Artificial kidney with automatic regulation of the pressure of the dialyslate as a function of withdrawal of ultrafiltrate
US4767526A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 21, 1985 |
| Grant date | Aug 30, 1988 |
| Priority date | — |
| Expiry date | Feb 21, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/929
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Artificial kidney comprises a hemodialyzer connected in a dialysis liquid circuit which is in the form of a loop the volume of which is essentially invariable. The circuit is open to the atmosphere and comprises a circulating pump arranged upstream of the hemodialyzer. Means are provided for drawing off and measuring, outside the said circuit, amounts of liquid equal to the amounts of ultrafiltrate which it is desired to remove from a patient's blood stream. A variable hydraulic resistance is provided downstream of the hemodialyzer and comprises a float, the resistance being operative to keep the dialysis liquid at an essentially constant level in the circuit in order automatically to regulate the pressure of the dialysis liquid in the hemodialyzer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.