The ornamental design for a medicaldevice, as shown and described.
FIG. 1 is front right perspective view of a medical device showing my new design;
FIG. 2 is front view of the design shown in FIG. 1;
FIG. 3 is a rear view of the design shown in FIG. 1;
FIG. 4 is a right side view of the design shown in FIG. 1;
FIG. 5 is a left side view of the design shown in FIG. 1;
FIG. 6 is a bottom view of the design shown in FIG. 1; and,
FIG. 7 is a top view of the design shown in FIG. 1.
The broken lines shown in the figures are included for the purpose of illustrating portions of the medical device and form no part of the claimed design.