In general, the invention is directed to apparatus and techniques that aid
in the removal or explantation of an implantable medical device (IMD)
under the scalp of a patient. The various embodiments of the invention
address risks associated with the explantation, such as the risk of
damage to leads, the risk of damage to the IMD, the risk that the
incision may hinder the explantation, and the risk that the IMD may be
difficult to remove. In some embodiments, the invention is directed to
apparatus that help the surgeon identify the location of the implanted
elements, and that protect the implanted elements from inadvertent
damage. In other embodiments, the invention is directed to techniques
that facilitate the removal of the IMD.