Abstract: Apparatus including an implant is provided, the implant including: a rod-shaped housing, having a distal half and a proximal half, and configured to be injected distally into tissue of a subject; a cathode on the distal half of the housing; an anchor configured to protrude from the proximal half of the housing, no anchor being configured to protrude from the distal half of the housing; an anode; and circuitry disposed within the housing, configured to drive a current between the cathode and the anode. Other embodiments are also described.

Abstract: An implant comprises: (a) an implant body that comprises: (i) at least a first longitudinal portion of the implant body that defines a given outer diameter; and (ii) a recessed longitudinal portion of the implant body that is radially recessed with respect to the first longitudinal portion of the implant body, such that an outer diameter of the recessed longitudinal portion is less than the outer diameter of the first longitudinal portion; and (b) a cuff coupled to the implant body around the recessed longitudinal portion of the implant body such that an outer diameter of the cuff does not exceed the outer diameter of the first longitudinal portion. The cuff defines a plurality of holes that are configured to facilitate anchoring of the implant body with respect to the subject's tissue, by facilitating tissue growth into the holes. Other embodiments are also described.

Abstract: Apparatus includes an implant and an introducer. The implant includes an injectable housing, an electrode disposed on an outer surface of the housing, and circuitry. The circuitry is configured to alternate between a first mode in which the circuitry drives the electrode to apply a first electrical current having a frequency of 1-100 Hz, and a second mode in which the implant applies a second electrical current having a frequency of 1-10 kHz. The introducer includes a tube that defines a lumen and is percutaneously-advanceable into tissue of the subject, the lumen being dimensioned to at least temporarily house the implant. The introducer is configured to deploy the implant from a distal end of the lumen by moving the implant and the distal end of the lumen relative to each other. Other embodiments are also described.

Abstract: An implant includes tissue-contacting electrodes; at least one implant antenna configured to receive wireless power; and implant circuitry configured to use the received wireless power to drive the one or more electrodes to apply a current. A hand-held controller includes: (i) one or more controller antennas, configured to transmit the wireless power, and to communicate with a consumer device; (ii) a battery configured to store battery power; and (iii) controller circuitry configured to: (a) use the battery power to drive at least one of the controller antennas to transmit the wireless power, (b) identify a position of the controller with respect to the implant, and (c) drive at least one of the controller antennas to transmit juxtaposition information to the consumer device about the position of the controller with respect to the implant.

Abstract: An electrostimulator implant is percutaneously advanceable into tissue of a limb of a subject. The implant comprises (i) an intracorporeal sensor, configured to detect a factor indicative of local blood supply in the tissue of the limb; (ii) an electrode disposed at an outer surface of the implant; (iii) an antenna, configured to wirelessly receive power; and (iv) circuitry, powered by the received power, and configured to drive the electrode to apply a bloodflow-increasing current to the tissue at least in part responsively to the detected factor. Other embodiments are also described.

Abstract: Apparatus, comprising (1) a first controller comprising at least one first-controller antenna configured to transmit a first wireless power signal having a first signal power; and a first-controller control unit configured to use battery power to drive the first-controller antenna; (2) a second controller, comprising at least one second-controller antenna, configured to transmit a second wireless power signal having a second signal power; and a second-controller control unit, configured to use mains electricity power to drive the second-controller antenna; and (3) an implant, comprising one or more electrodes; at least one implant antenna configured to receive 1-10 percent of the first signal power, and to receive 0.01-1 percent of the second signal power; and circuitry configured to drive the one or more electrodes responsively to the received 1-10 percent of the first signal power, or the received 0.01-1 percent of the second signal power.

Abstract: An electrostimulator implant comprises (i) an implant body, the implant being injectable into tissue of a subject along a longitudinal axis of the implant body, (ii) first and second electrodes, disposed on respective first and second portions of the implant body; (iii) circuitry, disposed inside the implant body, and configured to drive the electrodes to apply current to the tissue; and (iv) a mesh. The mesh is configured to serve as an anchor of the implant, is disposed over a third portion of the implant body that is longitudinally between the first and second portions of the implant body, and has a first end and a second end. Each of the ends is fixedly attached to respective first and second sites of the implant body, the respective sites being longitudinally between the first and second electrodes.

Abstract: An electrostimulator implant comprises (i) an implant body, the implant being injectable into tissue of a subject along a longitudinal axis of the implant body, (ii) first and second electrodes, disposed on respective first and second portions of the implant body; (iii) circuitry, disposed inside the implant body, and configured to drive the electrodes to apply current to the tissue; and (iv) a mesh, disposed over at least 50 percent of the implant body, and configured to serve as an anchor of the implant. Other embodiments are also described.

Abstract: An electrostimulator implant comprises (i) an implant body, the implant being injectable into tissue of a subject along a longitudinal axis of the implant body, (ii) first and second electrodes, disposed on respective first and second portions of the implant body; (iii) circuitry, disposed inside the implant body, and configured to drive the electrodes to apply current to the tissue; and (iv) a mesh, disposed over at least 50 percent of the implant body, and configured to serve as an anchor of the implant. Other embodiments are also described.

Abstract: Apparatus is provided, comprising: (a) an implantable excitation unit, configured to induce action potentials in a nerve of a subject by applying an excitatory current; (b) an implantable blocking unit, configured to block the induced action potentials from propagating along the nerve by applying a blocking current; and (c) an extracorporeal controller, comprising circuitry configured: (i) to wirelessly drive the excitation unit to apply the excitatory current, (ii) in a first mode, to wirelessly drive the blocking unit to apply the blocking current while not driving the excitation unit to apply the excitatory current, (iii) in a second mode, to wirelessly drive the blocking unit to apply the blocking current while driving the excitation unit to apply the excitatory current, and (iv) to wirelessly alter a parameter of the blocking current, based on sensing performed while the extracorporeal controller is in the second mode.

Abstract: An electrostimulator implant is percutaneously advanceable into tissue of a limb of a subject. The implant comprises (i) an intracorporeal sensor, configured to detect a factor indicative of local blood supply in the tissue of the limb; (ii) an electrode disposed at an outer surface of the implant; (iii) an antenna, configured to wirelessly receive power; and (iv) circuitry, powered by the received power, and configured to drive the electrode to apply a bloodflow-increasing current to the tissue at least in part responsively to the detected factor. Other embodiments are also described.

Abstract: Apparatus including an implant is provided, the implant including: a rod-shaped housing, having a distal half and a proximal half, and configured to be injected distally into tissue of a subject; a cathode on the distal half of the housing; an anchor configured to protrude from the proximal half of the housing, no anchor being configured to protrude from the distal half of the housing; an anode; and circuitry disposed within the housing, configured to drive a current between the cathode and the anode. Other embodiments are also described.

Abstract: Apparatus, comprising (1) a first controller comprising at least one first-controller antenna configured to transmit a first wireless power signal having a first signal power; and a first-controller control unit configured to use battery power to drive the first-controller antenna; (2) a second controller, comprising at least one second-controller antenna, configured to transmit a second wireless power signal having a second signal power; and a second-controller control unit, configured to use mains electricity power to drive the second-controller antenna; and (3) an implant, comprising one or more electrodes; at least one implant antenna configured to receive 1-10 percent of the first signal power, and to receive 0.01-1 percent of the second signal power; and circuitry configured to drive the one or more electrodes responsively to the received 1-10 percent of the first signal power, or the received 0.01-1 percent of the second signal power.