Abstract: An implantation system includes a stylet comprising an elongate member and a first mating feature at a distal end of the elongate member, as well as an implantable device configured to receive a wireless signal and to generate one or more electrical pulses from the wireless signal for exciting a tissue. The implantable device includes a body defining a longitudinal axis of the implantable device, multiple electrodes distributed along the body and configured to deliver the one or more electrical pulses, and a second mating feature disposed in-line with the longitudinal axis of the implantable device and defining a proximal end of the implantable device. The second mating feature is configured to mate with the first mating feature such that the stylet and the implantable device can be delivered percutaneously to a patient together as an assembly.

Abstract: Some implementations may provide an implantable wirelessly powered device that includes: one or more electrodes configured to apply one or more electrical pulses to an excitable tissue; and a first antenna configured to: receive, from a second antenna and through electrical radiative coupling, an input signal containing electrical energy, the second antenna being physically separate from the implantable device; and one or more circuits electrically connected to the first antenna, the circuits configured to: create the one or more electrical pulses suitable for stimulation of excitable tissue using the electrical energy contained in the input signal; and supply the one or more electrical pulses to the one or more electrodes, wherein the implantable device is shaped and arranged for delivery into a subject's body through an introducer or a needle of 18 gauge or smaller.