Time based interface detection systems for blood processing apparatus
US5316667A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 19, 1993 |
| Grant date | May 31, 1994 |
| Priority date | — |
| Expiry date | Aug 19, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB04B2005/045
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A system for monitoring the interface region between cellular constituents and plasma in a blood separation chamber employs a sensor mechanism for emitting upon the interface region energy that is absorbed by the cellular constituents. The sensor mechanism also detects the intensity of the energy that is not absorbed by the interface region to generate an unabsorbed intensity output signal. The system moves the interface region relative to the sensor mechanism during a prescribed time period. A first circuit measures variations in the unabsorbed intensity output signal over the prescribed time period and generates a time based output. A second circuit can derive the physical size of the interface region based upon the time based output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.