Method for calibrating a pump segment used in a peristaltic pump and a medical machine adapted for carrying out the method
US5733257A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 22, 1996 |
| Grant date | Mar 31, 1998 |
| Priority date | — |
| Expiry date | Feb 22, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/70
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method and medical machine for calibrating a peristaltic pump (36, 39) intended to be used in connection with the medical machine, such as a dialysis machine. The machine comprises an internal fluid flow meter (18, 19). Fluid is introduced into the pump segment (36) and is pumped by the peristaltic pump at a substantially constant rotation rate. Three different inlet pressures are obtained and measured by a pressure meter (16) and the corresponding fluid flow is measured by the internal fluid flow meter (18, 19) for obtaining calibration pair values. A calibration curve is calculated from said pair values by a computer (23) inside the medical machine. The actual fluid flow rate is determined by said computer (23) from said calibration curve based on the actual inlet pressure and the actual revolution rate of the propelling means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.