Not only has MediDive developed the Asthma Freedom Snorkel so swimmers can enjoy cruising the surface, they've also been busy trying to help asthmatics get down deeper. Consequently, they've developed the MediDive regulator. Although MediDive maintains that not all asthmatics should go diving, they claim that -- when used in conjunction with a medical selection protocol and MediDive training materials -- the MediDive reg can break underwater barriers that have heretofore restricted asthmatics.

Combining a high quality regulator with a discrete chamber that contains a puffer canister, the MediDive reg features a twist mechanism that releases doses of carefully-measured medication when needed; the same mechanism also resets the device for the next delivery. Allowing users to remove their canister for topside use, the reg can be used at depth even with gloved hands. It doesn't appear that the MediDive reg is available for purchase yet, but if you're interested, you can "register your interest."