Occlusion detection method
US9101712B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2012 |
| Grant date | Aug 11, 2015 |
| Priority date | — |
| Expiry date | Dec 12, 2033 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/12
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Methods for improving the accuracy of occlusion sensor baselines in an infusion pump are described. An infusion pump includes logic for making an antiratchet decision for determining whether a new administration set was installed after there has been access to the administration set. If so, then new occlusion sensor baselines are established. If not, then the current baselines are maintained. The antiratchet decision logic may depend upon the value of a baseline delta equal to a difference between the upstream sensor signal and the downstream sensor signal. In another aspect, an upstream occlusion sensor baseline is shifted in correspondence with decreases in the upstream sensor signal occurring while a pumping mechanism of the infusion pump is not operating to compensate for sensor signal drift.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.