Patent ID: 8142653

Claim:
A set of medical fluid cassettes, comprising: a first medical fluid cassette forming a plurality of fluid channels and pump chambers, the first medical fluid cassette being configured to be disposed within a cassette compartment of a medical treatment machine and used with the medical treatment machine to provide a first type of medical treatment, the medical treatment machine comprising a plurality of piston pumps that align with the plurality of pump chambers of the first medical fluid cassette when the first medical fluid cassette is disposed within the cassette compartment; a second medical fluid cassette forming a plurality of fluid channels and pump chambers, the second medical fluid cassette being configured to be disposed within the cassette compartment of the medical treatment machine and used with the medical treatment machine to provide a second type of medical treatment, wherein at least one of the plurality of piston pumps of the medical treatment machine aligns with at least one of the plurality of pump chambers of the second medical fluid cassette and at least one of the plurality of piston pumps of the medical treatment machine aligns with a portion of the second medical fluid cassette that does not comprise a pump chamber when the second medical fluid cassette is disposed within the cassette compartment, wherein the configuration of the plurality of fluid channels and chambers of the first medical fluid cassette is different than the configuration of the plurality of fluid channels and chambers of the second medical fluid cassette, and the first type of medical treatment is different than the second type of medical treatment.