By applying a dry and freeform cut-and-paste method, an NFC-enabled wireless tattoo-like stretchable biometric sensor can be fabricated within minutes without using any chemicals, inks, or masks/stencils. This sensor is able to wirelessly receive power via a stretchable inductive coil and an NFC chip integrated on the sensor. Data measured by the sensor can be wirelessly transmitted via the same antenna and NFC chip. The sensor is fully stretchable and conformable to human skin and can follows the mechanical deformation of skin without mechanical and electrical failure or delamination. The sensor is imperceptible to wear and can perform high-fidelity sensing for physiological signals. Depending on where the sensor is applied, possible applications include measuring physiological signals such as skin thermography (body temperature), photometry (pulse oximetry, heartbeat), electrograms (ECG, EEG, EMG, EOG), electrical impedance (skin hydration, body fat) and mechanical motion (seismocaridogram, respiratory rate, joint bending).

By applying a dry and freeform cut-and-paste method, an NFC-enabled wireless tattoo-like stretchable biometric sensor can be fabricated within minutes without using any chemicals, inks, or masks/stencils. This sensor is able to wirelessly receive power via a stretchable inductive coil and an NFC chip integrated on the sensor. Data measured by the sensor can be wirelessly transmitted via the same antenna and NFC chip. The sensor is fully stretchable and conformable to human skin and can follows the mechanical deformation of skin without mechanical and electrical failure or delamination. The sensor is imperceptible to wear and can perform high-fidelity sensing for physiological signals. Depending on where the sensor is applied, possible applications include measuring physiological signals such as skin thermography (body temperature), photometry (pulse oximetry, heartbeat), electrograms (ECG, EEG, EMG, EOG), electrical impedance (skin hydration, body fat) and mechanical motion (seismocaridogram, respiratory rate, joint bending).

A far-infrared emitters with physiological signal detection and method of operating the same is disclosed. A far-infrared beam module is switched on and generates far-infrared beam irradiating to a human body when a control unit starting up a microwave detecting module detecting physiological signal of the human body. The control unit is switched off when the time that the far-infrared beam irradiating on the human body reach a presetting period of time, thereby achieving the purpose of energy conservation.

A medical device control unit is provided. The control unit may include a communications interface, a memory, and at least one processing device. The processing device may be configured to cause application of a control signal to a primary antenna associated with a unit external to a subject's body. The processing device may further be configured to monitor a feedback signal indicative of the subject's breathing and store, in the memory, information associated with the feedback signal. The processing device may also cause transmission of the stored information, via the communications interface, to a location remote from the control unit. The processing device may further be configured to receive an update signal, from the location remote from the control unit, and cause application of an updated control signal to the primary antenna based on the update signal.

A medical device control unit is provided. The control unit may include a communications interface, a memory, and at least one processing device. The processing device may be configured to cause application of a control signal to a primary antenna associated with a unit external to a subject's body. The processing device may further be configured to monitor a feedback signal indicative of the subject's breathing and store, in the memory, information associated with the feedback signal. The processing device may also cause transmission of the stored information, via the communications interface, to a location remote from the control unit. The processing device may further be configured to receive an update signal, from the location remote from the control unit, and cause application of an updated control signal to the primary antenna based on the update signal.

In one embodiment, a photoacoustic imaging system receives user input to specify one or more imaging wavelengths, and a target number of image frames to be taken of a target tissue region. The specified imaging wavelengths are set to capture at least two different photoabsorbing molecules in the target tissue. The photoacoustic imaging system takes image frames at the specified wavelengths, while the system also receives ECG and respiration data of the subject. Image frames are discarded based on the respiration data, and the other image frames are sorted into a plurality of slots corresponding to different points of the cardiac cycle from the ECG data. The system creates a composite image from the one or more wavelengths to show the target tissue of interest through the different points of the cardiac cycle.

A wearable device for continuous monitoring of the respiratory rate of a patient, using a first inertial sensor positioned on the abdomen, a second inertial sensor positioned on the thorax, and a third inertial sensor being positioned on a part of the body not subject to respiratory movements, fixed with respect to the torso. Each inertial sensor includes a microprocessor connected to a transmitter configured for processing the signals and supplying a signal represented by a quaternion that describes the orientation of the inertial sensors with respect to the Earth's reference system. A receiver is configured for receiving the abdominal quaternion of the first inertial sensor, the thoracic quaternion of the second inertial sensor, and the reference quaternion of the third inertial sensor and sending them to a control center configured for calculating the respiratory rate from the signals represented by a filtered abdominal quaternion and a filtered thoracic quaternion.

A method of monitoring a patient includes obtaining a first image of an object, obtaining a second image of the object, determining a level of similarity between the first and second images, obtaining a third image of the object, determining a level of similarity between the first and third images, analyzing a time series of values that includes the determined level of similarity between the first and second images and the determined level of similarity between the first and third images, and determining a state of the patient based at least on a result of the act of analyzing.

Radio frequency motion sensors may be configured for operation in a common vicinity so as to reduce interference. In some versions, interference may be reduced by timing and/or frequency synchronization. In some versions, a master radio frequency motion sensor may transmit a first radio frequency (RF) signal. A slave radio frequency motion sensor may determine a second radio frequency signal which minimizes interference with the first RF frequency. In some versions, interference may be reduced with additional transmission adjustments such as pulse width reduction or frequency and/or timing dithering differences. In some versions, apparatus may be configured with multiple sensors in a configuration to emit the radio frequency signals in different directions to mitigate interference between emitted pulses from the radio frequency motion sensors.

Radio frequency motion sensors may be configured for operation in a common vicinity so as to reduce interference. In some versions, interference may be reduced by timing and/or frequency synchronization. In some versions, a master radio frequency motion sensor may transmit a first radio frequency (RF) signal. A slave radio frequency motion sensor may determine a second radio frequency signal which minimizes interference with the first RF frequency. In some versions, interference may be reduced with additional transmission adjustments such as pulse width reduction or frequency and/or timing dithering differences. In some versions, apparatus may be configured with multiple sensors in a configuration to emit the radio frequency signals in different directions to mitigate interference between emitted pulses from the radio frequency motion sensors.