Originally Posted by
Hacker15e
Again, physiologically, how is that any different than a valsalva?
That machine mechanically creates higher pressure air in the nasal cavity that balances out the pressure when you open the eustachian tubes by swallowing...in the same way that you increase pressure with your throat and mouth, and balance out the pressure when you valsalva.
As I understand it, the positive pressure opens up your eustacian tubes while you swallow ... opening your tubes and draining the fluid.