The ornamental design for a medicalvalve, as shown and described.
FIG. 1 is a perspective view of an embodiment of a medical valve in accordance with the present invention;
FIG. 2 is a front view of the medical valve of FIG. 1;
FIG. 3 is a rear view of the medical valve of FIG. 1;
FIG. 4 is a right side view of the medical valve of FIG. 1;
FIG. 5 is a left side view of the medical valve of FIG. 1;
FIG. 6 is a top view of the medical valve of FIG. 1; and,
FIG. 7 is a bottom view of the medical valve of FIG. 1.
The broken lines in the drawing views are included for the purpose of illustrating portions of the medical valve that form no part of the claimed design.