The ornamental design for an electrosurgicaldevice, as shown and described.
FIG. 1 is a perspective view of the electrosurgical device, showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The broken lines shown in the figures represent portions of the electrosurgical device that form no part of the claimed design. The design shown is not to be limited to any particular size and may be scaled larger or smaller.