Patents by Inventor Paul Stanley Addison

Paul Stanley Addison has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20150265196
    Abstract: A system is configured to determine a fluid responsiveness index of a patient from a physiological signal. The system may include a sensor configured to be secured to an anatomical portion of the patient, and a monitor operatively connected to the sensor. The sensor is configured to sense a physiological characteristic of the patient. The monitor is configured to receive a physiological signal from the sensor. The monitor may include an index-determining module configured to determine the fluid responsiveness index through formation of a ratio of one or both of amplitude or frequency modulation of the physiological signal to baseline modulation of the physiological signal.
    Type: Application
    Filed: June 3, 2015
    Publication date: September 24, 2015
    Inventors: Mark Su, James Nicholas Watson, Paul Stanley Addison
  • Patent number: 9138183
    Abstract: A combined physiological sensor and methods for detecting one or more physiological characteristics of a subject are provided. The combined sensor (e.g., a forehead sensor) may be used to detect and/or calculate at least one of a pulse blood oxygen saturation level, a regional blood oxygen saturation level, a respiration rate, blood pressure, an electrical physiological signal (EPS), a pulse transit time (PTT), body temperature associated with the subject, a depth of consciousness (DOC) measurement, any other suitable physiological parameter, and any suitable combination thereof. The combined sensor may include a variety of individual sensors, such as electrodes, optical detectors, optical emitters, temperature sensors, and/or other suitable sensors. The sensors may be advantageously positioned in accordance with a number of different geometries.
    Type: Grant
    Filed: February 3, 2011
    Date of Patent: September 22, 2015
    Assignee: Covidien LP
    Inventors: Edward M. McKenna, Bo Chen, Youzhi Li, Paul Stanley Addison
  • Patent number: 9113815
    Abstract: According to embodiments, systems, devices, and methods for ridge selection in scalograms are disclosed. Ridges or ridge components are features within a scalogram which may be computed from a signal such as a physiological (e.g., photoplethysmographic) signal. Ridges may be identified from one or more scalograms of the signal. Parameters characterizing these ridges may be determined. Based at least in part on these parameters, a ridge density distribution function is determined. A ridge is selected from analyzing this ridge density distribution function. In some embodiments, the selected ridge is used to determine a physiological parameter such as respiration rate.
    Type: Grant
    Filed: July 8, 2013
    Date of Patent: August 25, 2015
    Assignee: Nellcor Puritan Bennett Ireland
    Inventors: James Nicholas Watson, Paul Stanley Addison, David Clifton
  • Publication number: 20150208964
    Abstract: Systems and methods are provided for determining respiration information. Respiration information is determined from physiological signals responsive to regional oxygen saturation information. Respiration information is determined based on any of the amplitude, frequency, or baseline components of the physiological signals.
    Type: Application
    Filed: January 19, 2015
    Publication date: July 30, 2015
    Inventors: Paul Stanley Addison, James Nicholas Watson
  • Patent number: 9078609
    Abstract: The present disclosure relates to signal processing and, more particularly, to determining the value of a physiological parameter, such as the blood oxygen saturation (SpO2) of a subject. In an embodiment, a first baseline for a first waveform and a second baseline for a second waveform are determined. In this embodiment, the first and second waveforms are indicative of the physiological parameter of the subject. The first and second waveforms are filtered to obtain a first direct-current (DC) component for the first waveform and a second DC component for the second waveform. A measured value for the physiological parameter is derived from the first and second baseline signals, and the first and second DC components. In an embodiment, the measured value for the physiological parameter is determined based on a ratio of the normalized difference between the DC component and the baseline signal for the first waveform with respect to same for the second waveform.
    Type: Grant
    Filed: October 2, 2008
    Date of Patent: July 14, 2015
    Assignee: Nellcor Puritan Bennett Ireland
    Inventor: Paul Stanley Addison
  • Publication number: 20150190088
    Abstract: An apnea analysis system may include a photoplethysmographic (PPG) sub-system, a breath detection sub-system, and an apnea analysis module. An apnea analysis system includes a photoplethysmographic (PPG) sub-system, a breath detection sub-system, and an apnea analysis module. The PPG sub-system is configured to be operatively connected to an individual and output a PPG signal from the individual. The breath detection sub-system is configured to be operatively connected to the individual and output a breath signal from the individual. The apnea analysis module is in communication with the PPG sub-system and the breath detection sub-system. The apnea analysis module analyzes the breath signal and a respiratory component of the PPG signal and, based on the analysis, identifies a presence of apnea, differentiates between obstructive apnea and central apnea, and provides an indication of the identified apnea.
