Class / Patent application number | Description | Number of patent applications / Date published |
600536000 | Detector responsive to movement induced variation in impedance of body to electric current | 15 |
20080228097 | RESPIRATION MONITORING SYSTEM - The present invention provides a sleep respiration monitoring system for monitoring sleep quality of a user. The sleep respiration monitoring system has a sensing fabric, a detecting circuit and a judging and analysis circuit. The electrical characteristics of the sensing fabric vary with respiration status or extent of body movement of a user. The detecting circuit detects the electrical characteristics of the sensing fabric. The judging and analysis circuit performs signal processing, signal collection, signal classification and signal determination on output signals of the detecting circuit, so as to determine whether the user lies on the sensing fabric and the sleep quality of the user. | 09-18-2008 |
20100204601 | RESPIRATION TYPE EVALUATION APPARATUS - A respiration type evaluation apparatus includes a bioelectrical impedance determiner for determining a bioelectrical impedance at at least a body region of a human subject that contributes to respiration of the human subject, and a respiration type determiner for determining whether respiration of the human subject is abdominal or costal on the basis of change over time of the bioelectrical impedance determined by the bioelectrical impedance determiner. | 08-12-2010 |
20110224568 | Intubation monitoring apparatus and method - The invention comprises an apparatus and a method for externally assessing and monitoring placement of an endo-tracheal tube for ventilation of patients based on thoracic impedance measurement. | 09-15-2011 |
20110257553 | BODY-WORN MONITOR FOR MEASURING RESPIRATORY RATE - The invention provides a system for measuring respiratory rate (RR) from a patient. The system includes an impedance pneumography (IP) sensor, connected to at least two electrodes, and a processing system that receives and processes signals from the electrodes to measure an IP signal. A motion sensor (e.g. an accelerometer) measures at least one motion signal (e.g. an ACC waveform) describing movement of a portion of the patient's body to which it is attached. The processing system receives the IP and motion signals, and processes them to determine, respectfully, frequency-domain IP and motion spectra. Both spectra are then collectively processed to remove motion components from the IP spectrum and determine RR. For example, during the processing, an algorithm determines motion frequency components from the frequency-domain motion spectrum, and then using a digital filter removes these, or parameters calculated therefrom, from the IP spectrum. | 10-20-2011 |
20110257554 | BODY-WORN MONITOR FOR MEASURING RESPIRATORY RATE - The invention provides a system for measuring respiratory rate (RR) from a patient. The system includes an impedance pneumography (IP) sensor, connected to at least two electrodes, and a processing system that receives and processes signals from the electrodes to measure an IP signal. A motion sensor (e.g. an accelerometer) measures at least one motion signal (e.g. an ACC waveform) describing movement of a portion of the patient's body to which it is attached. The processing system receives the IP and motion signals, and processes them to determine, respectfully, frequency-domain IP and motion spectra. Both spectra are then collectively processed to remove motion components from the IP spectrum and determine RR. For example, during the processing, an algorithm determines motion frequency components from the frequency-domain motion spectrum, and then using a digital filter removes these, or parameters calculated therefrom, from the IP spectrum. | 10-20-2011 |
20120172742 | SYSTEMS AND METHODS FOR USING ELECTRICAL IMPEDANCE FOR NEURO CARDIAC THERAPY - A device embodiment is configured to deliver vagal stimulation therapy (VST) to a vagus nerve of a patient. The device embodiment includes a neural stimulator, an implantable impedance sensor and an impedance analyzer. The neural stimulator is configured to deliver the VST to the vagus nerve in a cervical region of the patient. The implantable impedance sensor is configured to detect impedance changes in a cervical region of the patient caused by laryngeal vibrations. The impedance sensor is configured to generate sensed impedance values. The impedance analyzer is configured to analyze the sensed impedance values generated by the sensor. The analyzer is configured to detect laryngeal vibrations or cough from the sensed impedance values. | 07-05-2012 |
