The ornamental design for a baseplate for a surgical patient positioner, as shown and described.
FIG. 1 is a top perspective view of an base plate of a surgical patient positioner for a medical procedure in accordance with an embodiment of the present invention;
FIG. 2 is a bottom perspective view thereof;
FIG. 3 is a top view thereof;
FIG. 4 is a bottom view thereof;
FIG. 5 is a front view thereof;
FIG. 6 is a back view thereof;
FIG. 7 is a right side view thereof;
FIG. 8 is a left side view thereof; and
FIG. 9 is a bottom perspective view of the base plate for a surgical patient positioner shown in an environment; and,
FIG. 10 is another perspective view of the base plate for a surgical patient positioner shown in another environment.
In the drawings, the broken lines are for the purpose of illustrating environment only and form no part of the claimed design.