We claim the ornamental design for a medical ventilation needle, as shown and described.
FIG. 1 is a top perspective view of a medical ventilation needle of the present invention;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a first side view thereof;
FIG. 5 is a second side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof;
FIG. 8 is a cross sectional view thereof at 8-8 in FIG. 5; and,
FIG. 9 is a reference view thereof shown in an environmental use.
The dash dot lines immediately adjacent to the claimed areas in the views represent the boundaries of the claimed design. The dashed lines showing the medical ventilation needle illustrate the portions of the design that form no part of the claimed design. None of the broken lines form any part of the claimed design.