Patents by Inventor James Nicholas Watson

James Nicholas Watson 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: 20200022590
    Abstract: A PPG system for determining a stroke volume of a patient includes a PPG sensor configured to be secured to an anatomical portion of the patient. The PPG sensor is configured to sense a physiological characteristic of the patient. The PPG system may include a monitor operatively connected to the PPG sensor. The monitor receives a PPG signal from the PPG sensor. The monitor includes a pulse trending module determining a slope transit time of an upslope of a primary peak of the PPG signal. The pulse trending module determines a stroke volume of the patient as a function of the slope transit time.
    Type: Application
    Filed: September 30, 2019
    Publication date: January 23, 2020
    Inventors: Paul Stanley Addison, James Nicholas Watson
  • Patent number: 10463315
    Abstract: A technique for managing alarms includes acquiring a physiological parameter value and one or more alarm settings associated with the physiological parameter value. The technique also includes determining if the one or more alarm settings are associated with an adaptive alarm manager selecting an adaptive alarm condition from a plurality of adaptive alarm conditions when the one or more alarm settings are associated with the adaptive alarm manager; determining if the physiological parameter value meets the selected adaptive alarm condition; and generating an alarm in response when the physiological parameter value meets the selected adaptive alarm condition.
    Type: Grant
    Filed: November 20, 2015
    Date of Patent: November 5, 2019
    Assignee: Covidien LP
    Inventors: James Nicholas Watson, Paul S. Addison, Graeme A. Lyon
  • Patent number: 10448851
    Abstract: A PPG system for determining a stroke volume of a patient includes a PPG sensor configured to be secured to an anatomical portion of the patient. The PPG sensor is configured to sense a physiological characteristic of the patient. The PPG system may include a monitor operatively connected to the PPG sensor. The monitor receives a PPG signal from the PPG sensor. The monitor includes a pulse trending module determining a slope transit time of an upslope of a primary peak of the PPG signal. The pulse trending module determines a stroke volume of the patient as a function of the slope transit time.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: October 22, 2019
    Assignee: Covidien LP
    Inventors: Paul Stanley Addison, James Nicholas Watson
  • Patent number: 10265005
    Abstract: According to embodiments, techniques for using continuous wavelet transforms and spectral transforms to determine oxygen saturation from photoplethysmographic (PPG) signals are disclosed. According to embodiments, a first and a second PPG signals may be received. A spectral transform of the first and the second PPG signals may be performed to produce a first and a second spectral transformed signals. A frequency region associated with a pulse rate of the PPG signals may be identified from the first and the second spectral transformed signals. According to embodiments, a continuous wavelet transform of the first and the second PPG signals may be performed at a scale corresponding to the identified frequency region to produce a first and a second wavelet transformed signals. The oxygen saturation may be determined based at least in part upon the wavelet transformed signals.
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: April 23, 2019
    Assignee: NELLCOR PURITAN BENNETT IRELAND
    Inventors: James Nicholas Watson, Paul Stanley Addison
  • Patent number: 10182764
    Abstract: According to embodiments, a system for processing a physiological signals is disclosed. The system may comprise a sensor for generating the physiological signal. The system may comprise a processor configured to receive and process the physiological signal in order to improve interpretation and subsequent analysis of the physiological signal. The processor may be configured to generate a wavelet transform based on the physiological signal. The processor may be configured to determine phase values corresponding to the subject's respiration based on the wavelet transform. The processor may be configured to generate a sinusoidal waveform that is representative of the subject's breathing based on the phase values. The system may also comprise a display device configured to display the sinusoidal waveform.
    Type: Grant
    Filed: June 24, 2015
    Date of Patent: January 22, 2019
    Assignee: NELLCOR PURITAN BENNETT IRELAND
    Inventors: Paul Stanley Addison, James Nicholas Watson
  • Patent number: 9560995
    Abstract: A physiological monitoring system may determine a probe-off condition. A physiological sensor may receive a light signal including one or more wavelengths of light. The received light signal may be processed to obtain a light signal corresponding to an ambient light signal and a light signal corresponding to an emitted light signal and the ambient light signal. The signals may be analyzed to identify an inverse effect. The system may determine whether the physiological sensor is properly positioned based on the identification of an inverse effect.
