The ornamental design for an orthopedicshortlegsplint, as shown and described.
FIG. 1 is a top view of an orthopedic short leg splint showing my new design;
FIG. 2 is a bottom view thereof;
FIG. 3 is a front perspective view thereof;
FIG. 4 is an exploded front perspective view thereof; and,
FIG. 5 is another perspective view thereof shown in a position of use.
The broken lines in the drawings illustrate portions of orthopedic short leg splint and portions of the environment that form no part of the claimed design.