    Type: Application
    Filed: January 6, 2015
    Publication date: July 9, 2015
    Inventors: Bo Chen, Michael L. Mestek, Ron J. Kadlec, Niranjan Maharajh, Mark E. Kolnsberg, Corinne H. Johnson, James P. Ochs, Paul Stanley Addison, James N. Watson
  • Patent number: 9066660
    Abstract: According to embodiments, systems and methods for high-pass filtering a plethysmograph or photoplethysmograph (PPG) signal are disclosed. A sensor or probe may be used to obtain a plethysmograph or PPG signal from a subject. The sensor may be placed at any suitable location on the body, e.g., the forehead, finger, or toe. The PPG signal generated by the sensor may be high-pass filtered to disambiguate certain features of the PPG signal, including one or more characteristic points. The cut-off frequency for the high-pass filter may be greater than 0.75 Hz and less than 15 Hz. The cut-off frequency for the high-pass filter may be selected to be greater than the subject's computed pulse rate. These characteristic points on the filtered PPG signal may be used to compute non-invasive blood pressure measurements continuously or on a periodic basis. For example, the time difference between two or more characteristic points in a high-pass filtered version of the generated PPG signal may be computed.
    Type: Grant
    Filed: September 29, 2009
    Date of Patent: June 30, 2015
    Assignee: Nellcor Puritan Bennett Ireland
    Inventors: James N. Watson, Paul Stanley Addison
  • Patent number: 9066691
    Abstract: According to embodiments, systems and methods for generating reference signals are provided. A signal may be transformed using a continuous wavelet transform. Regions of interest may be selected from a transform or the resulting scalogram that may be used to generate a reference signal to use in filtering the signal or other signals. Cross-correlation techniques may be used to cancel noise components or isolate non-noise components from the signal. A physiological parameter may then be determined from the filtered signal or isolated components in the signal.
    Type: Grant
    Filed: October 3, 2008
    Date of Patent: June 30, 2015
    Assignee: Nellcor Puritan Bennett Ireland
    Inventors: Paul Stanley Addison, James Nicholas Watson
  • Patent number: 9060745
    Abstract: A system is configured to determine a fluid responsiveness index of a patient from a physiological signal. The system may include a sensor configured to be secured to an anatomical portion of the patient, and a monitor operatively connected to the sensor. The sensor is configured to sense a physiological characteristic of the patient. The monitor is configured to receive a physiological signal from the sensor. The monitor may include an index-determining module configured to determine the fluid responsiveness index through formation of a ratio of one or both of amplitude or frequency modulation of the physiological signal to baseline modulation of the physiological signal.
    Type: Grant
    Filed: August 22, 2012
    Date of Patent: June 23, 2015
    Assignee: Covidien LP
    Inventors: Mark Su, James Nicholas Watson, Paul Stanley Addison
  • Patent number: 9031627
    Abstract: According to embodiments, techniques for signal processing using multiple signals are disclosed. A first scalogram may be generated from a first signal and a second scalogram may be generated from a second signal. A modified or masked scalogram may then be generated based on the first and second scalograms. The modified scalogram may then be used to determine at least one physiological parameter. In some embodiments, one or both of the first signal and the second signal may be photoplethysmograph (PPG) signals obtained from a pulse oximeter.
    Type: Grant
    Filed: October 1, 2008
    Date of Patent: May 12, 2015
    Assignee: Nellcor Puritan Bennett Ireland
    Inventors: Paul Stanley Addison, James Nicholas Watson
  • Patent number: 9011347
    Abstract: One or more respiratory characteristics of a patient are measured by coupling patient monitor apparatus (e.g., a photoplethysmograph (“PPG”)) to the patient in order to produce a patient monitor signal that includes signal indicia indicative of effort the patient is exerting to breathe. A breathing or respiratory effort signal for the patient is extracted from the patient monitor signal. A respiratory characteristic signal is extracted (at least in part) from the effort signal. This may be done, for example, on the basis of an amplitude feature of the effort signal and a relative time of occurrence of that amplitude feature. Alternatively, the respiratory characteristic signal may be based on a relationship between two amplitude features of the effort signal, with or without regard for specifics of the times of occurrence of those amplitude features. A breath air flow meter may also be coupled to the patient, if desired, in order to produce a flow signal.
    Type: Grant
    Filed: July 2, 2009
    Date of Patent: April 21, 2015
    Assignee: Nellcor Puritan Bennett Ireland
    Inventors: Paul Stanley Addison, Andrew M. Cassidy, James N. Watson
  • Publication number: 20150103360
    Abstract: A physiological monitoring system may determine a probe-off condition. A physiological sensor may be used to emit one or more wavelengths of light. A received light signal may be processed to obtain a light signal corresponding to the emitted light and an ambient signal. The signals may be analyzed to identify similar behavior. The system may determine whether the physiological sensor is properly positioned based on the analysis.
    Type: Application
    Filed: December 16, 2014
    Publication date: April 16, 2015
    Inventors: Paul Stanley Addison, James Nicholas Watson
  • Patent number: 8986207
    Abstract: Systems and methods for determining physiological parameters of a subject using a sensor array. In an embodiment, a sensor array may contain sensor elements for determining multiple physiological parameters. A combination of sensor elements and the physiological parameters determined may be selected based on signals obtained from the sensor elements of the sensor array. A sensor array may be connected to a monitoring device that may select an optimal sensor element or combination of sensor elements and one or more physiological parameters to be determined. The monitoring device may then determine physiological parameters using the selected combination of sensor elements and display information associated with the parameters on a monitor for use, for example, in monitoring a medical patient.
