Class / Patent application number | Description | Number of patent applications / Date published |
600336000 | Detects constituents while excluding components (e.g., noise) | 13 |
20080281174 | System and method for a non-invasive medical sensor - A sensor is disclosed having one or more light sources, and one or more light detectors. At least one of the detectors produces an output in response to received light. Also, electrical circuitry in response to the output generates a pulse waveform proportional to the arterial and venous pulse of a human body, wherein the pulse waveform is used to synchronize an arterial-pulse measurement of the absorption or reflectance of one or more coherent light sources. | 11-13-2008 |
20090036762 | Pulse oximeter - In a pulse oximeter of the invention, an arterial blood oxygen saturation at least at a walking end point of time is stored in a storage, in response to a detection result from a detector for detecting whether a subject is walking. With use of the pulse oximeter, a measurement result on arterial blood oxygen saturation in association with walking can be automatically obtained, without the accompaniment of a laboratory technician or a like support. | 02-05-2009 |
20100125188 | MOTION CORRELATED PULSE OXIMETRY - A device includes a first sensor, a motion sensor, and a processor. The first sensor has an optical detector and an optical emitter. The optical detector generates a first output using the optical emitter. The first output corresponds to a physiological parameter of a user. The motion sensor generates a motion output corresponding to a detected motion of the user. The motion sensor is configured for attachment to the user. The processor is coupled to the first sensor by a first link and coupled to the motion sensor by a second link. At least one of the first link and the second link includes a wireless communication channel. The processor generates a processor output using the first output and the motion output. | 05-20-2010 |
20110071376 | Determination Of A Physiological Parameter - Methods and systems are provided for analyzing a physiological signal by applying a continuous wavelet transform on the signal and comparing the wavelet transformation to a library of wavelet signatures corresponding to one or more physiological conditions and/or patient conditions. A pulse oximeter system may relate the wavelet transformation with one or more of the wavelet signatures based on filters and/or thresholds, and may determine that the wavelet transformation indicates that the patient of the physiological signal has a physiological condition indicated by the related wavelet signature. In some embodiments, the pulse oximeter system may use previous analyses in a neural network to update the library. Further, non-physiological components of the wavelet transformation may also be identified and removed. | 03-24-2011 |
20110144462 | MINIATURIZED MULTI-SPECTRAL IMAGER FOR REAL-TIME TISSUE OXYGENATION MEASUREMENT - A portable multi-spectral imaging system and device is disclosed. The system includes at least one image acquisition device for acquiring an image from a subject, a filtering device to filter the light received by the image acquisition device, a processor for processing the image acquired by the image acquisition device, and a display. There is software running on the processor that determines oxygenation values of the subject based on the processed image. | 06-16-2011 |
20120296185 | SIGNAL ACQUISITION CIRCUIT FOR DETECTING A WANTED SIGNAL IN THE PRESENCE OF AN UNWANTED SIGNAL - A signal acquisition circuit detects a wanted signal in a composite signal containing the wanted signal and an unwanted signal, where the highest frequency in the unwanted signal is higher than the highest frequency in the wanted signal. A sensor captures the composite signal and an analog-to-digital converter samples and converts the composite signal to digital format, and a filter subtracts the unwanted signal from the composite signal. The sampled signal contains a first component containing the sum of the wanted signal and the unwanted signal sampled at a first rate at least equal to the Nyquist rate for the wanted signal but less than a second rate that is at least equal to the Nyquist rate for the unwanted signal, and a second component containing the unwanted signal sampled at the second rate. The analog-to-digital converter outputs to the filter a first digital signal containing the first component sampled at the first rate and a second digital signal containing the second component at the second rate. The circuit is useful for detecting a photoplethysmograph signal in the presence of ambient light in a pulse oximetry sensor. | 11-22-2012 |
20130217988 | MOTION COMPENSATION IN A SENSOR - A physiological sensor includes an emitter configured to transmit light and a detector configured to receive the transmitted light. The sensor also includes a first accelerometer disposed on a first portion of the sensor and a second accelerometer disposed on a second portion of the sensor, the second portion opposing the first portion. The first and second accelerometers are configured to measure a change in motion that corresponds to a change in distance between the detector and the emitter. | 08-22-2013 |
20130324817 | SYSTEMS AND METHODS FOR DETERMINING BLOOD OXYGEN SATURATION VALUES USING COMPLEX NUMBER ENCODING - The disclosure includes pulse oximetry systems and methods for determining point-by-point saturation values by encoding photoplethysmographs in the complex domain and processing the complex signals. The systems filter motion artifacts and other noise using a variety of techniques, including statistical analysis such as correlation, or phase filtering. | 12-05-2013 |
20130324818 | NON-INTERFERING PHYSIOLOGICAL SENSOR SYSTEM - A system includes a light source, a photodetector in optical communication with the light source, and a processor in communication with said photodetector and configured to output a signal representing oxygen saturation independent of an interfering signal from an interfering source. The system may further include an analog-to-digital converter in communication with the processor that is configured to digitize a signal from the photodetector by oversampling and output oversampling data to the processor. The processor may include an averaging filter that averages the oversampling data received from said analog-to-digital converter prior to decimation to generate an oversampling number. | 12-05-2013 |
20140121484 | PHYSIOLOGICAL SENSOR HAVING REDUCED SENSITIVITY TO INTERFERENCE - A physiological sensor having reduced sensitivity to interference includes a light source, a light detector in optical communication with the light source, and a sensor pad at least partially housing the light source and the light detector. The sensor pad is configured to be capacitively isolated from a patient. Moreover, the physiological sensor may be electrically connected to an amplifier having a signal ground and a monitor. | 05-01-2014 |
20140343385 | METHOD FOR ENHANCING PULSE OXIMETRY CALCULATIONS IN THE PRESENCE OF CORRELATED ARTIFACTS - Methods and systems for determining a physiological parameter in the presence of correlated artifact are provided. One method includes receiving two waveforms corresponding to two different wavelengths of light from a patient. Each of the two waveforms includes a correlated artifact. The method also includes combining the two waveforms to form a plurality of weighted difference waveforms, wherein the plurality of weighted difference waveforms vary from one another by a value of a multiplier. The method further includes identifying one of the weighted difference waveforms from the plurality of weighted difference waveforms using a characteristic of one or more of the plurality of weighted difference waveforms and determining a characteristic of the correlated artifact based at least in part on the identified weighted difference waveform. | 11-20-2014 |
20150094552 | HEALTH MONITORING SYSTEMS AND METHODS - Systems, methods and devices for reducing noise in health monitoring including monitoring systems, methods and/or devices receiving a health signal and/or having at least one electrode or sensor for health monitoring. | 04-02-2015 |
20150148637 | HEALTH MONITORING SYSTEMS AND METHODS - Systems, methods and devices for reducing noise in health monitoring including monitoring systems, methods and/or devices receiving a health signal and/or having at least one electrode or sensor for health monitoring. | 05-28-2015 |