Direct measurement of HDL cholesterol via dry chemistry strips
DCFirst Claim
1. A device for determining HDL cholesterol by obtaining plasma from whole blood and determining HDL level from the plasma which comprises:
- (a) a physical transport medium;
(b) a microporous plasma separation membrane having a first surface against said physical transport medium and having a second surface opposite and away from said physical transport medium;
(c) a filtering membrane having a first surface and a second surface and being capable of filtering LDL and VLDL precipitates from a blood or plasma flow containing these, said filtering membrane having its first surface in contact with said microporous plasma separation membrane;
(d) at least one plasma collecting test membrane in contact with a portion of said second surface of said filtering membrane and having one or more reactants therein capable of reacting with said plasma to display at least one characteristic of HDL cholesterol; and
,(e) LDL and VLDL reactants to form LDL and VLDL precipitates, said reactants being located in one or more of said microporous plasma separation membrane, said filtering membrane and said physical transport medium.
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Abstract
A device for determining HDL cholesterol by obtaining plasma from whole blood and determining the HDL cholesterol level from the plasma. The device includes an inert substrate support or an active substrate support (e.g. one or the other layers), a physical transport medium, a microporous plasma separation membrane connected to the physical transport medium, at least one plasma collecting test membrane, a filtering membrane, LDL and VLDL reactants to form LDL and VLDL precipitates and an optional carrier precipitation membrane. The plasma collecting test membrane has reactants which will react with HDL cholesterol and indicate the HDL cholesterol level quantitatively. The filtering membrane may be located between the microporous plasma separation membrane and the transport medium or between the microporous plasma membrane and the plasma collecting test membrane and its function is to block the precipitated particles from reaching the test zone. The LDL and VLDL reactants which form precipitates of LDL and VLDL may be located anywhere upstream from the plasma collecting test membrane, i.e., within one or more of the transport medium, the microporous plasma separation membrane, the filtering membrane and the optional carrier separation membrane.
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Citations
91 Claims
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1. A device for determining HDL cholesterol by obtaining plasma from whole blood and determining HDL level from the plasma which comprises:
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(a) a physical transport medium; (b) a microporous plasma separation membrane having a first surface against said physical transport medium and having a second surface opposite and away from said physical transport medium; (c) a filtering membrane having a first surface and a second surface and being capable of filtering LDL and VLDL precipitates from a blood or plasma flow containing these, said filtering membrane having its first surface in contact with said microporous plasma separation membrane; (d) at least one plasma collecting test membrane in contact with a portion of said second surface of said filtering membrane and having one or more reactants therein capable of reacting with said plasma to display at least one characteristic of HDL cholesterol; and
,(e) LDL and VLDL reactants to form LDL and VLDL precipitates, said reactants being located in one or more of said microporous plasma separation membrane, said filtering membrane and said physical transport medium. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A device for determining HDL cholesterol by obtaining plasma from whole blood and determining HDL level from the plasma which comprises:
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(a) a physical transport medium; (b) a filtering membrane having a first surface and a second surface and being capable of filtering LDL and VLDL precipitates from a blood or plasma flow containing these, said filtering membrane having its first surface in contact with physical transport medium; (c) a microporous plasma separation membrane having a first surface against the second surface of filtering membrane and having a second surface opposite and away from said second surface of said filtering membrane; (d) at least one plasma collecting test membrane in contact with a portion of said second surface of said microporous plasma separation membrane and having one or more reactants therein capable of reacting with said plasma to display at least one characteristic of HDL cholesterol; and
,(e) LDL and VLDL reactants to form LDL and VLDL precipitants, said reactants being located in one or more of said filtering membrane and said physical transport medium. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59)
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60. A device for determining HDL cholesterol by obtaining plasma from whole blood and determining HDL level from the plasma which comprises:
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(a) a physical transport medium; (b) a microporous plasma separation membrane having a first surface against said physical transport medium and having a second surface opposite and away from said physical transport medium. (c) A carrier precipitant membrane containing reactants for precipitation of LDL and VLDL from plasma having a first surface and a second surface, said first surface in contact with said microporous plasma separation membrane and said second surface opposite and away from said microporous plasma separation membrane; (d) a filtering membrane having a first surface and a second surface and being capable of filtering LDL and VLDL precipitates from a blood or plasma flow containing these, said filtering membrane having its first surface in contact with said carrier precipitant membrane; and
,(e) at least one plasma collecting test membrane in contact with a portion of said second surface of said microporous plasma separation membrane and having one or more reactants therein capable of reacting with said plasma to display at least one characteristic of HDL cholesterol. - View Dependent Claims (61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91)
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Specification