20130281875 | DETERMINING RESPIRATORY RATE VIA IMPEDANCE PNEUMOGRAPHY - A method and system for determining a respiratory rate of a user are disclosed. The method comprises measuring a differential voltage across first and second electrodes of a sensor device coupled to the user. The method includes sampling the differential voltage using an analog-to-digital converter to produce an output signal. The method includes processing the output signal to detect a breath of the user based on a positive voltage transition through a midpoint, wherein the breath of the user is utilized to determine the respiratory rate of the user. | 10-24-2013 |
20140236037 | NECKLACE-SHAPED PHYSIOLOGICAL MONITOR - The invention provides a neck-worn sensor (referred to herein as the ‘necklace’) that is a single, body-worn system that measures the following parameters from an ambulatory patient: heart rate, pulse rate, pulse oximetry, respiratory rate, temperature, thoracic fluid levels, stroke volume, cardiac output, and a parameter sensitive to blood pressure called pulse transit time. From stroke volume, a first algorithm employing a linear model can estimate the patient's pulse pressure. And from pulse pressure and pulse transit time, a second algorithm, also employing a linear algorithm, can estimate systolic blood pressure and diastolic blood pressure. Thus, the necklace can measure all five vital signs along with hemodynamic parameters. It also includes a motion-detecting accelerometer, from which it can determine motion-related parameters such as posture, degree of motion, activity level, respiratory-induced heaving of the chest, and falls. | 08-21-2014 |
20140276175 | BODY-WORN MONITOR FOR MEASURING RESPIRATION RATE - The invention provides a multi-sensor system that uses an algorithm based on adaptive filtering to monitor a patient's respiratory rate. The system features an impedance pneumography sensor and a motion sensor (e.g., an accelerometer) configured to attach to the patient's torso and measure therefrom a motion signal. The system further comprises a processing system, configured to operably connect to the impedance pneumography sensor and motion sensor, and to determine a respiration rate value by applying filter parameters obtained from the impedance pneumography sensor signals to the motion sensor signals. | 09-18-2014 |
20140288455 | MULTI-FREQUENCY IMPEDANCE MONITORING SYSTEM - A system and method is provided to measure intrathoracic complex impedance and to identify and indicate disease conditions based on the impedance measurements. Multiple impedance vectors may be taken into account, and an optimal vector may be selected to provide the most useful impedance measurement for the identification and indication of disease conditions. | 09-25-2014 |
20140316295 | SENSORS FOR INDUCTIVE PLETHYSMOGRAPHIC MONITORING APPLICATIONS AND APPAREL USING THE SAME - This invention includes improved IP sensors that both have improved sensitivity, performance, and other properties and are multifunctional. The improved IP sensors have IP sensor conductors with waveforms having legs that are substantially parallel throughout the operating range of stretch. The multifunctional IP sensors include, in addition to IP sensors, accessory conductors, additional sensors, and other compatible modules. This inventions also includes embodiments of apparel incorporating the improved IP sensors. This apparel can range from band-like to shirt-like, and so forth, and include one or more IP sensors sensitive to expansions and contractions of underlying regions of a monitored subject. | 10-23-2014 |
20140343448 | TWO-ELECTRODE, IMPEDANCE-BASED RESPIRATION DETERMINATION - Methods, apparatuses and systems are described for determining respiration through impedance measurements using only two electrodes. A drive signal may be applied to a person, using only two electrodes. Using the same electrodes, the fluctuations in the voltage of the drive signal are determined. The voltage fluctuations in the drive signal are the result of impedance variations in the person's thoracic cavity due to respiration. Therefore, the voltage fluctuations may be used to determine a respiration rate of the person. In doing so, the voltage fluctuations may be digitized using a sampling rate that is much less than the frequency of the applied drive signal. | 11-20-2014 |
20140358021 | BIOIMPEDANCE SPECTROGRAPHY SYSTEM AND METHOD - A device and method for bioimpedance spectrography is corrected for breathing artefacts. A breathing signal is used in conjunction with the impedance signal to adjust for the time within the respiratory cycle at which the measurements are made. The correction allows the device to characterize tissue parameters accurately with fewer measurement points. | 12-04-2014 |
20160135715 | METHOD FOR RESPIRATORY MEASUREMENT - The invention is directed method for measuring respiration using impedance pneumography over a duration of at least several minutes, several hours or over the duration of night sleep, the method comprising: using at least one electrode ( | 05-19-2016 |
20160198979 | INDUCTIVE RESPIRATION SENSOR | 07-14-2016 |