Apparatus and method for using ultrasound to determine hematocrit
US4854170A · kind A · utility
66Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 12, 1988 |
| Grant date | Aug 8, 1989 |
| Priority date | — |
| Expiry date | Oct 12, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/491
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
This invention is an ultrasound apparatus for determining hematocrit. A sample of blood in a microhematocrit capillary tube is acoustically coupled to an ultrasound transducer which creates a standing wave in the blood sample. Red blood cells in the blood sample are packed in bands that correspond to the nodes of the standing wave. The thickness of the bands as a function of the thickness of the remaining plasma is an indication of the hematocrit of the blood sample.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.