Ultrafiltration rate adapter

Details Ultrafiltration rate adapter Ultrafiltration rate adapter

A - Human Necessities

61

M

182/15.2

A61M 1/16 (2006.01)

Patent

CA 1142449

ULTRAFILTRATION RATE ADAPTER Marshall G. Haydon ABSTRACT OF THE DISCLOSURE There is disclosed herein a dialysis machine adapted for use with a dialyzer which includes means for establishing and controlling a desired ultrafiltration rate. The machine includes a flow system for drawing fresh dialysis solution under a negative pressure from a source through the dialyzer. Valve means are provided for terminating flow to and from the dialyzer. An ultrafiltration branch is also provided which is connected to the flow system between said valve means and said dialyzer for drawing liquid from the dialyzer when flow to and from the dialyzer has been terminated. The ultrafiltration branch in- cludes single-acting piston-pump means for drawing liquid from the flow system and a stepper motor connected to the pump means for drawing the liquid in accurately controlled amounts and at accurately controlled rates.

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