Adhered membranes retaining porosity and biological activity
First Claim
1. An assay device for measuring serum cholesterol associated with high-density lipoproteins (HDL) in a blood fluid sample containing lipoproteins other than HDLs of the type including a sample distribution array effective to distribute a blood fluid sample from a sample application region to one or more sample collection regions, the device comprising:
- a HDL test pad in which HDL concentration can be assayed being spaced apart from said array, said HDL test pad being affixed to a mounting means; and
a reagent pad containing a binding reagent effective to selectively bind and remove non-HDLs from the fluid sample;
wherein said HDL test pad and said reagent pad are joined by a bond selected from the group consisting of a heat formed bond and heat activated adhesive bond;
wherein said mounting means are effective (i) to maintain the device in a sample-distribution position, wherein said joined HDL test pad and reagent pad are spaced apart from said array, and (ii) to transfer said device to a test position, whereby the joined HDL test pad and reagent pad are in contact with said array.
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Abstract
An assay pad for measuring the concentration of HDL-associated cholesterol in a sample, a method for using the pad, and a diagnostic assay device for carrying out the method are described. The assay pad includes a polymer adhesive or heat laminate bond. The assay design prevents interference by reagents used for such removal with the HDL quantification reaction or with other assays carried out on the same sample. If desired, removal of non-HDL lipoproteins and assay of HDL cholesterol can be carried out without interruption of the assay.
42 Citations
37 Claims
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1. An assay device for measuring serum cholesterol associated with high-density lipoproteins (HDL) in a blood fluid sample containing lipoproteins other than HDLs of the type including a sample distribution array effective to distribute a blood fluid sample from a sample application region to one or more sample collection regions, the device comprising:
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a HDL test pad in which HDL concentration can be assayed being spaced apart from said array, said HDL test pad being affixed to a mounting means; and a reagent pad containing a binding reagent effective to selectively bind and remove non-HDLs from the fluid sample; wherein said HDL test pad and said reagent pad are joined by a bond selected from the group consisting of a heat formed bond and heat activated adhesive bond; wherein said mounting means are effective (i) to maintain the device in a sample-distribution position, wherein said joined HDL test pad and reagent pad are spaced apart from said array, and (ii) to transfer said device to a test position, whereby the joined HDL test pad and reagent pad are in contact with said array. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of preparing a device suitable for measuring serum cholesterol comprising:
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providing a reagent pad and an HDL test pad, wherein at least the reagent pad is formed of an asymmetric polysulfone membrane having a small pore side and an open pore side; heating to adhere said HDL test pad and said reagent pad; and applying (i) HDL test reagents to said HDL test pad, and (ii) a reagent effective to selectively bind and remove non-HDLs from a fluid sample to said reagent pad to form said device. - View Dependent Claims (17, 18, 19, 20)
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21. A method of preparing a device suitable for measuring serum cholesterol comprising:
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coating a reagent pad with heat activated adhesive; applying (i) HDL test reagents to an HDL test pad, and (ii) a reagent effective to selectively bind and remove non-HDLs from a fluid sample to said reagent pad; heating to adhere said HDL test pad and said reagent pad to form said device. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
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30. A method of measuring serum cholesterol associated with high-density lipoproteins (HDL) in a blood fluid sample containing lipoproteins other than HDLs, comprising:
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contacting the sample with a sample reservoir through which the sample is distributed to one or more sample collection sites; bringing into contact with such a sample collection site a laminate comprising (i) a reagent pad containing a reagent effective to selectively bind and remove non-HDLs from the fluid sample, and (ii) an HDL test pad having a detectable indicator of HDL cholesterol; wherein said blood fluid sample passes through said laminate by capillary action and/or gravity through said laminate to permit measurement of HDL concentration; and measuring the level of HDL cholesterol in said sample by detection at said HDL test pad. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37)
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Specification