Single-needle artificial kidney
US4599165A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 14, 1985 |
| Grant date | Jul 8, 1986 |
| Priority date | — |
| Expiry date | Jan 14, 2005 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2230/06
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A single-needle artificial kidney comprising a haemodialyser divided by a semi-permeable membrane into first and second compartments, one of which forms part of an extracorporeal blood circuit including a blood circulation pump and a single needle for inserting into the patient and a dialysis liquid circuit including the second chamber and a dialysis liquid pump. The dialysis liquid circuit is provided with means for periodically modulating the flow rate of the dialysis liquid in the haemodialyser between minimum and maximum values, the flow rate of the dialysis liquid being produced by a sensing pulsations of the blood at frequencies less than one hertz and using these pulsations via a servo-control to effect changes in the dialysis liquid flow rate so that it reaches maximum and minimum values simultaneously with maximum and minimum of the blood flow rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.