    Type: Grant
    Filed: November 12, 2010
    Date of Patent: March 24, 2015
    Assignee: Covidien LP
    Inventors: Youzhi Li, Bo Chen, Edward M. McKenna, Paul Stanley Addison
  • Patent number: 8983588
    Abstract: A method of analysis of medical signals is presented which provides useful clinical information concerning the state of the myocardium during cardiopulmonary resuscitation (CPR). The analysis during CPR can be used to (i) identify the underlying rhythm, (ii) provide a measure of the efficacy of CPR, and (iii) to predict the outcome from a defibrillation shock.
    Type: Grant
    Filed: February 10, 2006
    Date of Patent: March 17, 2015
    Assignee: Cardiodigital Limited
    Inventors: Paul Stanley Addison, James Nicholas Watson
  • Publication number: 20150065829
    Abstract: According to embodiments, techniques for determining respiratory parameters are disclosed. More suitable probe locations for determining respiratory parameters, such as respiration rate and respiratory effort, may be identified. The most suitable probe location may be selected for probe placement. A scalogram may be generated from the detected signal at the more suitable location, resulting in an enhanced breathing band for determining respiratory parameters. Flexible probes that allow for a patient's natural movement due to respiration may also be used to enhance the breathing components of the detected signal. From the enhanced signal, more accurate and reliable respiratory parameters may be determined.
    Type: Application
    Filed: November 7, 2014
    Publication date: March 5, 2015
    Inventors: Paul Stanley Addison, James N. Watson, Scott McGonigle
  • Patent number: 8954127
    Abstract: According to embodiments, techniques for estimating scalogram energy values in a wedge region of a scalogram are disclosed. A pulse oximetry system including a sensor or probe may be used to receive a photoplethysmograph (PPG) signal from a patient or subject. A scalogram, corresponding to the obtained PPG signal, may be determined. In an arrangement, energy values in the wedge region of the scalogram may be estimated by calculating a set of estimation locations in the wedge region and estimating scalogram energy values at each location. In an arrangement, scalogram energy values may be estimated based on an estimation scheme and by combining scalogram values in a vicinity region. In an arrangement, the vicinity region may include energy values in a resolved region of the scalogram and previously estimated energy values in the wedge region of the scalogram. In an arrangement, one or more signal parameters may be determined based on the resolved and estimated values of the scalogram.
    Type: Grant
    Filed: December 22, 2012
    Date of Patent: February 10, 2015
    Assignee: Nellcor Puritan Bennett Ireland
    Inventors: James Nicholas Watson, Paul Stanley Addison, Braddon M. Van Slyke
  • Patent number: 8932219
    Abstract: Systems and methods are provided for monitoring a correlation between heart rate and blood pressure in a patient. When a characteristic of the correlation exceeds a threshold, a patient status indicator signal is sent to a monitoring device. In some embodiments, the patient status indicator signal indicates a particular medical condition or alerts a care provider to a change in status. In some embodiments, the heart rate signal is used to improve a blood pressure estimate generated by a different signal. In some embodiments, the heart rate, blood pressure and correlation signals are used in a predictive mathematical model to estimate patient status or outcome.
    Type: Grant
    Filed: June 20, 2012
    Date of Patent: January 13, 2015
    Assignee: Nellcor Puritan Bennett Ireland
    Inventors: Paul Stanley Addison, James Watson, Rakesh Sethi
  • Patent number: 8922788
    Abstract: A physiological monitoring system may determine a probe-off condition. A physiological sensor may be used to emit one or more wavelengths of light. A received light signal may be processed to obtain a light signal corresponding to the emitted light and an ambient signal. The signals may be analyzed to identify similar behavior. The system may determine whether the physiological sensor is properly positioned based on the analysis.
    Type: Grant
    Filed: December 22, 2012
    Date of Patent: December 30, 2014
    Assignee: Covidien LP
    Inventors: Paul Stanley Addison, James Nicholas Watson
  • Publication number: 20140364746
    Abstract: Systems and methods are provided for storing and recalling metrics associated with physiological signals. It may be determined that the value of a monitored physiological metric corresponds to a stored value. In such cases, a patient monitor may determine that a calibration is not desired. In some cases, a patient monitor may recall calibration parameters associated with the stored value if it determined that the stored value corresponds to the monitored metric value.
    Type: Application
    Filed: August 26, 2014
    Publication date: December 11, 2014
    Inventors: Paul Stanley Addison, James N. Watson
  • Patent number: 8898037
    Abstract: Methods and systems are provided for generating Lissajous figures based on monitored signals and identifying features of Lissajous figures. Features may include similarity metrics, shape change metrics and noise metrics, and may be used to determine information about the monitored signal. Features may also be used in monitoring operations, such as measurement quality assessment and recalibration.
    Type: Grant
    Filed: April 28, 2010
    Date of Patent: November 25, 2014
    Assignee: Nellcor Puritan Bennett Ireland
    Inventors: James N. Watson, Paul Stanley Addison