Patent application number | Description | Published |
20090131770 | CONFORMABLE PHYSIOLOGICAL SENSOR - A sensor for measuring physiological characteristics includes a circuit assembly, at least one material layer, and an adhesive layer that extends beyond an outer edge of the circuit assembly. The at least one material layer forms an adhesive edge around the perimeter of the sensor. | 05-21-2009 |
20100087718 | 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. | 04-08-2010 |
20100140451 | PHYSIOLOGICAL SENSOR WITH BOOSTER CIRCUIT - A physiological sensor includes a light source in optical communication with a light detector. A controller is in communication with the light detector via a connector. A booster circuit is in communication with the light detector and the connector. The booster circuit may be configured to buffer signals generated by the light detector and reduce an input capacitance on either the controller or terminals of the connector. In various embodiments, the booster circuit may be disposed on the connector for a reusable cable or a disposable sensor pad. | 06-10-2010 |
20100145645 | SYSTEM AND METHOD OF DETERMINING LIGHT SOURCE AGING - A physiological sensor includes a light source and an age detector circuit in communication with the light source. The age detector circuit is configured to determine an age of the light source based on current-voltage characteristics of said light source. In addition, a method includes measuring an initial I-V characteristic and an actual I-V characteristic of the light source, and comparing the initial I-V characteristic to the actual I-V characteristic since changes in the I-V characteristics indicate aging. Actual I-V characteristics can be compared between light sources when they age at different rates to determine light source aging. Moreover, the method may include updating the memory device with the actual I-V characteristic at predetermined times. | 06-10-2010 |
20100177100 | SYSTEM AND METHOD FOR CUSTOMIZED DISPLAY OF PHYSIOLOGICAL PARAMETERS - A system includes a data repository on a bedside device, a networked device, or both, configured to receive at least one physiological parameter from each of a plurality of sources in a machine-dependent format and convert each physiological parameter received from the machine-dependent format into a machine-independent format. The bedside device is configured to display a graphical representation of at least one of the physiological parameters. The bedside device includes a graphical user interface configured to receive inputs from a user and customize the display of the physiological parameter based upon the inputs received from the user. | 07-15-2010 |
20100222654 | OPTICAL-BASED PHYSIOLOGICAL SENSOR ASSEMBLY WITH DISPOSABLE BARRIER LAYER - A physiological sensor assembly includes a physiological sensor having at least one light source and at least one optical receiver. A substantially transparent barrier layer is disposed between the physiological sensor and the patient's skin such that the barrier layer is removably adhered to the physiological sensor and removably adhered to the patient's skin. | 09-02-2010 |
20100292546 | BREATHABLE PHYSIOLOGICAL SENSOR - A sensor includes a sensor pad that allows air and moisture to diffuse from a patient's skin. A light source is disposed on the sensor pad is configured to generate near-infrared light. A light detector disposed on the sensor pad is configured to detect near-infrared light generated by the light source. | 11-18-2010 |
20100301215 | 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. | 12-02-2010 |
20110009721 | NEAR-INFRARED SPECTROSCOPY SENSOR WITH LIGHT SHEET - A sensor includes a sensor pad configured to be disposed on a portion of a patient's body. A light sheet is disposed on the sensor pad and has a first substrate and a second substrate spaced from one another. The light sheet further includes a light source configured to emit near-infrared light and a light detector configured to detect near-infrared light. The light source and the light detector are disposed between the substrates. The sensor pad is configured to allow light generated by the light source to travel through the portion of the patient's body to the light detector. The light received by the light detector is indicative of oxygen saturation of the portion of the patient's body through which the light travelled. | 01-13-2011 |
20110021893 | PHYSIOLOGICAL SENSOR HAVING A WAIST - An exemplary sensor includes a sensor pad having a first portion and a second portion separated by a waist portion. The waist portion is narrower than the first portion and the second portion. A light source that is disposed on the first portion is configured to generate near-infrared light and transmit the near-infrared light through part of a patient's body. A light detector that is disposed on the second portion is configured to detect near-infrared light that has traveled through the part of the patient's body. The near-infrared light detected indicates an amount of oxygen in the part of the patient's body through which the near-infrared light traveled. | 01-27-2011 |
20110021901 | PHYSIOLOGICAL SENSOR WITH OFFSET ADHESIVE LAYER - An exemplary sensor includes a sensor pad defining a perimeter, a light source, a light detector, and an adhesive layer. The light source is configured to generate near-infrared light and transmit the near-infrared light through part of a patient's body. The light detector is configured to receive the near-infrared light generated by the light source after it has traveled through part of the patient's body. The light received by the light detector indicates an amount of oxygen in the part of the patient's body through which the near-infrared light traveled. The adhesive layer is offset relative to the sensor pad to, for example, allow a clinician to easily remove the sensor from the patient. | 01-27-2011 |
