Abstract: Circuits for rendering piezo-based respiratory belts compatible with polysomnograph (PSG) machines designed for use with respiratory induction belts (RIPs) comprise an instrumentation amplifier adapted to be connected to a piezoelectric transducer and providing an AC output signal to a low-pass filter. In a first embodiment, the low-pass filter output is applied to an input of a microcontroller's A to D converter and the resulting digitized samples are used to vary the resistance of a digital potentiometer whose wiper terminal is coupled in series with an inductor so as to emulate the presence of a RIP belt to the PSG machine. In a second embodiment, the low-pass filter output is used to drive the primary of a transformer so as to vary the permeability of the transformer's ferrite core in a way that emulates the performance of a RIP belt to the PSG.

Abstract: This document discusses, among other things, a system and method for generating a sleep therapy stimulus waveform for a patient. Stimulus sequence information can be selected from a sequence memory array, and stimulus sequence information can be received from the sequence memory array at a stimulus generator selector. A generator select signal can be provided to a stimulus generator of a closed loop neuromodulator using the stimulus sequence information and a stimulus duration signal, wherein the generator select signal can include stimulus type information related to stimulus pulses generated using the closed loop neuromodulator.

Abstract: Circuits for rendering piezo-based respiratory belts compatible with polysomnograph (PSG) machines designed for use with respiratory induction belts (RIPs) comprise an instrumentation amplifier adapted to be connected to a piezoelectric transducer and providing an AC output signal to a low-pass filter. In a first embodiment, the low-pass filter output is applied to an input of a microcontroller's A to D converter and the resulting digitized samples are used to vary the resistance of a digital potentiometer whose wiper terminal is coupled in series with an inductor so as to emulate the presence of a RIP belt to the PSG machine. In a second embodiment, the low-pass filter output is used to drive the primary of a transformer so as to vary the permeability of the transformer's ferrite core in a way that emulates the performance of a RIP belt to the PSG.

Abstract: This document discusses, among other things, a system and method for anti-habituating sleep therapy using a closed loop neuromodulator. A first sleep disorder event can be detected using first activity information, and a first series of stimuli can be provided, in response to the first sleep disorder event, using a set of stimulus parameters. A habituation event can be detected and anti-habituation stimulation parameter can be adjusted to avoid patient habituation to the stimuli.

Abstract: This document discusses, among other things, a system and method for generating a sleep therapy stimulus waveform for a patient. Stimulus sequence information can be selected from a sequence memory array, and stimulus sequence information can be received from the sequence memory array at a stimulus generator selector. A generator select signal can be provided to a stimulus generator of a closed loop neuromodulator using the stimulus sequence information and a stimulus duration signal, wherein the generator select signal can include stimulus type information related to stimulus pulses generated using the closed loop neuromodulator.

Abstract: This document discusses, among other things, an apparatus and method for receiving respiration information of a patient and for providing a stimulation to the patient using a hybrid circuit. The hybrid circuit includes a control input for receiving a control signal having a first and second state. A sense switch of the hybrid circuit can provide respiration information from a pyro/piezoelectric film sleep sensor and stimulator to a closed loop neuromodulator in response to the first state. A stimulation switch of the hybrid circuit can provide stimulation energy from the closed loop neuromodulator to the pyro/piezoelectric film sensor and stimulator in response to the second state. The hybrid circuit can couple to the pyro/piezoelectric film sensor and stimulator using a single wire pair.

Abstract: This document discusses, among other things, an apparatus and method for detecting respiration information of a patient and for providing a stimulation to the patient. A sleep sensor transducer includes a pyro/piezoelectric film. A first and second electrode can attach to the film to transmit the detected respiration information to a closed loop neuromodulator and to receive stimulation energy from the closed loop neuromodulator to provide the stimulation.

Abstract: This document discusses, among other things, an apparatus and method for transmitting biomedical data of a patient. Biomedical data of the patient can be transmitted using one or more wireless transceivers. The wireless transceiver can include a pyro/piezoelectric sensor for detecting the biomedical data of the patient. Examples include wirelessly communicating the biomedical data to a base station coupled to a polysomnograph (PSG) machine or a sleep therapy device.

Abstract: This document discusses, among other things, a system and method for detecting biomedical data of a patient. Biomedical data of the patient can be detected using one or more wireless sensors. The wireless sensor can include pyro electric and piezo electric properties and can be coupled to a wireless transceiver to receive the biomedical data. Examples include wirelessly communicating the biomedical data to a base station coupled to a polysomnograph (PSG) machine or a sleep therapy device.

