FIG. 1 is a perspective view of a medical puncturing device showing our new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a rear end view thereof;

FIG. 4 is a front end view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a perspective view thereof.

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