Analyte concentration measurement using a hollow frustum
First Claim
1. A method for measuring a concentration of an analyte in a sample of a biological fluid comprising(a) providing a device that comprises a hollow frustum having open ends of unequal size, whose smaller end is substantially closed by a membrane that has(ii) a first outward facing surface for accepting the sample and(ii) a reagent for reacting with the analyte to cause, in a physically detectable parameter of the membrane, measurable change that is related to the concentration of the analyte in the sample;
- (b) applying the sample to the first surface;
(c) measuring the change in the parameter; and
(d) determining the analyte concentration from the measurement of the parameter change.
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Abstract
A method for measuring the concentration of an analyte in a sample of a biological fluid involves a hollow, frustum-shaped disposable device. The smaller end of the frustum has a porous membrane, to which the sample is applied. Preferably, a reagent in the membrane reacts with the analyte to cause a color change. The device is mounted on a meter, which measures the color change and computes from the change the analyte concentration in the sample. Preferably, the devices are released from the meter without touching them, to protect against contamination.
149 Citations
7 Claims
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1. A method for measuring a concentration of an analyte in a sample of a biological fluid comprising
(a) providing a device that comprises a hollow frustum having open ends of unequal size, whose smaller end is substantially closed by a membrane that has (ii) a first outward facing surface for accepting the sample and (ii) a reagent for reacting with the analyte to cause, in a physically detectable parameter of the membrane, measurable change that is related to the concentration of the analyte in the sample; -
(b) applying the sample to the first surface; (c) measuring the change in the parameter; and (d) determining the analyte concentration from the measurement of the parameter change. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification