Extracorporeal blood processing methods and apparatus
US6899691B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2000 |
| Grant date | May 31, 2005 |
| Priority date | — |
| Expiry date | Jan 20, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/3331
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method and apparatus for controlling a fluid separation system in response to fluid pressure changes in a fluid flow, said method comprising the steps of sensing a fluid pressure; comparing the fluid pressure to a threshold value, and if the fluid pressure is below the threshold value, then pausing fluid flow for a selected period. During the selected period, either the fluid pressure sensed automatically resolves or the method further comprises a step of setting a fall alarm condition. The method and apparatus may further include interpreting a particular quantity of below threshold fluid pressure occurrences where the fluid pressure is below the threshold value occurring within a particular time period, and then, signalling an alarm. Threshold values may be calculated by the method or apparatus according to a formula such as the following:Threshold Value=Config+75−0.3309*Qin/(1−Hin)−0.3026*Qn/(1−Hn);
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.