Medical Device Controller

FIG. 1 is a top, front, left side perspective view of a medical device controller according to our new design; FIG. 2 is a front elevation view thereof; FIG. 3 is a rear elevation view thereof; FIG. 4 is a left side elevation view thereof; FIG. 5 is a right side elevation view thereof; FIG. 6 is a top plan view thereof; and, FIG. 7 is a bottom plan view thereof. The dot-dash broken lines represent boundaries of the claimed design and form no part thereof. All other broken lines illustrate portions of the medical device controller that form no part of the claimed design.