A neural interface arrangement has multiple probes for subdural implantation into or onto a human brain. Each probe has at least one sensing electrode, a coil for receiving power via inductive coupling, signal processing circuitry coupled to the electrode(s), and a transmitter for wirelessly transmitting data signals arising from the electrode(s). An array of coils is implanted above the dura beneath the skull, for inductively coupling with the coil of each probe, and for transmitting power to the probes. A primary coil is connected to the coil array, for inductively coupling with an external transmitter device, and for receiving power from the external transmitter device. In use, the primary coil is operable to receive power from the external transmitter device by inductive coupling and to cause the coil array to transmit power to the probes by inductive coupling, and the probes wirelessly transmit data signals arising from the electrodes.

Implantable transponders comprising no ferromagnetic parts for use in medical implants are disclosed herein. Such transponders may assist in preventing interference of transponders with medical imaging technologies. Such transponders may optionally be of a small size, and may assist in collecting and transmitting data and information regarding implanted medical devices. Methods of using such transponders, readers for detecting such transponders, and methods for using such readers are also described.

An intra-uterine monitoring system is described. The system comprises an implantable sensor device, shaped and dimensioned for implantation in a uterus for measuring conditions within the uterus to generate sensor data, and a wearable receiver device, for wirelessly receiving the sensor data generated by the implantable sensor device. In this way, real-time, in-vivo monitoring of the intra-uterine environment can be performed. The implantable sensor device can be kept small and simple, requiring only the mechanical and electronic structures necessary to take sensor measurements and transmit those to the receiver device. By making the receiver device wearable, it can be kept in relatively close proximity to the implantable sensor device on a long-term basis, making regular monitoring viable.

Anchors and anchoring methods suitable for use with implantable assemblies that include an implantable device, including but not limited to implantable sensing devices and implantable wireless sensing devices adapted to monitor physiological parameters within living bodies. Such an implantable device has a housing containing a transducer, electrical circuitry, and an antenna. The transducer is located at a first end of the housing opposite a second end of the housing. At least the transducer is located within a housing portion of the housing in which the antenna is not located. The implantable assembly further includes an anchor is adapted for securing the implantable device within a living body.

A device and method for determining the severity of sleep apnea using electroencephalography and electromyography. The device includes a headgear having a head pan sized to cover the head of a patient, at least at the locations where the measuring points C3 and C4 of the electroencephalography are situated, and a chin part, and wherein the head part has two electrodes for sensing EEG-signals of the electroencephalography at the electroencephalography points C3 and C4, and the chin part has at least one electrode for sensing the EMG-signal of the electromyography in the chin.

One example device includes a first housing portion defining a first coupling surface; a second housing portion defining a second coupling surface, the first housing portion coupled to the second housing portion to form a housing, the first housing portion and the second housing portion defining an opening, the opening intersecting the first coupling surface and the second coupling surface; a first gasket positioned between the first coupling surface and the second coupling surface, the first gasket providing a first seal between the first housing portion and the second housing portion, a printed circuit board (“PCB”) disposed within the housing and coupled to at least one of the first or second housing portions; an electrical connector electrically coupled to the printed circuit board and positioned within the opening; and a second gasket positioned between the electrical connector and the housing, the second gasket providing a second seal between the electrical connector and the housing, wherein the first gasket is positioned to abut the second gasket and wherein compression of the first gasket between the first and second housing portions provides a third seal between the first gasket and the second gasket. Another example device includes a wireless field driver comprising a first antenna coil and an electrical current source electrically coupled to the first antenna coil; an electromagnetic field (“EMF”) sensor comprising a second antenna coil, wherein the EMF sensor is configured to generate a sensor signal indicative of a signal strength from the first antenna coil; a non-transitory computer-readable medium; and a processor in communication with the non-transitory computer-readable medium, the processor configured to execute processor-executable instructions stored in the non-transitory computer-readable medium to: cause the electrical current source to output a current to the first antenna coil to generate a first EMF; estimate the signal strength of the first EMF based on the sensor signal; and adjust the current to the first antenna coil based on an estimated signal strength of the first EMF to maintain a power characteristic and generate a second EMF at the first antenna coil.

Example medical devices, including example stents and stent systems, are disclosed. An example stent includes an expandable tubular scaffold having a proximal end and a distal end, a first wire coupled to the tubular scaffold, wherein the first wire is shaped into a first coil. The example stent also includes a sensor electrically coupled to the first wire, wherein the sensor is inductively powered by a magnetic field passing through the first wire.

A computer implemented method, system and device are provided. The method transmits an energizing signal from an external antenna, coupled to a local external device (LED), to an implanted antenna of a passive implanted medical device (PIMD). The energizing signal is transmitted while the external antenna is at first and second positions. The method receives, at the external antenna, first and second energy transfer characteristic (ETC) values associated with the first and second positions, respectively. The method is under control of one or more processors configured with program instructions. The method analyzes the first and second ETC values to determine a difference therebetween. The method provides an energy transfer level (ETL) indicator based on the difference between the first and second ETC values. The ETL indicator provides feedback regarding a degree of energy transfer associated with at least one of the first and second positions.

Systems, devices and methods are disclosed that allow recharging a power source located in an implanted medical device implanted in a patient, the recharging device comprising first and second pairs of electrical coils configured to generate first and second uniform magnetic fields in overlapping first and second cylindrical regions located between the respective pairs of electrical coils.

The following relates generally to measuring a patients O.sub.2 level with a mote implanted in the patient's tissue. For example, a mote implanted in a patients tissue may be powered by ultrasound (US) signals generated by an ultrasound interrogator that is external to the patient. Components on the mote may be duty cycled off to advantageously decrease power consumption. A luminescence sensor on the mote may be used to measure the O.sub.2 level, and the luminescence sensor may be optically isolated from the patients tissue by an opaque material such as black silicon.