Patents Assigned to Nellcor Puritan Bennett
  • METHODS AND SYSTEMS FOR DETERMINING ALGORITHM SETTINGS BASED ON CLASSIFICATION INFORMATION
    Publication number: 20140073964
    Abstract: A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may determine a first metric value indicative of a physiological classification based on the physiological signal. An algorithm setting may be determined based on the physiological classification. The system may determine a second metric value indicative of a different physiological classification based on the physiological signal. A different algorithm may be determined based on the different physiological classification. The algorithm setting may, for example, affect the amount of filtering applied to the physiological signal.
    Type: Application
    Filed: September 11, 2012
    Publication date: March 13, 2014
    Applicant: NELLCOR PURITAN BENNETT LLC
    Inventors: Fernando Rodriguez-Llorente, Pirow Engelbrecht, Nicholas James Wooder
  • METHODS AND SYSTEMS FOR QUALIFYING PHYSIOLOGICAL VALUES BASED ON POSITIVE AND NEGATIVE VALUES
    Publication number: 20140073965
    Abstract: A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal.
    Type: Application
    Filed: September 11, 2012
    Publication date: March 13, 2014
    Applicant: NELLCOR PURITAN BENNETT LLC
    Inventors: Pirow Engelbrecht, Fernando Rodriguez-Llorente
  • METHODS AND SYSTEMS FOR DETERMINING AN ALGORITHM SETTING BASED ON A DIFFERENCE SIGNAL
    Publication number: 20140073871
    Abstract: A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may generate a difference signal based on the physiological signal and sort the difference signal to generate a sorted difference signal. The system may identify a midpoint of a first segment of the difference signal and a midpoint of a second segment of the difference signal. The first segment may correspond to positive values of the difference signal and the second segment may correspond to negative values of the difference signal. The system may determine an algorithm setting based on the first midpoint and the second midpoint. The algorithm setting may, for example, affect the amount of filtering applied to the physiological signal.
    Type: Application
    Filed: September 11, 2012
    Publication date: March 13, 2014
    Applicant: NELLCOR PURITAN BENNETT LLC
    Inventors: Fernando Rodriguez-Llorente, Pirow Engelbrecht, Nicholas James Wooder
  • METHODS AND SYSTEMS FOR DETERMINING PHYSIOLOGICAL INFORMATION BASED ON A CORRELATION MATRIX
    Publication number: 20140073939
    Abstract: A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may generate a lag matrix, which includes multiple segments of the physiological signal each having the same number of values. The system may generate a correlation matrix, which includes multiple correlation values, based on the lag matrix. The system may identify a peak in the correlation lag matrix, or a processed matrix derived thereof, and the corresponding lag value. The correlation matrix, or processed matrix thereof, may be rotated, averaged, or otherwise transformed by the system to identify the lag value. The system may determine physiological rate information based on the identified lag value.
    Type: Application
    Filed: September 11, 2012
    Publication date: March 13, 2014
    Applicant: NELLCOR PURITAN BENNETT LLC
    Inventors: Fernando Rodriguez-Llorente, Pirow Engelbrecht, Nicholas James Wooder
  • METHODS AND SYSTEMS FOR DETERMINING PHYSIOLOGICAL INFORMATION BASED ON A CROSS-CORRELATION WAVEFORM
    Publication number: 20140073866
    Abstract: A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal.
    Type: Application
    Filed: September 11, 2012
    Publication date: March 13, 2014
    Applicant: NELLCOR PURITAN BENNETT LLC
    Inventors: Pirow Engelbrecht, Fernando Rodriguez-Llorente, Nicholas James Wooder
  • METHODS AND SYSTEMS FOR ADJUSTING A CRITERION FOR QUALIFYING A CALCULATED VALUE
    Publication number: 20140073868
    Abstract: A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may receive a calculated value indicative of a physiological rate. The system may determine a value indicative of noise in the physiological signal and adjust at least one criterion for qualifying or disqualifying the calculated value based on the value indicative of noise. The criterion may, for example, be a threshold and the threshold may be adjusted based on the value indicative of noise. The system may qualify or disqualify the calculated value based on the at least one adjusted criterion.
    Type: Application
    Filed: September 11, 2012
    Publication date: March 13, 2014
    Applicant: Nellcor Puritan Bennett LLC
    Inventors: Fernando Rodriguez-Llorente, Pirow Engelbrecht, Nicholas James Wooder
  • METHODS AND SYSTEMS FOR DETERMINING PHYSIOLOGICAL INFORMATION BASED ON THE SHAPE OF AUTOCORRELATION PEAKS
    Publication number: 20140073953
    Abstract: A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal.
