Is it possible to use electrical devices on Shabbat for health?

The use of electrical devices for saving one's life in a life threatening situation is permitted. The Torah commands us to desecrate one Shabbat to save one's life in order that this person keep many Shabbatot. Any other health situation, a Rabbi must be consulted with specific details for each case to judge how severe things are medically , what medical alternatives exist and so on. Shanna tova