초록 ▼

Fluid separation method and apparatus for simultaneously carrying out dialysis and ultrafiltration and exactly controlling the ultrafiltration rate is disclosed. The method and apparatus is concerned with a dialysis system comprising the combination of a fluid separating device; one or more units fo

Fluid separation method and apparatus for simultaneously carrying out dialysis and ultrafiltration and exactly controlling the ultrafiltration rate is disclosed. The method and apparatus is concerned with a dialysis system comprising the combination of a fluid separating device; one or more units for dialysate each unit, each unit comprising a pair of dialysate chambers separated by at least one partition which is movable or transformable while keeping the over-all volume of a pair of dialysate chambers constant; a variable speed dialysate feed pump; a variable speed dialysate discharge pump; and other devices e.g. monitoring devices. Fresh dialysate is fed from one of the dialysate chambers into the dialysate inlet of the fluid separating device; separation treatment is carried out through the semi-permeable membrane of the fluid separating device; waste dialysate is discharged from the dialysate outlet of the fluid separating device into the dialysate chamber and the over-all volume of this closed circuit is maintained constant. The controlled ultrafiltrate is exactly discharged from the closed circuit by an ultrafiltration pump; and a continuous operation is carried out in a plurality of units for exchanging dialysate alternately.

대표청구항 ▼

In a method of performing dialysis by causing fluid flow through a semi-permeable membrane for removal of waste components from a fluid to be treated, wherein fresh dialysate fluid is introduced into contact with said membrane and waste dialysate fluid is removed from contact with said membrane, the

In a method of performing dialysis by causing fluid flow through a semi-permeable membrane for removal of waste components from a fluid to be treated, wherein fresh dialysate fluid is introduced into contact with said membrane and waste dialysate fluid is removed from contact with said membrane, the steps which comprise: (a) causing a predetermined volume of fresh dialysate to flow in a first closed circuit to said membrane and causing an equal volume of waste dialysate to flow from said membrane in said first closed circuit, (b) causing a predetermined volume of fresh dialysate in a separate, second closed circuit to flow to said membrane, and causing an equal volume of waste dialysate to flow from said membrane in said second closed circuit, (c) sequentially operating said first closed circuit and said separate second closed circuit in alternation with each other, and (d) removing a further volume of said waste components after they have flowed through said semi-permeable membrane.