FIG. 1 is a perspective view of a first embodiment of the combination trocar, cannula, and valve showing the design of our invention;

FIG. 2 is a front elevational view of FIG. 1;

FIG. 3 is a top plan view of FIG. 1; and,

FIG. 4 is a bottom plan view of FIG. 1.

The broken lines are for illustrative purposes only and do not form part of the claimed design.