The ornamental design for a wristrest for pulsewave measuring instrument, as shown and described.
FIG. 1 is a perspective view of a wrist rest for pulse wave measuring instrument showing our new design;
FIG. 2 is a front elevational view thereof; the rear elevational view being a mirror image of the front elevational view and therefore not illustrated;
FIG. 3 is a top plan view thereof;
FIG. 4 is a right side elevational view thereof; and,
FIG. 5 is a left side elevational view thereof.
The broken lines are shown in the views for illustrative purposes only, and form no part of the claimed invention.