    Type: Application
    Filed: September 11, 2012
    Publication date: March 13, 2014
    Applicant: NELLCOR PURITAN BENNETT LLC
    Inventors: Pirow Engelbrecht, Fernando Rodriguez-Llorente, Nicholas James Wooder
  • METHODS AND SYSTEMS FOR CONDITIONING A PHYSIOLOGICAL SIGNAL USING AN ADJUSTABLE BANDPASS FILTER
    Publication number: 20140073952
    Abstract: A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may apply a bandpass filter to the physiological signal to assist in the determination of the physiological information. The system may determine a value indicative of a physiological rate and a metric based on the physiological signal. The system may select one or more settings, such as the center frequency and bandwidth, of the bandpass filter based on the rate and based on the metric, and apply the bandpass filter to the physiological signal.
    Type: Application
    Filed: September 11, 2012
    Publication date: March 13, 2014
    Applicant: NELLCOR PURITAN BENNETT LLC
    Inventors: Fernando Rodriguez-Llorente, Pirow Engelbrecht, Nicholas James Wooder
  • METHODS AND SYSTEMS FOR DETERMINING PHYSIOLOGICAL INFORMATION USING INITIALIZATION VALUES
    Publication number: 20140073958
    Abstract: A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may generate a window of data, and determine physiological information based on the window of data. The generated window of data may include one or more samples of physiological data, from the physiological signal, and one or more initialization values. The initialization values may include random numbers, noise values, sample values, scaled values thereof, or a combination thereof.
    Type: Application
    Filed: September 11, 2012
    Publication date: March 13, 2014
    Applicant: NELLCOR PURITAN BENNETT LLC
    Inventors: Fernando Rodriguez-Llorente, Pirow Engelbrecht, Nicholas James Wooder
  • METHODS AND SYSTEMS FOR QUALIFYING A CORRELATION LAG VALUE BASED ON A CORRELATION VALUE AT A DIFFERENT LAG
    Publication number: 20140073944
    Abstract: A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may generate a correlation sequence using two segments of the physiological signal. The system may determine a first correlation lag value that corresponds to a peak in the correlation sequence, and also determine a second correlation lag value equal to a fraction of the first correlation lag value. The fraction may be, for example, one half. The system may qualify or disqualify the correlation lag value based on the correlation value at the second lag value. The system may compare the correlation value at the second lag value to a threshold, to the correlation sequence at the first lag value, or both.
    Type: Application
    Filed: September 11, 2012
    Publication date: March 13, 2014
    Applicant: NELLCOR PURITAN BENNETT LLC
    Inventors: Fernando Rodriguez-Llorente, Pirow Engelbrecht, Nicholas James Wooder
  • METHODS AND SYSTEMS FOR DETERMINING PHYSIOLOGICAL INFORMATION BASED ON FAILURE INFORMATION
    Publication number: 20140073948
    Abstract: A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal.
    Type: Application
    Filed: September 11, 2012
    Publication date: March 13, 2014
    Applicant: NELLCOR PURITAN BENNETT LLC
    Inventors: Pirow Engelbrecht, Fernando Rodriguez-Llorente, Nicholas James Wooder
  • METHODS AND SYSTEMS FOR DETERMINING PHYSIOLOGICAL INFORMATION USING AUTOCORRELATION BASED ON A MODIFIED SIGNAL
    Publication number: 20140073878
    Abstract: A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal.
    Type: Application
    Filed: September 11, 2012
    Publication date: March 13, 2014
    Applicant: NELLCOR PURITAN BENNETT LLC
    Inventors: Pirow Engelbrecht, Fernando Rodriguez-Llorente, Nicholas James Wooder
  • METHODS AND SYSTEMS FOR QUALIFYING PHYSIOLOGICAL VALUES BASED ON CROSS-CORRELATIONS
    Publication number: 20140073876
    Abstract: A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal.
    Type: Application
    Filed: September 11, 2012
    Publication date: March 13, 2014
    Applicant: NELLCOR PURITAN BENNETT LLC
    Inventors: Fernando Rodriguez-Llorente, Nicholas James Wooder
  • METHODS AND SYSTEMS FOR CONDITIONING PHYSIOLOGICAL INFORMATION BASED ON A STABILITY FUNCTION
    Publication number: 20140073936
    Abstract: A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may condition the physiological signal to assist in the determination of the physiological information. The system may generate a signal based on a stability function applied to the physiological signal. The stability function may include a Lyapunov function. The system may generate a difference signal based on the stability function, and modify the physiological signal based on the difference signal. The modification may include reducing, or otherwise limiting, some differences between adjacent values in the physiological signal, removing portions of the physiological signal, or other modifications.
