Is it possible to perfuse chemicals into brain after removal from body?
Of course it is possible to perfuse an organ once it has been removed from the body. It is probably unwise to do so with the brain as the delicacy of the structures and high levels of lipids make rapid fixation necessary and difficult. I think the major obstacle is the speed at which the brain could be removed with arteries intact and then perfused as ultrastructural changes occur rapidly once ischemia (oxygen deprivation) begins.