Abstract: An implantable restraint is provided that includes an opening-configured to receive a tissue anchor; a pair of protrusions between the opening and a distal edge, providing an anchor resistance to a longitudinal force; where the pair of protrusions are further configured to separate by a distance approximately equal to the tissue anchor when the longitudinal force exceeds a first predetermined threshold, such that the pair of protrusions moves past the tissue anchor. By providing one or more openings extending through the substrate, the growth of tissue which naturally occurs after implantation is utilized to assist in securing the implantable restraint at the implantation site. By providing the pair of protrusions configured to provide resistance, a high degree of control of the restraining force and the explantation force is provided.

Abstract: During charging of implantable devices via inductive coupling, heat may be produced within the implantable device, so control of the charging may be desirable to reduce or avoid the risk of undesirable tissue heating. Exchanging parameters relevant for charging may prevent undesirable heating, but typically increase the complexity of the devices used. An implantable device is provided, for wirelessly receiving energy pulses, monitoring the energy storage, and transmitting a first sufficient energy signal if the energy storage exceeds a first maximum value. An associated energy transmission device is provided, for wirelessly transmitting a plurality of successive energy pulses transmitted at a first power level, pausing energy transmission immediately after the first sufficient energy signal is received, and subsequently resuming energy pulse transmission at the first power level if no further sufficient energy signal is received.