US D549330 S1
The ornamental design for a surgical instrument, as shown and described.
FIG. 1 is a perspective view of a surgical instrument of our new design;
FIG. 2 is a left perspective view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a right elevational view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a rear elevational view thereof; and,
FIG. 7 is a front elevational view.
The broken lines showing in FIGS. 1–7 are for illustrative purposes only and form no part of the claimed design.