Method for quantitative analysis of body fluid constituents
US5087556A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 17, 1989 |
| Grant date | Feb 11, 1992 |
| Priority date | — |
| Expiry date | May 17, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S436/807
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention is a self-contained, chromatic quantitative analyzer that quantitatively detects an analyte in a biological fluid. The invention includes a base having a first open reservoir for receiving the biological fluid. A means for separating solids from the biological fluid is provided in the first open reservoir. A channel is provided which draws, by capillary and/or wicking action, the biological fluid from the first open reservoir to a second open reservoir. The second open reservoir draws the biological fluid from the channel and, when the second open reservoir is full with the biological fluid, the capillary and/or wicking action terminates. A membrane is provided in the channel which is permeable to the biological fluid. There is at least one chromatic chemical indicator immobilized in the membrane in a predetermined concentration. The membrane enables the biological fluid to interact with the chromatic chemical indicator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.