Multiple sclerosis 'blood blockage theory'

http://news.bbc.co.uk/1/hi/health/8374980.stm

We remain sceptical about this theory; venous outflow obstruction does not explain the epidemiology of MS and falls down short on many other observations.

The interventions required to relieve venous obstruction are not without risks. The 'blood blockage theory' remains a theory and any involvement with the theory should be via ethically approved research studies.