Pump monitor for photoactivation patient treatment system
US4623328A · kind A · utility
90Cited by
5References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 29, 1984 |
| Grant date | Nov 18, 1986 |
| Priority date | — |
| Expiry date | Oct 29, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2071/006
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A preferred patient blood treatment system for the photoactivation of reagents in contact with a patient's blood employs an infusion pump for adding anti-coagulation reagent to the blood during extracorporeal operations. The infusion pump is preferably driven by a stepper motor and monitored by a periodic photo chopper employing a plurality of sensors. The spacing of the sensors and the spacing of the photo choppers work in concert to detect rotation of the stepper motor and to discriminate such from stutter or other characteristic nonrotational faults associated with stepper motors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.