US D583941 S1
The ornamental design for a medical instrument, as shown and described.
FIG. 1 is a front isometric view of a medical instrument in accordance with the new design, showing a break indicating a tubular detail of no particular length;
FIG. 2 is an enlarged top plan view thereof;
FIG. 3 is an enlarged bottom plan view thereof;
FIG. 4 is an enlarged right side view thereof;
FIG. 5 is an enlarged left side view thereof;
FIG. 6 is a front view thereof; and,
FIG. 7 is a back view thereof.