US D615196 S1
The ornamental design for a medical instrument, as shown and described.
FIG. 1 is a top isometric view of a medical instrument in accordance with the new design being shown broken away to indicate an indeterminate length;
FIG. 2 is a right side view thereof;
FIG. 3 is a left side view thereof;
FIG. 4 is a bottom view thereof;
FIG. 5 is a top view thereof;
FIG. 6 is a rear view thereof; and,
FIG. 7 is a front view thereof.