Nitrox and disability

Please advise whether there would be any problems for a disabled diver, (disability to right arm due to a road accident in 1958), to dive with NITROX up to 40% 02.

Generally speaking, diving with nitrox should not pose any different problem
than diving with air, for the kind of problem described. A full medical evaluation, to include neurological function and performance test is advisable to rule our any possible situation that the simple description provided did not clarify.