FIG. 1 is a perspective view of a medical instrument in accordance with the new design; FIG. 2 is a side view of the medical instrument of FIG. 1; FIG. 3 is a top view of the medical instrument of FIG. 1; FIG. 4 is a bottom view of the medical instrument of FIG. 1; FIG. 5 is a front elevational view of the medical instrument of FIG. 1; and, FIG. 6 is a rear view of the medical instrument of FIG. 1.