Method and apparatus for determining hematocrit
US4068169A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 1976 |
| Grant date | Jan 10, 1978 |
| Priority date | — |
| Expiry date | Sep 21, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/49
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus and method are provided for measuring hematocrit. A diluted blood sample is passed through a well-known conductivity sensor providing a sensor pulse for each sensed blood cell. Each pulse has a peak amplitude corresponding to the size of a blood cell passing through the sensor. During a first time period initiated by passing of the sensor pulse above a threshold level, the sensor pulse is coupled to peak detecting means, and a signal indicative of the level of the peak is generated and stored. The value of each stored signal is added to an integrator for a fixed period of time. The value stored by the integrator is thus indicative of hematocrit level for a known sample volume.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.