purbeast
Contributor
You always have to realize that doctors are EXTREMELY risk averse. Nobody wants to give you an offhand clearance to dive, and then have you get a gas embolism and be injured or dead, because then it would be their fault for having cleared you.
An evaluation for fitness to dive in an asthmatic would involve at the very least pulmonary function testing (where you breathe into a machine, and it records flow rates and pressures and volumes) to see if there is evidence of obstruction. That's the big risk with asthma, that air can get in but can't get out, and then you embolize.
From your history, I think there is a reasonable likelihood that you will pass PFTs. But they should be done, and no physician is going to give you clearance until they have been.
well I did get a pulmonary test, and for what its worth, here is a picture of the test results.