Patents by Inventor Clark R. Baker

Clark R. Baker 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).

  • Patent number: 10532170
    Abstract: Embodiments disclosed herein may include systems and methods for determining a patient's respiratory effort and blood oxygen saturation based on data acquired from a pulse oximetry sensor and analyzing the parameters in conjunction with each other. For example, the respiratory effort may be determined based on a photo-plethysmographic waveform generated from light attenuation detected by the sensor, and the blood oxygen saturation may be a pulse-based estimate of arterial blood oxygen saturation determined from the detected attenuation. Analysis of the parameters may enable detection and classification of apnea (e.g., obstructive or central) or another underlying cause for respiratory instability. Furthermore, the measured respiratory effort may be compared to respiratory effort supplied by a ventilator to ensure proper sensor placement before enabling automatic adjustment of ventilator settings.
    Type: Grant
    Filed: May 18, 2015
    Date of Patent: January 14, 2020
    Assignee: COVIDIEN LP
    Inventors: Clark R. Baker, Jr., Michael P. O'Neil, Shannon E. Campbell, Gilbert Hausmann
  • Patent number: 10201302
    Abstract: Methods and systems are presented for determining whether a regional oximetry sensor is properly positioned on a subject. First and second metric values may be determined based on respective first and second light signals. The first and second metric values and a relationship between the first and second metrics are used to determine whether the sensor is properly positioned on the subject. The first and second metrics may form a pair of metrics, and whether the sensor is properly positioned on the subject may be determined based on whether the pair of metrics falls within a sensor-on region. In some embodiments, a plurality of metrics may be determined based on a plurality of received physiological signals. The plurality of metrics may be combined, using, for example, a neural network, to determine whether the regional oximetry sensor is properly positioned on a subject.
    Type: Grant
    Filed: January 10, 2018
    Date of Patent: February 12, 2019
    Assignee: Covidien LP
    Inventor: Clark R. Baker, Jr.
  • Patent number: 10022058
    Abstract: Embodiments of the present invention relate to a method for analyzing pulse data. In one embodiment, the method comprises receiving a signal containing data representing a plurality of pulses, the signal generated in response to detecting light scattered from blood perfused tissue. Further, one embodiment includes performing a pulse identification or qualification algorithm on at least a portion of the data, the pulse identification or qualification algorithm comprising at least one constant, and modifying the at least one constant based on results obtained from performing the pulse identification or qualification algorithm, wherein the results indicate that a designated number of rejected pulses has been reached.
    Type: Grant
    Filed: July 31, 2014
    Date of Patent: July 17, 2018
    Assignee: Covidien LP
    Inventor: Clark R. Baker, Jr.
  • Publication number: 20180146897
    Abstract: Methods and systems are presented for determining whether a regional oximetry sensor is properly positioned on a subject. First and second metric values may be determined based on respective first and second light signals. The first and second metric values and a relationship between the first and second metrics are used to determine whether the sensor is properly positioned on the subject. The first and second metrics may form a pair of metrics, and whether the sensor is properly positioned on the subject may be determined based on whether the pair of metrics falls within a sensor-on region. In some embodiments, a plurality of metrics may be determined based on a plurality of received physiological signals. The plurality of metrics may be combined, using, for example, a neural network, to determine whether the regional oximetry sensor is properly positioned on a subject.
    Type: Application
    Filed: January 10, 2018
    Publication date: May 31, 2018
    Inventor: Clark R. Baker, JR.
  • Patent number: 9895068
    Abstract: The present disclosure provides a system and method for determination and indication of the time remaining before a patient's physical characteristics are displayed on a monitor. The indication may be a numeric count-down, a progress bar, a clock face, an audible signal, or any other time and/or progress indication. The approximate wait-time may be determined, for example, by adding the known, generally fixed durations of characteristic determination processes to the calculated, variable durations of characteristic determination processes. Exemplary processes which may have generally fixed durations include monitor boot-up, sensor validation, and sensor calibration. Exemplary processes which may have variable durations include sensor location determination and pulsation detection. The sum of the pre-determined and calculated durations may be an approximate wait-time, which is indicated to a caregiver via visual or audible display.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: February 20, 2018
    Assignee: Covidien LP
    Inventors: Clark R. Baker, Daryl Bordon
  • Patent number: 9867561
    Abstract: Methods and systems are presented for determining whether a regional oximetry sensor is properly positioned on a subject. First and second metric values may be determined based on respective first and second light signals. The first and second metric values and a relationship between the first and second metrics are used to determine whether the sensor is properly positioned on the subject. The first and second metrics may form a pair of metrics, and whether the sensor is properly positioned on the subject may be determined based on whether the pair of metrics falls within a sensor-on region. In some embodiments, a plurality of metrics may be determined based on a plurality of received physiological signals. The plurality of metrics may be combined, using, for example, a neural network, to determine whether the regional oximetry sensor is properly positioned on a subject.
    Type: Grant
    Filed: January 26, 2015
    Date of Patent: January 16, 2018
    Assignee: Covidien LP
    Inventor: Clark R. Baker, Jr.
