Patent ID: 9572919
Date: 2017-02-21
CPC Classifications: A61M

Claim:
1. A dialysis system comprising: a fresh dialysis fluid pump; a used dialysis fluid pump; and a dialysis fluid cassette including at least one wall that forms a rigid fresh fluid flow path in fluid communication with the fresh dialysis fluid pump and a rigid used fluid flow path in fluid communication with the used dialysis fluid pump, the dialysis fluid cassette carrying a balance chamber, the balance chamber including a first rigid portion, a second rigid portion, and a flexible sheet located between the first and second rigid portions, the flexible sheet dividing the balance chamber into (i) a fresh dialysis fluid compartment connected fluidly to the fresh dialysis fluid pump via the rigid fresh fluid flow path, wherein fresh dialysis fluid contacts the first rigid portion and a first side of the flexible sheet, and (ii) a used dialysis fluid compartment connected fluidly to the used dialysis fluid pump via the rigid used fluid flow path, wherein used dialysis fluid contacts the second rigid portion and a second side of the flexible sheet.