ASSAY DEVICE AND METHOD OF ASSAYING
First Claim
1. An assay device for enabling a test to be performed on an analyte, the device having an application zone for application of a quantity of the analyte, a waste zone, and a pathway for allowing passage of the analyte from the application zone to the waste zone, the device including a quantity of a label material which will emit or modify light at least when activated and which will bind to the analyte, the pathway also including a capture zone located between the application zone and the waste zone that has a quantity of capture material which is bound to the pathway and which will bind to analyte that passes along the pathway so that the analyte will be bound to the pathway, the device having a first optical filter on a side thereof for allowing transmission of light emitted or modified by the label material and for blocking light of at least one other wavelength range in order to enable the device to be illuminated from one side thereof and for light emitted or modified by the label material located in the pathway to be detected from the opposite side thereof.
1 Assignment
0 Petitions
Accused Products
Abstract
A device for testing an analyte comprises a pathway allowing passage of analyte from an application zone to a waste zone. The device includes label material that emits or modifies light and which binds to the analyte. Between the application and waste zones there is a capture zone having capture material for binding any analyte traversing the pathway to the pathway. A first optical filter on one surface of the device allows transmission of light emitted or modified by the label and blocks light of at least one other wavelength range. This enables the device to be illuminated from one surface and light emitted or modified by the label to be detected from the opposite surface. The device may include a second filter allowing shorter wavelength light to reach the label. The device may be viewed using an illuminating reader or held up to a light source for viewing.
21 Citations
30 Claims
- 1. An assay device for enabling a test to be performed on an analyte, the device having an application zone for application of a quantity of the analyte, a waste zone, and a pathway for allowing passage of the analyte from the application zone to the waste zone, the device including a quantity of a label material which will emit or modify light at least when activated and which will bind to the analyte, the pathway also including a capture zone located between the application zone and the waste zone that has a quantity of capture material which is bound to the pathway and which will bind to analyte that passes along the pathway so that the analyte will be bound to the pathway, the device having a first optical filter on a side thereof for allowing transmission of light emitted or modified by the label material and for blocking light of at least one other wavelength range in order to enable the device to be illuminated from one side thereof and for light emitted or modified by the label material located in the pathway to be detected from the opposite side thereof.
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21. A method of performing a test on an analyte, by means of an assay device having an application zone for application of the analyte, a waste zone, and a pathway for allowing passage of the analyte from the application zone to the waste zone, the pathway also including a capture zone located between the application zone and the waste zone that has a quantity of capture material which is bound to the pathway and which will bind to any analyte, which method comprises:
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applying a quantity of the analyte to the application zone and allowing the analyte to pass along the pathway to and beyond a capture zone where the pathway includes a quantity of capture material which will bind the analyte to the pathway, causing the analyte to contact a quantity of a label material (either before or after it has reached the capture zone) which will emit or modify light at least when activated and which will bind to the analyte so that the analyte and label material will be bound to the pathway at the capture zone; applying a quantity of a wash to the application zone in order to cause excess analyte and label material to flow along the pathway to the waste zone; and illuminating one side of the assay device and detecting light that is emitted or modified by the label material from the opposite side of the device, the said opposite side of the device including an optical filter for allowing transmission of light emitted or modified by the label material and for blocking light of at least one other wavelength so that detection of the light will indicate the presence or quantity of the analyte. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification