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Chris-- People over 14 are allowed on this board; so are people under 14. All that's asked is they remain cordial and respectful. Basic rule: When YOU get a little older, perhaps you will learn some things: 1. Some things you can change; some things you can't. The trick is identifying...

A question for the medics (just a hypothetical--not looking for medical ADVICE!!!-grin) If you have heavy allergies and take an effective antihistamine (which doesn't knock you out at depth), are there potential risks should the antihistamine wear off during the dive? One of the risks of...

My apologies--between not having a lot of rest and trying to get this new (for me) board to work, I blathered. The "cranky" doc is right-hyperventilation blows off CO2. I had an airman seize up on the flight line and lock up rigid. A little breathing into the bag, and she was fine...

Hi gang--real interesting discussion on all the theoretical possibilities of conflicting gas retention (BillP and DocV at a party-sheesh) A couple of hypotheses: Hyperventilation leading to CO2 retention seems likely. Mask strap tightness probably not an issue--with the mask flooding...