20110105912 | CEREBRAL AUTOREGULATION INDICES - Monitoring cerebral autoregulation may include determining one or more autoregulation indices incorporating cerebral blood flow and blood pressure measurements and/or indices. Measurement techniques may be invasive or non-invasive. Various combinations of data, e.g., oximeter data, electrocardiogram data, blood pressure data, hemoglobin data, and heart rate data, may be used to create various indices. Many of the indices may be based on correlations of data. A display may indicate several of the indices. | 05-05-2011 |
20110208024 | SYSTEM AND METHOD OF RESOLVING OUTLIERS IN NIRS CEREBRAL OXIMETRY - A system and method for non-invasively estimating the tissue blood oxygen saturation level of a human subject, including so-called “outliers”, whose physiological make-up causes previously-known techniques to generate invalid tissue blood oxygen saturation estimations. The system includes a computing device and a sensor. The sensor includes a light source configured to emit light of at least four different wavelengths, one at a time. The sensor also includes two light detectors, each positioned a different distances from the light source. Optical density measurements are taken by the light detectors and provided to the computing device. A first tissue blood oxygen saturation value is computed using the optical density measurements associated with three of the four wavelengths, and a second tissue blood oxygen saturation value is computed using the optical density measurements associated with four of the wavelengths. The first and second tissue blood oxygen saturation values are compared, and the human subject is identified as an “outlier” based upon that comparison. | 08-25-2011 |
20110245639 | PHYSIOLOGICAL PARAMETER STATISTICAL PROCESSING AND DISPLAY - A patient monitoring system has a processor and a spectrophotometric sensor. The sensor is configured to be affixed to a patient to communicate signals associated with real time spectrophotometric measurements to the processor. The system further includes memory for storing data and computer instructions. The processor is configured to execute instructions stored in the memory to calculate a trend statistic based on a group of the signals received from the sensor. The processor is further configured to execute instructions stored in the memory to cause real time information associated with the spectrophotometric measurements and information associated with the trend statistic to be displayed on a visual user interface. | 10-06-2011 |
20120223213 | 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. | 09-06-2012 |
20130253292 | OPTICAL-BASED PHYSIOLOGICAL SENSOR ASSEMBLY WITH DISPOSABLE BARRIER LAYER - A physiological sensor assembly includes a physiological sensor having at least one light source and at least one optical receiver. A substantially transparent barrier layer is disposed between the physiological sensor and the patient's skin such that the barrier layer is removably adhered to the physiological sensor and removably adhered to the patient's skin. | 09-26-2013 |
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 |
20140081119 | BREATHABLE PHYSIOLOGICAL SENSOR - A sensor includes a sensor pad that allows air and moisture to diffuse from a patient's skin. A light source is disposed on the sensor pad is configured to generate near-infrared light. A light detector disposed on the sensor pad is configured to detect near-infrared light generated by the light source. | 03-20-2014 |
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 |
20140128698 | SYSTEM AND METHOD OF RESOLVING OUTLIERS IN NIRS CEREBRAL OXIMETRY - A system and method for non-invasively estimating the tissue blood oxygen saturation level of a human subject, including so-called “outliers”, whose physiological make-up causes previously-known techniques to generate invalid tissue blood oxygen saturation estimations. The system includes a computing device and a sensor. The sensor includes a light source configured to emit light of at least four different wavelengths, one at a time. The sensor also includes two light detectors, each positioned a different distances from the light source. Optical density measurements are taken by the light detectors and provided to the computing device. A first tissue blood oxygen saturation value is computed using the optical density measurements associated with three of the four wavelengths, and a second tissue blood oxygen saturation value is computed using the optical density measurements associated with four of the wavelengths. The first and second tissue blood oxygen saturation values are compared, and the human subject is identified as an “outlier” based upon that comparison. | 05-08-2014 |
20140187882 | PHYSIOLOGICAL SENSOR HAVING A WAIST - An exemplary sensor includes an integrated sensor pad having a first portion and a second portion separated by a waist portion. The waist portion is narrower than the first portion and the second portion. A light source that is disposed on the first portion is configured to generate near-infrared light and transmit the near-infrared light into a patient's body. A light detector that is disposed on the second portion is configured to detect near-infrared light that has traveled through part of the patient's body. | 07-03-2014 |