Treatment fluid devices methods and systems

A consumable medical device, comprising:

• a rigid cartridge shell to which a film is adhered to form a cartridge with fluid channels defined between portions of the rigid cartridge shell and the film such that fluid flowing through the fluid channels is in contact with the film and the portions of the rigid cartridge shell, the fluid channels including a damper chamber that is configured to expand and contract in volume to thereby compensate for pressure fluctuations within the fluid channels;
• a first portion of the film overlying and partially defining the damper chamber and the fluid channels;
• and
• the cartridge having a first side and an opposed second side and multiple parallel pumping tube segments spanning across holes in the rigid cartridge shell to permit access by pumping actuators, each of the multiple parallel pumping tube segments leading to a flexible tube that extends out of the cartridge, wherein
• all of the flexible tubes that extend away from the cartridge extend only on the first side of the cartridge to permit the cartridge to fit through a slot opening sized for the cartridge with the second side inserted into the slot before the first side and the flexible tubes extending out of the first side without any extra clearance for the flexible tubes.