The ornamental design for a electrode for a medicaldevice, as shown and described.
FIG. 1 is a top view of an electrode for a medical device, in accordance with the present invention.
FIG. 2 is a bottom view thereof.
FIG. 3 is a side view thereof.
FIG. 4 is a top perspective view thereof; and,
FIG. 5 is a bottom perspective view thereof.
The ornamental design is an electrode for a medical device, such as but not limited to, a vital sign monitor, a Holter monitor, an EKG/ECG, a stress test ECG.