Disclosed herein are novel contact sensors. The contact sensors disclosed herein include a conductive composite material formed of a polymer and a conductive filler. In one particular aspect, the composite materials can include less than about 10 wt % conductive filler. Thus, the composite material of the contact sensors can have physical characteristics essentially identical to the polymer, while being electrically conductive with the electrical resistance proportional to the load on the sensor. The sensors can provide real time dynamic contact information for joint members under conditions expected during use.

The analyte concentration, such as glucose, in a human or animal body is measured with an implantable sensor that generates measurement signals. The measurement signals are compressed through statistical techniques to produced compressed measurement data that can is easier to process and communicate. A base station carries the implantable sensor along with a signal processor, memory, and a transmitter. A display device is also disclosed that can receive the compressed measurement data from the base station for further processing and display.

Apparatus, which consists of a plurality of modules. Each of the modules has: an insulating frame, a pair of electrodes fixed to the frame at respective locations that are spaced apart, and circuitry configured to receive signals from the pair of electrodes and in response output a differential signal. The apparatus further consists of an insertion tube having distal and proximal ends and containing the plurality of modules in locations spaced longitudinally in proximity to the distal end. There is cabling running through the tube that is connected to convey differential signals from the modules to the proximal end.

The present disclosure provides implants, sensor modules, networks, and methods configured to establish transcutaneous power and transcutaneous bidirectional data communication using ultrasound signals between two or more medical devices located on and within a body of a patient.

Method and apparatus for receiving a first signal from a first working electrode of a glucose sensor positioned at a first predetermined position under the skin layer, receiving a second signal from a second working electrode of the glucose sensor positioned at a second predetermined position under the skin layer, the second signal received substantially contemporaneous to receiving the first signal, detecting a dropout in the signal level associated with one of the first or second signals, comparing the first signal and the second signal to determine a variation between the first and second signals, and confirming one of the first or second signals as a valid glucose sensor signal output when the determined variation between the first and the second signals is less than a predetermined threshold level are provided.

Method and apparatus for receiving a first signal indicative of first glucose levels measured by a first working electrode, receiving a second signal indicative of second glucose levels measured by a second working electrode, detecting a first decrease in an amplitude of the first signal measured by the first working electrode that exceeds a first threshold, detecting a second decrease in an amplitude of the second signal measured by the second working electrode that exceeds the first threshold, selecting the first signal based on determining that the first decrease in the amplitude of the first signal is less than the second decrease in the amplitude of the second signal, determining a rate of change corresponding to the first decrease in the amplitude of the first signal, comparing the rate of change to a second threshold, confirming, based on the comparison, that the first signal is valid.

The present disclosure provides implants, sensor modules, networks, and methods configured to establish transcutaneous power and transcutaneous bidirectional data communication using ultrasound signals between two or more medical devices located on and within a body of a patient.