Peritoneal dialysis systems and methods employing pneumatic pressure and temperature-corrected liquid volume measurements
US5474683A · kind A · utility
424Cited by
53References
5Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 3, 1993 |
| Grant date | Dec 12, 1995 |
| Priority date | — |
| Expiry date | Mar 3, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/12
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Peritoneal dialysis systems and methods move liquid using a pump chamber that is operated in response to pneumatic pressure variations applied by a pump actuator. The systems and methods periodically measure air pressures in the actuator and an associated reference air chamber and derive from these a measurement of liquid volume moved through the pump chamber. The systems and methods minimize derivation errors by compensating for temperature differences among the pump chamber; the pump actuator; and the reference chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.