Finding the "killer app" for treating obese individuals has seen no shortage of efforts result in failure over the years. The slow start of VIVUS' (VVUS) Qsymia has investors doubting the market potential of both it and Arena Pharmaceuticals(ARNA) new drugs targeting the problem. In the following video, health care bureau chief Brenton Flynn runs through yet another example of a novel obesity  treatment approach that seems destined for failure from EnteroMedics (NASDAQ: ETRM).