An example device includes an elongated housing, a first and second electrode, and signal generation circuitry. The housing can be implanted within a single first chamber of the heart. The first electrode extends distally from the distal end of the elongated housing. A distal end of the first electrode can penetrate into wall tissue of a second chamber of the heart. The second electrode, extending from the distal end of the elongated housing, is configured to flexibly maintain contact with the wall tissue of the first chamber without penetration of the wall tissue of the first chamber by the second electrode. Signal generation circuitry can be within the elongated housing and coupled to the first and second electrode. The signal generation circuitry can deliver cardiac pacing to the second chamber via the first electrode and the first chamber via the second electrode.

An implantable medical device configured to deliver pacing therapy, the implantable medical device including a device body configured to position within a heart, where the device body comprises a proximal body portion and a distal body portion and defines a longitudinal axis extending through the proximal body portion and the distal body portion, the proximal body portion is configured to rotate around the longitudinal axis relative to distal body portion, and a leadlet mechanically coupled to the device body, where the leadlet mechanically supports an electrode configured to deliver pacing therapy, and where in response to the proximal body portion rotating relative to the distal body portion, the device body is configured to alter an extension length of the leadlet.

A wireless power transfer system that employs a form of conductively coupled power transfer to transfer energy to deeply implanted devices.

An electrode assembly for the positioning of an electrode of an implantable medical lead includes a housing and an electrode subassembly. The housing includes a proximal end for connecting to the lead and a distal end. The housing defines a housing lumen extending between the proximal end and the distal end. The housing lumen includes internal screw threads extending along at least a portion of the housing lumen. The electrode subassembly is disposed at least partially within the housing lumen. The electrode subassembly includes a needle electrode and a coupler. The needle electrode is disposed coaxially with the longitudinal axis of the housing lumen. The coupler is disposed at a proximal end of the needle electrode. The coupler includes external screw threads engaged with the internal screw threads of the housing lumen such that rotation of the coupler moves the needle electrode along the longitudinal axis of the housing lumen.

An implantable medical device comprises a housing, a circuit board structure arranged within in the housing and comprising at least one flexible section, an electronic module comprising at least one electronic component arranged on the circuit board structure, and an energy storage device for providing electrical energy for operation of the implantable medical device. The energy storage device is a solid-state battery mounted on the circuit board structure. An energy generation device connected to the energy storage device is a secondary cell, wherein the energy generation device is configured to convert patient energy to electrical energy for charging the energy storage device.

An implant insertion device includes a vibrational actuator generating axial vibrations, a coupler interconnected to the actuator and selectively retaining an implant with penetrating electrodes. The coupler has a distal end cavity at one end dimensioned to receive and retain at least a portion of the implant. Vibrations are transferred to the electrodes during insertion. A vacuum assembly connects to the coupler and provides a negative pressure, or suction force, when a vacuum source is attached and activated. This suction force is sufficient to hold the implant to the distal end of the coupler. Deactivation of the vacuum source removes the suction force, causing the implant to detach from the coupler without perturbation of position. The insertion device may then be removed. A system to coordinate the operation of the actuator and movement of the device and/or tissue relative to one another for delivery of the implant is also provided.

An implantation and/or retrieval device for a leadless cardiac pacing device may include a first elongate shaft including a lumen; a second elongate shaft slidably disposed within the lumen of the first elongate shaft; an end cap assembly fixedly attached to a distal end of the first elongate shaft; and a plurality of wires attached to the second elongate shaft and extending distally from the end cap assembly, the plurality of wires being movable relative to the end cap assembly. The plurality of wires is configured to engage a proximal hub of the leadless cardiac pacing device. The plurality of wires forms a plurality of wire loops extending distally from the end cap assembly.

Techniques for placing implantable electrodes to treat sleep apnea, and associated devices, systems, and methods are disclosed herein. A representative method includes percutaneously implanting one or more signal delivery devices, each at or near a respective target signal delivery location in a patient. Each signal delivery device can include one or more electrodes, and individual ones of the electrodes can be positioned to produce a net positive protrusive motor response of the patient's tongue. The representative method further includes providing power to one or more of the electrodes from a wearable power source to cause the electrode(s) to deliver an electrical signal to the respective target signal delivery location(s) to produce the net positive protrusive motor response.

A universal low-profile intercranial assembly includes a mounting plate and a low profile intercranial device composed of a static cranial implant and an interdigitating functional neurosurgical implant. The low profile intercranial device is shaped and dimensioned for mounted to the mounting plate.

Presented herein are systems, methods, and devices that provide for stimulation of nerves and/or targets such as mechanoreceptors, tissue regions, mechanoresponsive proteins, and vascular targets through generation and delivery of mechanical vibrational waves. In certain embodiments, the approaches described herein utilize a stimulation device (e.g., a wearable device) for generation and delivery of the mechanical vibrational waves. As described herein, the delivered vibrational waves can be tailored based on particular targets (e.g., nerves, mechanoreceptors, vascular targets, tissue regions) to stimulate and/or to elicited particular desired responses in a subject.