Abstract: This document discusses, among other things, a system and method for detecting biomedical data for diagnosing sleep disorders of a patient. Biomedical data of the patient can be detected using one or more wireless sensors. The biomedical data can be processed to separate various information including respiration temperature and pressure information. The various information can be wirelessly communicated to a base station coupled to a polysomnograph (PSG) machine configured to display the information for diagnosing sleep disorders.

Abstract: This document discusses, among other things, an apparatus and method for receiving biomedical data of a patient. Biomedical data of the patient can be wirelessly received using a wireless sensor base station including a transceiver to receive the biomedical data from a wireless sleep sensor. A demultiplexer of the wireless sensor base station can separate respiration information from the biomedical data. Examples include providing the biomedical data to a polysomnograph (PSG) machine or a sleep therapy device using an output of the wireless sensor base station.

Abstract: This document discusses, among other things, a system and method for anti-habituating sleep therapy using a closed loop neuromodulator. A first sleep disorder event can be detected using first activity information, and a first series of stimuli can be provided, in response to the first sleep disorder event, using a set of stimulus parameters. A habituation event can be detected and anti-habituation stimulation parameter can be adjusted to avoid patient habituation to the stimuli.

Abstract: This document discusses, among other things, a system and method for generating a sleep therapy stimulus waveform for a patient. Stimulus sequence information can be selected from a sequence memory array, and stimulus sequence information can be received from the sequence memory array at a stimulus generator selector. A generator select signal can be provided to a stimulus generator of a closed loop neuromodulator using the stimulus sequence information and a stimulus duration signal, wherein the generator select signal can include stimulus type information related to stimulus pulses generated using the closed loop neuromodulator.

Abstract: This document discusses, among other things, a system and method for optimizing a sleep therapy using a closed loop neuromodulator. A first sleep disorder event can be detected using first activity information, and a first stimulus can be provided, in response to the first sleep disorder event, using a set of stimulus parameters. Termination of the first sleep disorder event can be detected using second activity information, and at least one therapy parameter can be adjusted to decrease an energy level of a subsequent stimulus.

Abstract: This document discusses, among other things, a system and method for providing a stimulus signal of a closed loop neuromodulator configured to optimize sleep therapy for a patient. A stimulus select signal can be received at a plurality of stimulus type generators from a stimulus sequencer of the closed loop neuromodulator, and a stimulus signal can be provided using one of the plurality of stimulus type generators in response to the stimulus select signal. An amplified stimulus signal can be provided to a stimulus escalator of the closed loop neural modulator to optimize sleep therapy for the patient.

Abstract: This document discusses, among other things, method and apparatus for detecting abnormal respiration activity. Clock pulses can be passed through a first gate when digital airflow information indicates a first respiration state, summed, and compared to a first count threshold, and a respiration activity output can be generated using the comparison.

Abstract: This document discusses, among other things, a system and method for communicating sleep therapy information between a closed loop neuromodulator, configured to optimize sleep therapy, and a remote diagnostic terminal. A state machine can control the closed loop neuromodulator, by exchanging the sleep therapy information with using a device register, and the sleep therapy information can be routed between the device register and the state machine using an internal data bus.

Abstract: This document discusses, among other things, a system and method for modulating an energy level of a sleep therapy stimulus signal for a patient. A stimulus driver signal can be provided to a closed loop neuromodulator using a stimulus signal and a stimulus duration signal, and an energy level of the stimulus signal can be adjusted using a selected escalation envelope function.

Abstract: This document discusses, among other things, a system and method for preventing stimulus delivery to a patient for a predetermined interval after commencing sleep therapy to ensure that the patient is asleep. An indication of abnormal respiration activity can be received from an activity detector of a closed loop neuromodulator at a therapy delay gate. The indication of abnormal respiration activity can be provided to a sleep disorder gate after a predetermined delay interval following commencement of the sleep therapy. A sleep disorder event can be detected if the indication of abnormal respiration activity exceeds a predetermined sleep disorder interval, and a stimulus start signal can be provided to the closed loop neuromodulator in response to the detected sleep disorder event.

Abstract: This document discusses, among other things, a system and method for protecting electronics of a closed loop neuromodulator, configured to optimize sleep therapy for a patient, from electromagnetic interference (EMI) or electrostatic discharge (ESD). A transducer signal can be provided, at an output of a hardened sensor interface, to a sleep therapy transducer. EMI can be reduced between the output and the electronics using an EMI filter and a grounded metal shield, and an ESD protection device, coupled to the grounded metal shield, can be provided to protect the electronics of the closed loop neuromodulator from an energy surge.