Method and system for determining the acceptability of signal data collected from a prothrombin time test strip
US7010432B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 30, 2002 |
| Grant date | Mar 7, 2006 |
| Priority date | — |
| Expiry date | May 2, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/523
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for determining the acceptability of signal data collected from a prothrombin time (PT) test strip includes collecting PT signal data from an assay area and control areas of the PT test strip. Relationships between PT signal data collected from the assay area and PT signal data collected from each of the control areas (e.g., a ratio of post-peak pseudo-slopes) are then ascertained. A determination is subsequently made, based on the relationships, as to whether the PT signal data collected from the assay area is acceptable or not for use in calculating a PT and/or an International Normalization Ratio (INR). This determination can include, for example, comparing the relationships to at least one predetermined threshold limit. A prothrombin time (PT) monitoring system includes a PT test strip and a device. The PT test strip includes an assay area and a control area. The device (e.g., a portable handheld meter) includes an optical measurement means (e.g., an LED/photo-detector pair) for measuring an optical property (e.g., absorption) of the assay area and control areas, an analog-to-digital converter module, a microprocessor module and a memory module. The optical measurement…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.