The ornamental design for a medicalnavigationinstrument, as shown and described.
FIG. 1 is a front perspective view of a medical navigation instrument according to the present invention.
FIG. 2 is a left side view of the medical navigation instrument of FIG. 1.
FIG. 3 is a right side view of the medical navigation instrument of FIG. 1.
FIG. 4 is a top view of the medical navigation instrument of FIG. 1.
FIG. 5 is a bottom view of the medical navigation instrument of FIG. 1.
FIG. 6 is a rear view of the medical navigation instrument of FIG. 1; and,
FIG. 7 is a front view of the medical navigation instrument of FIG. 1.
The dashed lines illustrate environment that does not form a part of the present invention, and no claim is made to the material illustrated with dashed lines.
The catheter of the medical navigation instrument is shown with a symbolic break in its length. The appearance of any portion of the article between the break lines forms no part of the claimed design.