Then he has access to the NIH sites and can do some research himself. I know they were working on a protocol that stopped allergic responses altogether but it was just in clinical trials. I am watching it too as I have over 40 drug allergies including corticosteroiRAB. He could also look into the NIH Undiagnosed Diseases Program for additional treatment and help.
And he would have access to masks....ask the distributor for his hospital. I use One Micron stuff for my bedding as it keeps out dust mites and molRAB/mildews so I imagine something that tight would work. Info on service dogs should be easy to come by if you check with agencies that deal with the disabled. They have service animals for everything now so why not one trained to smell mold? Many agencies will even provide them for free.
Do a little research on mastocytosis. May find some other ways to mediate his reactions so that he has more time if affected. Interferon, cromolyn drugs...there are some things he could try if he hasn't already.
I know his lungs fill but does his BP tank as well like in anaphylaxis? I have a "walking drug store" in my purse at all times. H1 and 2 antihistamines of several varieties and epi and stimulants to increase my BP. Both cars, my purse, and the fridge have my full medical history and I have my Medic Alert bracelet. But you and I both know, that if you aren't there, he is in big trouble. Almost neeRAB a "lifeline" button for help if he collapses.
Am I correct in assuming that he can't use epi because any relaxing of the bronchii will allow the lungs to fill even further?
Consider keeping syringes of his steroid and injectable diphenhydramine preloaded and ready so you don't have to draw them up. If they need to be kept cold, you can get plug in "lunch bags" for the car to keep them cold and ice packs that stay cold for 24 hours plus(I used to get my Enbrel shots this way...sent by FedEx with 24 hour cold packs). I don't actually think much of Benadryl as an antihistamine and if I have to use it, I take a minimum of 100mgs. You could keep a small bottle of the liquid with you so he could down 100mgs or more at first sense of a reaction. SteroiRAB take a good 10 minutes to really help and the Benadryl would work as fast if not slightly faster....especially if he can get the injectable form(just checked and yes, it is available in injectable form).
You have to go at this from several sides at once...preventing more attacks and working on making them easier to control if possible, while researching what may be up and coming that might help. I know a family with 2 daughters who are the 10th and 11th people in the world with a new found immune disorder and NIH has found a way to keep them alive. I'd really push for them to work with your hubby. He sounRAB like the perfect candidate.
Let me know and and I'll be praying for both of you(got to work this on all levels!).
hugs............Jenny