narcosis and gas density to tolerable levels for the planned depth. Trimix is often used in technical diving, and is also sometimes used in professional diving. In 2015, the United States Navy Experimental Diving Unit showed that decompression from bounce dives using trimix is not more efficient than dives on heliox. See also References Further reading External links Breathing gases Asthma Helium Medical treatments Respiratory therapy ro:Heliox