Method and device for monitoring a blood treatment unit of an extracorporeal blood treatment device
US8574183B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 29, 2008 |
| Grant date | Nov 5, 2013 |
| Priority date | — |
| Expiry date | Apr 17, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/707
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention relates to a method and a device for monitoring a blood treatment unit, subdivided by a semipermeable membrane into a blood chamber and a dialysis liquid chamber, of an extra-corporeal blood treatment device, which comprises an extra-corporeal blood circuit having an arterial branch leading to the blood chamber of the blood treatment unit, a venous branch, which extends away from the blood chamber, and a dialysis fluid system, in which the dialysis liquid chamber is arranged. The method according to the present invention and the device according to the present invention are based on the idea that the change of the flow resistance of the dialysis machine is determined based on two measurements, wherein an oscillating pressure signal in the extra-corporeal blood circuit or in the dialysis fluid system is measured before and after the change of the substitution rate and/or ultrafiltration rate, with which the substitute is applied to, or ultrafiltrate is removed from, the blood flowing in the blood circulation system. Preferably, the supply of substitute is interrupted temporarily.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.