  • Patent number: 9820681
    Abstract: Embodiments disclosed herein may describe systems and methods for reducing nuisance alarms using probability and/or accuracy of a measured physiological parameter, such as the pulse rate or SpO2 measurement generated by a pulse oximeter. Embodiments may include methods for adjusting a predetermined alarm threshold based on the probability distribution of the estimated pulse rate and/or oxygen saturation of a patient's blood.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: November 21, 2017
    Assignee: Covidien LP
    Inventor: Clark R. Baker, Jr.
  • Patent number: 9801584
    Abstract: A method is provided for determining contact of a sensor with a patient's tissue. The method comprises comparing the intensity of detected light at a first wavelength to a threshold, wherein the first wavelength is not used to determine a physiological characteristic of the patient, and determining if the sensor is in contact with the patient's tissue based on the comparison. In addition, a method is provided for determining the amount of light shunting during operation of the sensor. The method comprises comparing the intensity of detected light at a first wavelength to a threshold, wherein the first wavelength is not used to determine a physiological characteristic of the patient, and determining the amount of light shunting based on the comparison.
    Type: Grant
    Filed: August 29, 2012
    Date of Patent: October 31, 2017
    Assignee: Covidien LP
    Inventor: Clark R. Baker, Jr.
  • Patent number: 9693736
    Abstract: A patient monitoring system may generate an autocorrelation sequence for a physiological signal such as a photoplethysmograph signal. A series of peak values may be identified for the autocorrelation sequence. The peak values may be modified based on a historical distribution of a physiological parameter. A physiological parameter such as respiration rate may be determined based on the modified peak values.
    Type: Grant
    Filed: November 30, 2011
    Date of Patent: July 4, 2017
    Assignee: Nellcor Puritan Bennett Ireland
    Inventors: Clark R. Baker, Jr., James Ochs, James H. Dripps, Paul S. Addison
  • Patent number: 9538961
    Abstract: A physiological monitoring system may use photonic signals to determine physiological parameters. The system may vary parameters of a light drive signal used to generate the photonic signal from a light source such that power consumption is reduced or optimized. Parameters may include light intensity, firing rate, duty cycle, other suitable parameters, or any combination thereof. In some embodiments, the system may use information from a first light source to generate a light drive signal for a second light source. In some embodiments, the system may vary parameters in a way substantially synchronous with physiological pulses, for example, cardiac pulses. In some embodiments, the system may vary parameters in response to an external trigger.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: January 10, 2017
    Assignee: Covidien LP
    Inventors: Daniel Lisogurski, Clark R. Baker, Jr.
  • Patent number: 9517018
    Abstract: A physiological monitoring system may use photonic signals to determine physiological parameters. The system may vary parameters of a light drive signal used to generate the photonic signal from a light source such that power consumption is reduced or optimized. Parameters may include light intensity, firing rate, duty cycle, other suitable parameters, or any combination thereof. In some embodiments, the system may use information from a first light source to generate a light drive signal for a second light source. In some embodiments, the system may vary parameters in a way substantially synchronous with physiological pulses, for example, cardiac pulses. In some embodiments, the system may vary parameters in response to an external trigger.
    Type: Grant
    Filed: January 25, 2016
    Date of Patent: December 13, 2016
    Assignee: COVIDIEN LP
    Inventors: Daniel Lisogurski, Clark R. Baker, Jr.
  • Patent number: 9433362
    Abstract: A monitoring system that may include an emission feature capable of emitting light into tissue, a modulator portion capable of modulating the emitter at a modulation frequency to generate photon density waves, a detection portion capable of detecting photons of the photon density waves after propagation through the tissue and capable of providing a distribution of detected photons over a time period for the photon density waves, and an analysis portion capable of calculating a skewness of the distribution and making determinations relating to a value of a physiologic parameter of the tissue based at least in part on the skewness of the distribution.
    Type: Grant
    Filed: February 12, 2013
    Date of Patent: September 6, 2016
    Assignee: Covidien LP
    Inventors: Clark R. Baker, Jr., Edward M. McKenna
  • Patent number: 9414769
    Abstract: The present disclosure relates, in some embodiments, to devices, systems, and/or methods for collecting, processing, and/or displaying stroke volume and/or cardiac output data. For example, a device for assessing changes in cardiac output and/or stroke volume of a subject receiving airway support may comprise a processor; an airway sensor in communication with the processor, wherein the airway sensor is configured and arranged to sense pressure in the subject's airway, lungs, and/or intrapleural space over time; a blood volume sensor in communication with the processor, wherein the blood volume sensor is configured and arranged to sense pulsatile volume of blood in a tissue of the subject over time; and a display configured and arranged to display a representative of an airway pressure, a pulsatile blood volume, a photoplethysmogram, a photoplethysmogram ratio, the determined cardiac output and/or stroke volume, or combinations thereof.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: August 16, 2016
    Assignee: COVIDIEN LP
    Inventors: Edward Karst, Joseph Douglas Vandine, Charles E. Porges, Clark R. Baker, Jr.
