An apparatus includes a housing configured to be placed over a portion of skin of a recipient, the portion of skin overlaying an implanted device. The apparatus further includes circuitry within the housing. The circuitry is configured to wirelessly communicate with the implanted device. The apparatus further includes a unitary magnet in mechanical communication with the housing. The magnet includes at least one first magnetic dipole moment having a first magnitude and a first direction and at least one second magnetic dipole moment having a second magnitude substantially equal to the first magnitude and a second direction substantially opposite to the first direction.

The disclosure relates to an implant comprising an electrode connection device and a housing, wherein a cover for closing the housing is formed on the electrode connection device. A method for producing an implant is also disclosed.

Techniques for switching an implantable medical device (IMD) from a first mode to a second mode in relation to signals obtained from internal sensors are described. The internal sensors may include a temperature sensor and a biosensor. In some examples, processing circuitry of the IMD may make a first preliminary determination that the IMD is implanted based on a first signal from the temperature sensor. In response to the first preliminary determination being that the IMD is implanted, the processing circuitry may make a second preliminary determination that the IMD is implanted based on a second signal from the biosensor. The processing circuitry may switch the IMD from a first mode to a second mode based on both the first preliminary determination and the second preliminary determination being that the IMD is implanted.

The invention relates to an energy transfer system (300) for wireless energy transfer with a transmitter unit (100) and a receiver unit (200) separate from the transmitter unit, wherein the transmitter unit (100) has a primary coil (L.sub.1) that can be supplied with a predetermined supply voltage (U.sub.v), and wherein the receiver unit (200) has a secondary coil (L.sub.2) to which a DC link capacitor (C.sub.z) is connected by a rectifier (210). According to the invention, the energy transfer system (300) comprises a device (230) designed to determine a value of a DC link voltage (U.sub.z) applied on the DC link capacitor (C.sub.z) when the supply voltage (U.sub.v) is applied on the primary coil (L.sub.1), and a device (240) designed to perform at least one predetermined function based on the determined value of the DC link voltage (U.sub.z) or a variable (K) derived therefrom. The invention also relates to a receiver unit (200) configured to interact for wireless energy transfer with a transmitter unit (100) separate from the receiver unit, said transmitter unit (100) comprising a primary coil (L.sub.1) that can be supplied with a supply voltage (U.sub.v), wherein the receiver unit (200) comprises a secondary coil (L.sub.2) to which a DC link capacitor (C.sub.z) is connected by a rectifier (210). According to the invention, the receiver unit contains a device (230) designed to determine a value of a DC link voltage (U.sub.z) applied on the DC link capacitor (C.sub.z) when a supply voltage (U.sub.v) is applied on the primary coil (L.sub.1) and a device (240) designed to perform at least one predetermined function based on the determined value of the DC link voltage (U.sub.z) or a variable (K) derived therefrom.

An implantable medical device (IMD) has a housing enclosing an electronic circuit. The housing includes a first housing portion, a second housing portion and a joint coupling the first housing portion to the second housing portion. A polymer seal is positioned in the joint in various embodiments. Other embodiments of an IMD housing are disclosed.

Systems and methods for providing neural stimulation and recording on a subject using flexible complementary CMOS probes are provided. Disclosed systems can include a flexible probe adapted for insertion into a portion of a brain of the subject, the flexible probe comprising a tail portion and a head portion. The tail portion can include a plurality of electrodes configured to be coupled to the brain and a plurality of front-end amplifiers. Each of the plurality of front-end amplifiers can be configured to amplify a signal received from a corresponding electrode of the plurality of electrodes. The head portion can include one or more inductors configured to enable two-way communication with a wireless reader through a near-field inductive link.

Technologies disclosed herein can be used to provide power and data to an implantable device implanted in a recipient, such as when the recipient is not wearing an external device. An example system includes a pillow or other headrest configured as a power and data source for an implanted medical device. Disclosed technologies can be configured to continuously provide power and data to an implantable medical devices over a period of time, such as substantially the entire period of time where the recipient is resting their head on the pillow.

A method for managing power during communication with an implantable medical device, including establishing a communications link, utilizing a power corresponding to a session start power, to initiate a current session between an implantable medical device (IMD) and external device. A telemetry break condition of the communications link is monitored during the current session. The power utilized by the IMD is adjusted between low and high power levels, during the current session based on the telemetry break condition. The number of sessions is counted, including the current session and one or more prior sessions, in which the IMD utilized the higher power level, and a level for the session start power to be utilized to initiate a next session following the current session is adaptively learned based on the counting of the number of sessions.

A system includes an implantable medical device (IMD) and processing circuitry. The IMD includes sensing circuitry configured to sense cardiac electrical signals of a patient, and therapy delivery circuitry configured to deliver demand cardiac pacing to a heart of the patient based on the cardiac electrical signals. The processing circuitry is configured to: determine, for each of a plurality of time units, based on the cardiac electrical signals and the delivery of demand cardiac pacing during the time units, a plurality of metrics indicative of a need for continued delivery of demand cardiac pacing to the heart of the patient. The plurality of metrics includes a metric associated with a duration of one or more pacing episodes during the time unit. The processing circuitry is further configured to generate a graphical representation of the plurality of metrics of the plurality of time units for presentation to a user.

The present disclosure generally provides methods of implanting an implantable device in contact with a brain of a subject. Also provided are kits and systems for the implantation of one or more implantable devices.