    Type: Application
    Filed: September 11, 2012
    Publication date: March 13, 2014
    Applicant: NELLCOR PURITAN BENNETT LLC
    Inventors: Fernando Rodriguez-Llorente, Pirow Engelbrecht, Nicholas James Wooder
  • METHODS AND SYSTEMS FOR QUALIFYING PHYSIOLOGICAL VALUES BASED ON METRICS
    Publication number: 20140073875
    Abstract: A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal.
    Type: Application
    Filed: September 11, 2012
    Publication date: March 13, 2014
    Applicant: NELLCOR PURITAN BENNETT LLC
    Inventors: Pirow Engelbrecht, Fernando Rodriguez-Llorente
  • SYSTEMS AND METHODS FOR DETERMINING FLUID RESPONSIVENESS
    Publication number: 20140073890
    Abstract: A system is provided including a respiratory detection module, a circulatory detection module, and an analysis module. The respiratory detection module is configured to detect respiratory information representative of respiration of a patient. The circulatory detection module configured to detect circulatory information representative of circulation of the patient. The analysis module is configured to obtain a respiratory waveform based at least in part on the respiratory information, obtain a circulatory waveform based at least in part on the circulatory information, combine the respiratory waveform and the circulatory waveform to provide a mixed waveform, and isolate a portion of the mixed waveform to identify a respiratory responsiveness waveform representative of an effect of the respiration of the patient on the mixed waveform.
    Type: Application
    Filed: September 12, 2012
    Publication date: March 13, 2014
    Applicant: Nellcor Puritan Bennett LLC
    Inventors: Mark Su, Bo Chen
  • METHODS AND SYSTEMS FOR DETERMINING NOISE INFORMATION FROM A PHYSIOLOGICAL SIGNAL
    Publication number: 20140073947
    Abstract: A physiological monitoring system may determine physiological information, such as physiological rate information, and other information, such as noise information, from a physiological signal. The system may generate a difference signal based on the physiological signal and sort the difference signal to generate a sorted difference signal. The system may identify one or more data points of the sorted difference signal as being associated with noise. For example, one or more end data points may be identified as being associated with noise based on a threshold. The system may determine a value indicative of noise based on the identified data points.
    Type: Application
    Filed: September 11, 2012
    Publication date: March 13, 2014
    Applicant: NELLCOR PURITAN BENNETT LLC.
    Inventors: Fernando Rodriguez-Llorente, Pirow Engelbrecht, Nicholas James Wooder
  • METHODS AND SYSTEMS FOR DETERMINING ALGORITHM SETTINGS FOR USE IN DETERMINING PHYSIOLOGICAL INFORMATION
    Publication number: 20140073966
    Abstract: A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal.
    Type: Application
    Filed: September 11, 2012
    Publication date: March 13, 2014
    Applicant: NELLCOR PURITAN BENNETT LLC
    Inventors: Pirow Engelbrecht, Fernando Rodriguez-Llorente, Nicholas James Wooder
  • METHODS AND SYSTEMS FOR DETERMINING PHYSIOLOGICAL INFORMATION BASED ON A CROSS-CORRELATION WAVEFORM
    Publication number: 20140073956
    Abstract: A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal.
    Type: Application
    Filed: September 11, 2012
    Publication date: March 13, 2014
    Applicant: NELLCOR PURITAN BENNETT LLC
    Inventors: Pirow Engelbrecht, Fernando Rodriguez-Llorente, Nicholas James Wooder
  • METHODS AND SYSTEMS FOR DETERMINING AN ALGORITHM SETTING BASED ON A DIFFERENCE SIGNAL
    Publication number: 20140073872
    Abstract: A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may generate a difference signal based on the physiological signal. The system may determine positive areas associated with positive regions of the difference signal and negative areas associated with negative regions of the difference signal. The system may determine area ratios based on adjacent positive and negative regions of the difference signal. The system may determine an algorithm setting based on the area ratios. The algorithm setting may, for example, affect the amount of filtering applied to the physiological signal.
    Type: Application
    Filed: September 11, 2012
    Publication date: March 13, 2014
    Applicant: NELLCOR PURITAN BENNETT LLC
    Inventors: Fernando Rodriguez-Llorente, Pirow Engelbrecht, Nicholas James Wooder