In this paper, the ethical and legal issues raised by the deactivation of implantable cardioverter-defibrillators in patients with terminal cancer is considered. It is argued that the ICD cannot be well described either as a treatment or as a non-treatment option, and thus raises complex questions regarding how rules governing deactivation should be framed. A new category called “integral devices” is proposed. Integral devices require their own special rules, reflecting their position as a “halfway house” between a form of treatment (...) and a part of the body. The practical problems faced by doctors working in palliative medicine with regard to the deactivation of ICDs are also considered. (shrink)