If you want to learn more about selling medical devices through direct response I suggest taking advantage of this free subscription to DM News, here's the link:
http://www.dmnews.com/
You should sign up for the daily email; I also suggest that you start studying every great solicitation you get in every medium of delivery. Start saving all the direct mail that turns you on and also DVR five hours of TV at night on stations like Bravo, TLC, and SyFy (where infomercials run). You'll be surprised what you will learn if you pay attention and start story boarding great infomercials. By Brad Richdale
Direct Marketing Medical Devices by "Brad Richdale" ®
