01D15/203; B01J2220/00; B01J2220/50; B01J2220/54; Y; Y10; Y10T; Y10T436/00; Y10T436/10; Y10T436/107497
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
116 words
A chromatographic device for separating blood components, comprising: a chromatographic column, said column including an adsorbing agent for adsorbing blood components which is preconditioned in a buffer to the operating pH for chromatographic separation, a liquid comprising a blood lysing agent which lies above said adsorbing agent in an amount sufficient to hemolyze a whole blood sample which is to be subsequently introduced into the column; and closure means for the column to maintain the liquid and adsorbing agent in the column prior to use thereof, whereby upon use of the column a whole blood sample introduced into the column is hemolyzed in the column by the lysing agent prior to flowing through the adsorbing agent.
Claim 2
Dependent Claim
116 words
A chromatographic device for separating blood components, comprising: a chromatographic column, said column including an adsorbing agent for adsorbing blood components which is preconditioned in a buffer to the operating pH for chromatographic separation, a liquid comprising a blood lysing agent which lies above said adsorbing agent in an amount sufficient to hemolyze a whole blood sample which is to be subsequently introduced into the column; and closure means for the column to maintain the liquid and adsorbing agent in the column prior to use thereof, whereby upon use of the column a whole blood sample introduced into the column is hemolyzed in the column by the lysing agent prior to flowing through the adsorbing agent.
Claim 3
Dependent Claim
21 words
The device of claim 1 wherein the adsorbing agent is preconditioned in a buffer to the operating pH for chromatographic separation.
Claim 4
Dependent Claim
15 words
The device of claim 1 wherein the adsorbing agent is an agent for adsorbing hemoglobin.
Claim 5
Dependent Claim
14 words
The device of claim 3 wherein the absorbing agent is an ion exchange resin.
Claim 6
Dependent Claim
13 words
The device of claim 3 wherein the adsorption agent is a modified cellulose.
Claim 7
Dependent Claim
131 words
A chromatographic device for separation of glycosylated hemoglobin from the main hemoglobin component, comprising: a chromatographic column said column including an adsorbing agent for adsorbing hemoglobin, said adsorbing agent being equilibrated to an operating pH for separating glycosylated hemoglobin from the main hemoglobin component, said pH being from 5.0 to 10.0, a liquid above the adsorbing agent comprising a blood lysing agent in an amount sufficient to hemolyze a whole blood sample which is to be subsequently introduced into the column, and closure means for the column to maintain the liquid and adsorbing agent in the column prior to use thereof, whereby upon use of the column a whole blood sample introduced into the column is hemolyzed in the column by the lysing agent prior to flowing through the adsorbing agent.
Claim 8
Dependent Claim
131 words
A chromatographic device for separation of glycosylated hemoglobin from the main hemoglobin component, comprising: a chromatographic column said column including an adsorbing agent for adsorbing hemoglobin, said adsorbing agent being equilibrated to an operating pH for separating glycosylated hemoglobin from the main hemoglobin component, said pH being from 5.0 to 10.0, a liquid above the adsorbing agent comprising a blood lysing agent in an amount sufficient to hemolyze a whole blood sample which is to be subsequently introduced into the column, and closure means for the column to maintain the liquid and adsorbing agent in the column prior to use thereof, whereby upon use of the column a whole blood sample introduced into the column is hemolyzed in the column by the lysing agent prior to flowing through the adsorbing agent.
Claim 9
Dependent Claim
14 words
The device of claim 6 wherein the adsorbing agent is an ion exchange resin.
Claim 10
Dependent Claim
13 words
The device of claim 6 wherein the adsorbing agent is a modified cellulose.
Claim 11
Dependent Claim
15 words
The device of claim 6 wherein the lysing agent is a surfactant dissolved in water.
Claim 12
Dependent Claim
11 words
The device of claim 6 wherein the lysing agent is saponin.
Claim 13
Dependent Claim
15 words
The device of claim 6 wherein the lysing agent is buffered to the operating pH.
Claim 14
Dependent Claim
13 words
The device of claim 11 wherein the pH is from 6.0 to 8.0.
Claim 15
Dependent Claim
24 words
The device of claim 12 wherein the adsorbing agent is weakly acidic polymethacrylate resin crosslinked with divinyl benzene equilibrated to a pH of 6.8.
Claim 16
Dependent Claim
15 words
The device of claim 13 wherein the lysing agent is a surfactant dissolved in water.
Claim 17
Dependent Claim
161 words
A process for determining the amount of glycosylated hemoglobins in a blood sample, comprising: introducing a whole blood sample into a chromatographic column, including an adsorbing agent for adsorbing hemoglobin and a liquid comprising a blood lysing agent which lies above said adsorbing agent in an amount sufficient to hemolyze a whole blood sample, said liquid comprising the blood lysing agent being present above said adsorbing agent prior to introduction of the whole blood sample into the column, said adsorbing agent and said liquid comprising the blood lysing agent being buffered to an operating pH for separating glycosylated hemoglobin, prior to introduction of the whole blood sample, said pH being from 5.0 to 10.0; hemolyzing the whole blood sample in the column with the lysing agent to produce a hemolysate; passing the hemolysate into the adsorbing agent to adsorb hemoglobin; eluting glycosylated hemoglobins from the adsorbing agent to produce an eluate; and determining the amount of glycosylated hemoglobins in the eluate.
Claim 18
Dependent Claim
161 words
A process for determining the amount of glycosylated hemoglobins in a blood sample, comprising: introducing a whole blood sample into a chromatographic column, including an adsorbing agent for adsorbing hemoglobin and a liquid comprising a blood lysing agent which lies above said adsorbing agent in an amount sufficient to hemolyze a whole blood sample, said liquid comprising the blood lysing agent being present above said adsorbing agent prior to introduction of the whole blood sample into the column, said adsorbing agent and said liquid comprising the blood lysing agent being buffered to an operating pH for separating glycosylated hemoglobin, prior to introduction of the whole blood sample, said pH being from 5.0 to 10.0; hemolyzing the whole blood sample in the column with the lysing agent to produce a hemolysate; passing the hemolysate into the adsorbing agent to adsorb hemoglobin; eluting glycosylated hemoglobins from the adsorbing agent to produce an eluate; and determining the amount of glycosylated hemoglobins in the eluate.
Claim 19
Dependent Claim
42 words
The process of claim 15 wherein said adsorbing agent and said liquid comprising the blood lysing agent are buffered to an operating pH for separating glycosylated hemoglobin, prior to introduction of the whole blood sample, said pH being from 5.0 to 10.0.
Claim 20
Dependent Claim
12 words
The process of claim 15 wherein the lysing agent is a surfactant.
Claim 21
Dependent Claim
11 words
The process of claim 15 wherein the lysing agent is saponin.
Claim 22
Dependent Claim
24 words
The process of claim 15 wherein the adsorbing agent is weakly acidic polymethacrylate resin crosslinked with divinyl benzene equilibrated to a pH of 6.8.
Claim 23
Dependent Claim
12 words
The process of claim 19 wherein the lysing agent is a surfactant.
Claim 24
Dependent Claim
22 words
The process of claim 15 wherein the determined glycosylated hemoglobins are expressed as a percent of total hemoglobin in the blood sample.
References Cited (Backward Citations)
US4142858A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-06 | 1984-07-07 | 1985-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-06 | 1988-07-07 | 1989-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-06 | 1992-07-07 | 1993-01-06 | $7700.00 | Window Closed / Lapsed |