Single-needle artificial kidney

Details Single-needle artificial kidney Single-needle artificial kidney

1985-01-14

1986-07-08

Sever, Frank

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210 97, 2103213, A61M 500, A61M 700, B01D 1300

Patent

active

045991650

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.

REFERENCES:
patent: 3830234 (1974-08-01), Kopp
patent: 3902490 (1975-09-01), Jacobsen et al.
patent: 4096859 (1978-06-01), Agarwal et al.

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