Ambulatory ultrafiltration device with control unit programmed to control a drive fluid pump to perform ultrafiltration
US9636445B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 2011 |
| Grant date | May 2, 2017 |
| Priority date | — |
| Expiry date | Aug 24, 2033 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2209/088
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An ambulatory ultrafiltration device includes a blood filter that has a blood side or fluid communication with the vascular system of the subject, an ultrafiltrate side, and a semipermeable membrane disposed between the blood side and the ultrafiltrate side. The ambulatory ultrafiltration also includes a buffer vessel in fluid communication with the blood side of the blood filter, and a blood pump. The blood pump is controlled to alternate between a withdrawal phase and a return phase. In the withdrawal phase, blood is withdrawn on a blood path from the subject via the blood filter to the buffer vessel. In the return phase, blood is returned from the buffer vessel to the subject on the blood path. The blood filter is arranged to remove ultrafiltrate from the blood during at least one of the withdrawal and return phases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.