Method and apparatus for detecting a blood leak in a hemodialysis system
US4166961A · kind A · utility
45Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 22, 1978 |
| Grant date | Sep 4, 1979 |
| Priority date | — |
| Expiry date | Mar 22, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/38
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A blood leak in the dialyzer is detected by transmitting a pulsed beam of light into the dialysate flowstream at a predetermined angle of incidence between the central axis of the flowstream and the normal axis and measuring variations in reflecting light received by a photodetector arranged on the same side of the flowstream as the phototransmitter at a predetermined angle of reflection. The beam of light is interupted at a rate with a substantially equal on-time to off time ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.