We claim the ornamental design for a surgical cassette for a surgical system, substantially as shown and described.
FIG. 1 is a front elevational view of a surgical cassette showing our new design;
FIG. 2 is a front perspective view thereof;
FIG. 3 is a front perspective view thereof;
FIG. 4 is a back perspective view thereof;
FIG. 5 is a bottom elevational view thereof; and,
FIG. 6 is a top elevational view thereof.
FIGS. 4-6 show features of a surgical cassette with broken lines. These features are for illustrating reference or environmental structure only and do not form any part of the claimed design.