Device and method for monitoring an extracorporeal blood circuit for the detection of air bubbles
US9320843B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2013 |
| Grant date | Apr 26, 2016 |
| Priority date | — |
| Expiry date | Oct 23, 2034 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2230/207
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A device for monitoring an extracorporeal blood circuit of an extracorporeal blood treatment device for detection of air bubbles in blood that is conveyed in the extracorporeal circuit by a blood pump, and a method for monitoring an extracorporeal blood circuit for detection of air bubbles, together with a device for monitoring the extracorporeal blood circuit are described. The device and method are based on monitoring the negative pressure in the extracorporeal blood circuit upstream of the blood pump, to allow differentiation between the occurrence of microbubbles which are attributable to cavitation and an entry of air not due to cavitation. When the negative pressure is above a predetermined limit value and microbubbles are detected in the extracorporeal blood circuit, it is deduced that the microbubbles are produced by cavitation and the mechanisms for dissolving the microbubbles are insufficient to remove the microbubbles again before they could reach the patient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.