When the dust has settled on CCSVI and MS, Putnam's name will be invoked as well as Franz Schelling's as early proponents of what led to Dr Zamboni's amazing discovery :
I know people are trying like crazy to believe in CCSVI as the cause of MS, but statements like these are wrong, and are the problem with only reading excerpts or abstracts. I was able to obtain copies of Dr. Putnams's paper on his dog experiments, as well as literature on his treatment approach to MS. I don't have the energy right now to re-post them, but in another thread I quoted passages from one of his papers. He injected various fats back into the cerebral veins of the dogs, causing thrombosis in the veins. This is not
the same as CCSVI. Though the some of the dogs did develop brain lesions, none showed clinical signs similar to MS. His belief that thrombosis caused MS is why he treated patients with anti-coagulants, which did not produce great results.
And looking at Putnams's experiments, they do not seem to be difficult or costly. So, despite all the conspiracy theories as to why his work is not better known, possibly the simple answer is that his experiments did not produce results worth further study.