I'm a bit confused Jock, I think what your saying is, shall we reduce the outside pressure surrounding the middle ear, (by placing the patient in a decompression chamber), hence promoting expansion of the air in the middle ear, (Boyles law and all that), to try and expulse gunk out of the eustachian tube.
If you are, then I guess the risk is that we blow the delicate drum, instead of forcing out the gunk.
If your talking about hyperbaric oxygen acting as a bacteriacide, it may well kill the bugs, but we tend to find, in OM, other nasties tent to have a habit of taking over what we've killed.
It may be worth an experiment, if you can get Mac to volunteer, I'll gladly operate the chamber.
(Only kiddin')
Any cheers all, talking of surfin' I'm off to Watergate in the morning. If anyone fancies a beer, I'm the sturdy one with a red bic and a black dog.