The ornamental design for a medical displaystand, as shown and described.
FIG. 1 is an upper perspective view of a medical display stand in accordance with the present design;
FIG. 2 is a lower perspective view of the medical display stand shown in FIG. 1;
FIG. 3 is a front view of the medical display stand shown in FIG. 1;
FIG. 4 is a rear view of the medical display stand shown in FIG. 1;
FIG. 5 is a plan view of the medical display stand shown in FIG. 1;
FIG. 6 is a bottom view of the medical display stand shown in FIG. 1;
FIG. 7 is a left side view of the medical display stand shown in FIG. 1; and,
FIG. 8 is a right side view of the medical display stand shown in FIG. 1.
The broken away symbols in the drawings indicate that any portion of the medical display stand beyond what is shown forms no part of the claimed design.