    Type: Grant
    Filed: February 25, 2013
    Date of Patent: February 7, 2017
    Assignee: Covidien LP
    Inventors: Paul Stanley Addison, James Nicholas Watson
  • Patent number: 9554712
    Abstract: A test unit may generate a pulse signal based on a pulsatile profile and a frequency modulation component of a respiratory profile. A respiration modulated signal may be generated from the pulse signal, an amplitude modulation component, and a baseline modulation component. A patient modulated signal may be generated based on the respiration modulated signal and a patient profile. The artificial PPG signal may be generated based on the patient modulated signal and an artifact profile. The artificial PPG signal may be output to an electronic device.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: January 31, 2017
    Assignee: Covidien LP
    Inventors: Braddon M. Van Slyke, Ronald Kadlec, Scott McGonigle, Michael Mestek, Paul Stanley Addison, James Nicholas Watson
  • Publication number: 20160302737
    Abstract: Systems and methods for detecting the occurrence of events from a signal are provided. A signal processing system may analyze baseline changes and changes in signal characteristics to detect events from a signal. The system may also detect events by analyzing energy parameters and artifacts in a scalogram of the signal. Further, the system may detect events by analyzing both the signal and its corresponding scalogram.
    Type: Application
    Filed: June 24, 2016
    Publication date: October 20, 2016
    Inventors: James Nicholas Watson, Paul Stanley Addison
  • Patent number: 9462976
    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 16, 2014
    Date of Patent: October 11, 2016
    Assignee: Covidien LP
    Inventors: Paul Stanley Addison, James Nicholas Watson
  • Patent number: 9402573
    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: June 3, 2015
    Date of Patent: August 2, 2016
    Assignee: Covidien LP
    Inventors: Mark Su, James Nicholas Watson, Paul Stanley Addison
  • Patent number: 9378332
    Abstract: Systems and methods for detecting the occurrence of events from a signal are provided. A signal processing system may analyze baseline changes and changes in signal characteristics to detect events from a signal. The system may also detect events by analyzing energy parameters and artifacts in a scalogram of the signal. Further, the system may detect events by analyzing both the signal and its corresponding scalogram.
    Type: Grant
    Filed: September 6, 2013
    Date of Patent: June 28, 2016
    Assignee: Nellcor Puritan Bennett Ireland
    Inventors: James Nicholas Watson, Paul Stanley Addison
  • Patent number: 9357937
    Abstract: A system for determining stroke volume of an individual. The system includes a skew-determining module that is configured to calculate a first derivative of photoplethysmogram (PPG) signals of the individual. The first derivative forms a derivative waveform. The skew-determining module is configured to determine a skew metric of the first derivative, wherein the skew metric is indicative of a morphology of at least one pulse wave detected from blood flow of the individual in the derivative waveform. The system also includes an analysis module that is configured to determine a stroke volume of the individual. The stroke volume is a function of the skew metric of the first derivative.
    Type: Grant
    Filed: September 6, 2012
    Date of Patent: June 7, 2016
    Assignee: Covidien LP
    Inventors: James Nicholas Watson, Paul Stanley Addison
  • Publication number: 20160155309
    Abstract: A technique for managing alarms includes acquiring a physiological parameter value and one or more alarm settings associated with the physiological parameter value. The technique also includes determining if the one or more alarm settings are associated with an adaptive alarm manager selecting an adaptive alarm condition from a plurality of adaptive alarm conditions when the one or more alarm settings are associated with the adaptive alarm manager; determining if the physiological parameter value meets the selected adaptive alarm condition; and generating an alarm in response when the physiological parameter value meets the selected adaptive alarm condition.
    Type: Application
    Filed: November 20, 2015
    Publication date: June 2, 2016
    Inventors: James Nicholas Watson, Paul S. Addison, Graeme A. Lyon
  • Publication number: 20160106322
    Abstract: A PPG system for determining a stroke volume of a patient includes a PPG sensor configured to be secured to an anatomical portion of the patient. The PPG sensor is configured to sense a physiological characteristic of the patient. The PPG system may include a monitor operatively connected to the PPG sensor. The monitor receives a PPG signal from the PPG sensor. The monitor includes a pulse trending module determining a slope transit time of an upslope of a primary peak of the PPG signal. The pulse trending module determines a stroke volume of the patient as a function of the slope transit time.
