The ornamental design for a disposablecartridge for a dialysis machine, as shown and described.
FIG. 1.1 is a perspective view of a disposable cartridge for a dialysis machine showing my new design;
FIG. 1.2 is a side elevation view thereof;
FIG. 1.3 is a bottom plan view thereof; and
FIG. 1.4 is a top plan view thereof.
The broken line showing of the disposable cartridge for a dialysis machine is for the purpose of illustrating portions of the disposable cartridge for a dialysis machine and forms no part of the claimed design.