Blood cell discriminator and counter utilizing transmitted and scattered light
US4586190A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 14, 1983 |
| Grant date | Apr 29, 1986 |
| Priority date | — |
| Expiry date | Nov 14, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2015/012
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A blood counter comprising a sheathed flow cell; a light source including what has the wavelengths causing absorption of light by hemoglobin in the blood; means for receiving transmitted light; means for receiving the scattered light; a decision assembly for judging, based on the output signals detected by means for receiving the transmitted light and scattered light, (i) the flowing cells therein to be a red blood cell if the degree of absorption is larger than the preselected level and (ii) the other to be a blood platelet if the intensity of the scattered light is larger than a certain level and if the degree of absorption is smaller than said preselected level; and a counter assembly for counting out the red blood cells and blood platelets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.