Hi Scott
Just stick the tube in your ear, making sure to release some of the pressure as it builds up. You don't want to have too much pressure against the eardrum. I think the risk would be minimal as long as you don't allow too much pressure to build up. the enaly would be putting out somewhere between 1 and 3 litres of ozone/air mixture per minute. Usually auricular insufflations are done at between 1/32 and 1/4 lpm, so the possibility of pressure building up on the eardrum is greater in your case.
have at it!
paul