RESEARCH TRIANGLE PARK, N.C., July 11 /PRNewswire/ -- The most effective promotional channel for medical devices is physician/specialist conferences, as noted in a report by Cutting Edge Information. On a relative effectiveness scale ranging from 1 to 5, with 5 being the most effective, medical device companies rated physician/specialist conferences an average 4.2, citing it just above medical education, opinion leader influence, and sales rep calls.