We've been discussing this on the veterinary lists. There are at least four things in that article, that if true, are ... well, they shouldn't be.
Very, very sad.
Edit: here is a more detailed story
http://www.ocala.com/article/2012021...NEWS?p=1&tc=pg
The article does lack some information on animal hyperbaric chamber use.
In human medicine, hyperbaric chamber operators, doctors, nurses, are certified as such by the National Board of Diving and Hyperbaric Medicine Technology. You take a specific intensive detailed course regarding hyperbaric medicine, uses and research, how the chamber works (including safety), basic physics, etc., then have practical training, then you pass a detailed certification exam (I took this course, as a veterinarian, in Texas at a human hospital hyperbaric facility with human doctors)
There is also the Underseas and Hyperbaric Medical Society, and the American College of Hyperbaric Medicine for doctors.
In veterinary medicine, the above organization NBDHMT just created a "veterinary" certified hyperbaric technologist position, due to the recent years increased use of hyperbaric chambers with animals (interested veterinarians used to take the human doctor course, then extrapolate to our patients).
There is indeed a Veterinary Medical Hyperbaric Society
http://www.vet.utk.edu/vhms/ of interested practitioners and researchers, which has the goal of standardizing medical training, clinical research, clinical treatments, safety and appropriate certification as the specialized aspect of veterinary practice hyperbaric medicine is. The American Veterinary Medical Association supports that, too.
At this time, while human medicine and law recognizes human hyperbaric medicine and controls it, anybody can purchase a real hyperbaric chamber, and put animals in it. Very common in the equine world. Operators and users don't have to be trained, certified or anything. You don't need a medical license to purchase oxygen for your chamber (a drug requiring same for hospital use), you can be sold, by the same oxygen company, "non-medical oxygen" to use for a chamber for animals.
Although hyperbaric medicine and "using hyperbaric chambers" (two different things, IMO) is overall extremely safe, if something goes wrong, it can go wrong in a very bad way, as we've unfortunately seen in both human and animal medicine. The veterinary professions most common position is that hyperbaric medicine use in animals should fall under the purvue of veterinary medicine. I support that for all the reasons given.
Note: you can go on the internet and purchase a "home hyperbaric chamber" - this is not the same thing as a "real" chamber that can support higher pressures.