  • Patent number: 9411494
    Abstract: This disclosure describes systems and methods for reducing nuisance alarms associated with monitoring non-physiological parameters in a ventilatory system. Non-physiological parameters may include, but are not limited to, parameters that are internally monitored by the ventilator based on pre-configured ranges dictated by the manufacturer, by an applicable protocol, or by the clinician. Embodiments described herein seek to mitigate nuisance alarms by basing alarm conditions, at least in part, on an integral threshold such that an alarm is not generated when a monitored parameter briefly falls outside an acceptable range by a slight degree, but such that an alarm is generated when a monitored parameter falls outside an acceptable range by a more significant magnitude and/or duration.
    Type: Grant
    Filed: February 11, 2013
    Date of Patent: August 9, 2016
    Assignee: Covidien LP
    Inventor: Clark R. Baker, Jr.
  • Publication number: 20160206247
    Abstract: Systems, methods, apparatuses, and software for providing enhanced measurement and correction of physiological data are provided herein. In a first example, a physiological measurement system is configured to obtain a measured photoplethysmogram (PPG) for a patient, and obtain a reference signal for the patient measured concurrent with the measured PPG, the reference signal including noise components related to at least motion of the patient. The physiological measurement system also is configured to determine a filtered PPG from the measured PPG using at least an adaptive filter with the reference signal to reduce noise components of the measured PPG, determine a final PPG by spectrally subtracting at least a portion of the noise components of the reference signal from the filtered PPG, and identify one or more physiological metrics of the patient based on the final PPG.
    Type: Application
    Filed: January 15, 2016
    Publication date: July 21, 2016
    Inventors: Eric Morland, Clark R. Baker, JR., Daniel Lisogurski, Rasoul Yousefi, Philip Davis, Christopher J. Meehan
  • Publication number: 20160206245
    Abstract: Systems, methods, sensors, and software for providing enhanced measurement and correction of physiological data are provided herein. In one example, a capacitive sensor of a measurement system is positioned onto tissue of a patient. The capacitive sensor includes one or more conductive elements with associated gain properties that are positioned near optical sensor elements proximate to the tissue of the patient, the optical sensor elements positioned to measure a photoplethysmogram (PPG) for the tissue. The measurement system drives the capacitive sensor and measures capacitance signals associated with the capacitance sensor. The measurement system corrects for at least motion noise in the PPG using the capacitance signals.
    Type: Application
    Filed: January 15, 2016
    Publication date: July 21, 2016
    Inventors: Eric Morland, Christopher J. Meehan, Philip Davis, Tim Fries, Daniel Lisogurski, Clark R. Baker, JR., Rasoul Yousefi
  • Patent number: 9351674
    Abstract: Methods and systems for determining a physiological parameter in the presence of correlated artifact are provided. One method includes receiving two waveforms corresponding to two different wavelengths of light from a patient. Each of the two waveforms includes a correlated artifact. The method also includes combining the two waveforms to form a plurality of weighted difference waveforms, wherein the plurality of weighted difference waveforms vary from one another by a value of a multiplier. The method further includes identifying one of the weighted difference waveforms from the plurality of weighted difference waveforms using a characteristic of one or more of the plurality of weighted difference waveforms and determining a characteristic of the correlated artifact based at least in part on the identified weighted difference waveform.
    Type: Grant
    Filed: August 4, 2014
    Date of Patent: May 31, 2016
    Assignee: COVIDIEN LP
    Inventor: Clark R. Baker, Jr.
  • Publication number: 20160135692
    Abstract: A physiological monitoring system may use photonic signals to determine physiological parameters. The system may vary parameters of a light drive signal used to generate the photonic signal from a light source such that power consumption is reduced or optimized. Parameters may include light intensity, firing rate, duty cycle, other suitable parameters, or any combination thereof. In some embodiments, the system may use information from a first light source to generate a light drive signal for a second light source. In some embodiments, the system may vary parameters in a way substantially synchronous with physiological pulses, for example, cardiac pulses. In some embodiments, the system may vary parameters in response to an external trigger.
    Type: Application
    Filed: January 25, 2016
    Publication date: May 19, 2016
    Inventors: Daniel Lisogurski, Clark R. Baker, JR.
  • 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
  • Patent number: 9241643
    Abstract: A physiological monitoring system may use photonic signals to determine physiological parameters. The system may vary parameters of a light drive signal used to generate the photonic signal from a light source such that power consumption is reduced or optimized. Parameters may include light intensity, firing rate, duty cycle, other suitable parameters, or any combination thereof. In some embodiments, the system may use information from a first light source to generate a light drive signal for a second light source. In some embodiments, the system may vary parameters in a way substantially synchronous with physiological pulses, for example, cardiac pulses. In some embodiments, the system may vary parameters in response to an external trigger.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: January 26, 2016
    Assignee: Covidien LP
    Inventors: Daniel Lisogurski, Clark R. Baker, Jr.