FIG. 1 is a perspective view of a first embodiment of a medical device;

FIG. 2 is a top plan view thereof, the bottom plan view being identical;

FIG. 3 is a left side plan view thereof, the right side plan view being identical;

FIG. 4 is an alternative perspective view thereof;

FIG. 5 is a perspective view of a second embodiment of a medical device;

FIG. 6 is a top plan view thereof, the bottom plan view being identical;

FIG. 7 is a left side plan view thereof, the right side plan view being identical; and,

FIG. 8 is an alternative perspective view thereof.

The ornamental design which is claimed is shown in solid lines in the drawings. Any broken or phantom lines in the drawings are for illustrative purposes only and form no part of the claimed design.