There are nearly one and a half million registered medical devices on the market in Australia.

Now, you would think that life-saving treatments such as pacemakers, defibrillators and pain pumps would be subject to the same sorts of clinical trials as prescription drugs. Right?

Today, investigative reporter Liam Mannix on which devices have attracted the most complaints, and the medical device under investigation by a coroner after a tragic case in a regional town in Victoria.