caisson disease (DCS) has had neumerous studies completed and several with respect to your question about non treatment..
Many misconceptions surrounding this disease are the mistaken asymptamatic treatments being provided by family health care providers based on the individual pts complaint and them not revealing to health care providers they have been diving in the last 72 - 96 hours.
There are very few people who actualy require a table 6 deco chamber ride (285hrs).
Daryl Heisman has authored several books and published several papers on these issues as well as reemerssion therapy for SUSPECTED DCS.