Apparatus and method for the detection of air in fluid delivery systems
US4981467A · kind A · utility
233Cited by
6References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 27, 1990 |
| Grant date | Jan 1, 1991 |
| Priority date | — |
| Expiry date | Feb 27, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M5/365
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An infusion device includes an infusion pump for delivering a liquid through an infusion conduit from a separate source of the liquid into a patient, a bubble detector for detecting the presence of an air bubble in the infusion conduit, and control circuitry responsive to the bubble detector for determining if the size of the air bubble is unacceptable. The control circuitry is configured to determine if during the time the air bubble is detected it advances a distance indicative of the unacceptable size, one embodiment counting the steps of a linear peristaltic infusion pump for that purpose.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.