    Type: Application
    Filed: December 21, 2015
    Publication date: April 21, 2016
    Inventors: Paul Stanley Addison, James Nicholas Watson
  • Patent number: 9314168
    Abstract: Techniques for detecting sleep events are disclosed. In some embodiments, a continuous non-invasive blood pressure (“CNIBP”) monitoring system may be used to obtain blood pressure values from a subject during a sleep study. Changes in the blood pressure over time may be determined and analyzed in order to identify a sleep event. The localized blood pressure changes may be interpreted in isolation or in combination with other signals collected from the subject.
    Type: Grant
    Filed: September 30, 2008
    Date of Patent: April 19, 2016
    Assignee: Nellcor Puritan Bennett Ireland
    Inventors: James Nicholas Watson, Rakesh Sethi, Paul Stanley Addison
  • Patent number: 9301697
    Abstract: Techniques for non-invasive blood pressure monitoring are disclosed. Data corresponding to a patient may be received from a hospital information system. The data may include, for example, drug administration data, medical procedure data, medical equipment data, or a combination thereof. Whether a blood pressure monitoring system needs to be recalibrated may be determined, based at least in part on the received data. If it is determined that the blood pressure monitoring system needs to be recalibrated, the recalibration may be performed and at least one blood pressure measurement of the patient may be computed using the recalibrated blood pressure monitoring system.
    Type: Grant
    Filed: September 30, 2008
    Date of Patent: April 5, 2016
    Assignee: Nellcor Puritan Bennett Ireland
    Inventors: Clark R. Baker, Jr., James Nicholas Watson, Paul Stanley Addison
  • Publication number: 20160073965
    Abstract: Methods and systems are provided for determining fluid responsiveness based on a physiological signal. The system may determine fluid responsiveness based on the physiological signal and receive or determine respiration information of the subject. The system may correct the fluid responsiveness based on the respiration information. In some embodiments, the system may determine a correction factor to correct the fluid responsiveness values based on a relationship between fluid responsiveness and the respiration information. In some embodiments, the system may correct the measured fluid responsiveness based on an error between the fluid responsiveness measure and another measure such as pulse pressure variation, where there is a relationship between the error and the respiration information.
    Type: Application
    Filed: September 4, 2015
    Publication date: March 17, 2016
    Inventors: Paul Stanley Addison, Scott McGonigle, James Nicholas Watson, Rui Wang, Peter Doyle
  • Patent number: 9259188
    Abstract: According to embodiments, systems and methods are provided for filtering a signal. A first reference signal may be generated according to a signal model and a second reference signal may be generated by analyzing a continuous wavelet transform of a signal. The first and second reference signals may then both be applied to an input signal to filter the input signal according to the components of both of the reference signals.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: February 16, 2016
    Assignee: Nellcor Puritan Bennett Ireland
    Inventors: James Nicholas Watson, Paul Stanley Addison
  • Patent number: 9241646
    Abstract: A PPG system for determining a stroke volume of a patient includes a PPG sensor configured to be secured to an anatomical portion of the patient. The PPG sensor is configured to sense a physiological characteristic of the patient. The PPG system may include a monitor operatively connected to the PPG sensor. The monitor receives a PPG signal from the PPG sensor. The monitor includes a pulse trending module determining a slope transit time of an upslope of a primary peak of the PPG signal. The pulse trending module determines a stroke volume of the patient as a function of the slope transit time.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: January 26, 2016
    Assignee: Covidien LP
    Inventors: Paul Stanley Addison, James Nicholas Watson
  • Patent number: 9236046
    Abstract: A sound signal from a patient may include information that may be used to determine multiple patient parameters. A patient monitor may determine respiration information such as respiration rate from the sound signal, for example based on modulations of the sound signal due to patient breathing. The patient monitor may also determine indications of patient distress based on a trained classifier, speech commands, or sound patterns.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: January 12, 2016
    Assignee: Covidien LP
    Inventors: James Nicholas Watson, Paul Stanley Addison