I suspect, as does Jim Wynne, your primary purpose is marketing versus publishing new and breakthrough information bolstered by lots of clinical trials.
One of the trade magazines that I subscribe to is
Medical Product Outsourcing - Devoted to Medical Product & In-Vitro ...
www.mpo-mag.com/
Regulatory agencies and
medical device firms rush to keep pace with the systematic changes made necessary by new technology.
It has a wide readership.
The list Jennifer supplied is comprehensive. In EVERY case, your first contact should be to ask for "author's guidelines." In many cases, journals [versus trade magazines] have VERY complicated guidelines. Your article will not be considered for publication unless it meets the guidelines set forth by the publisher.