Patents by Inventor Steven E. Pav
Steven E. Pav 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).
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Publication number: 20140018651Abstract: Present embodiments include providing an initial estimate of a value representative of a blood flow characteristic at a current timestep, and determining a probability distribution of transition, wherein the probability distribution of transition includes potential values of the blood flow characteristic at the current timestep with associated probabilities of occurrence based solely on the initial estimate. Present embodiments further include obtaining an initial measurement of the blood flow characteristic, and determining a probability distribution of measured values, wherein the probability distribution of measured values includes potential values of the blood flow characteristic at the current timestep with associated probabilities of occurrence based on the initial measurement.Type: ApplicationFiled: September 17, 2013Publication date: January 16, 2014Applicant: Covidien LPInventor: Steven E. Pav
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Patent number: 8538500Abstract: Present embodiments include providing an initial estimate of a value representative of a blood flow characteristic at a current timestep, and determining a probability distribution of transition, wherein the probability distribution of transition includes potential values of the blood flow characteristic at the current timestep with associated probabilities of occurrence based solely on the initial estimate. Present embodiments further include obtaining an initial measurement of the blood flow characteristic, and determining a probability distribution of measured values, wherein the probability distribution of measured values includes potential values of the blood flow characteristic at the current timestep with associated probabilities of occurrence based on the initial measurement.Type: GrantFiled: October 20, 2011Date of Patent: September 17, 2013Assignee: Covidien LPInventor: Steven E. Pav
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Patent number: 8442608Abstract: There is disclosed a system and methods to estimate physiological parameters. In accordance with embodiments a method is disclosed which includes generating distribution data for a plurality of signals. The method may also include deconvolving one of the plurality of signals from the other plurality of signals to produce clean signals. The clean signals may then be used to calculate physiological parameters.Type: GrantFiled: December 24, 2008Date of Patent: May 14, 2013Assignee: Covidien LPInventor: Steven E. Pav
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Patent number: 8437822Abstract: There is provided a system and method for estimating blood analyte concentration using a non-invasive medical device. The method includes detecting light from a plurality of light sources and generating signals representative of observed absorption of the light from the plurality of light sources. Blood analyte concentrations are then estimated using support vector regression analysis.Type: GrantFiled: March 27, 2009Date of Patent: May 7, 2013Assignee: Covidien LPInventor: Steven E. Pav
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Patent number: 8292809Abstract: Embodiments disclosed herein may include methods and systems capable of estimating the underlying concentrations of chromophores in a sample. The photon scattering and absorption model may be based on Laplace and stable distributions, which may reveal that measurements in diffuse reflectance may follow a Beer-Lambert and Kohlrausch-Williams-Watts (KWW) product. This Beer-Lambert portion of the product may dominate in high absorption sample areas, while the KWW portion of the product may dominate in low absorption sample areas.Type: GrantFiled: March 27, 2009Date of Patent: October 23, 2012Assignee: Nellcor Puritan Bennett LLCInventor: Steven E Pav
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Publication number: 20120143026Abstract: Present embodiments include providing an initial estimate of a value representative of a blood flow characteristic at a current timestep, and determining a probability distribution of transition, wherein the probability distribution of transition includes potential values of the blood flow characteristic at the current timestep with associated probabilities of occurrence based solely on the initial estimate. Present embodiments further include obtaining an initial measurement of the blood flow characteristic, and determining a probability distribution of measured values, wherein the probability distribution of measured values includes potential values of the blood flow characteristic at the current timestep with associated probabilities of occurrence based on the initial measurement.Type: ApplicationFiled: October 20, 2011Publication date: June 7, 2012Applicant: NELLCOR PURITAN BENNETT INC.Inventor: Steven E. Pav
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Patent number: 8160668Abstract: A method of manufacturing a pulse oximeter configured to classify patient data is disclosed. The method includes collecting a set of sample data and classifying the sample data as either pathological or normal using human expertise. The method also includes generating statistics representative of the saturation traces. A linear discriminator is composed having a non-linear transform that accepts the statistics as input and a pulse oximeter is programmed to compute the linear discriminator using a kernel function.Type: GrantFiled: September 29, 2006Date of Patent: April 17, 2012Assignee: Nellcor Puritan Bennett LLCInventor: Steven E. Pav
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Patent number: 8140272Abstract: Systems and methods for unmixing spectroscopic data using nonnegative matrix factorization during spectrographic data processing are provided according to various embodiments. In an embodiment, a method of processing spectrographic data may include receiving optical absorbance data associated with a sample and iteratively computing values for component spectra using nonnegative matrix factorization. The values for component spectra may be iteratively computed until optical absorbance data is approximately equal to a Hadamard product of a pathlength matrix and a matrix product of a concentration matrix and a component spectra matrix. The method may also include iteratively computing values for pathlength using nonnegative matrix factorization, in which pathlength values may be iteratively computed until optical absorbance data is approximately equal to a Hadamard product of the pathlength matrix and the matrix product of the concentration matrix and the component spectra matrix.Type: GrantFiled: March 27, 2009Date of Patent: March 20, 2012Assignee: Nellcor Puritan Bennett LLCInventor: Steven E. Pav
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Patent number: 8112375Abstract: There is provided an optimization system and method for identifying useful channels. The method for selecting useful channels includes embedding a discrete predictor problem into continuous space of a predictor preweighting and executing an optimization algorithm to optimize a preweighting vector, wherein the optimization algorithm determines the relative importance of the each predictor. Also, the method includes constructing n different models, wherein a kth model comprises the k most important predictors and comparing the models using an information criterion to allow for automatic selection of a subset of the predictors. Additionally, an analytical Jacobian of the partial least squares regression vector is derived with respect to the predictor weighting to optimize the predictor weighting and select useful channels for use in the non-invasive medical device.Type: GrantFiled: March 27, 2009Date of Patent: February 7, 2012Assignee: Nellcor Puritan Bennett LLCInventor: Steven E. Pav
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Patent number: 8064975Abstract: Embodiments of the present invention relate to a method of estimating a blood flow characteristic in a patient. Present embodiments include providing a first probability distribution for an actual value of a function of the blood flow characteristic based on a previous value of the function, providing a second probability distribution describing a probability that observations of the blood flow characteristic were made given that the blood flow characteristic took a certain value, and combining the first and second probability distributions to facilitate selection of a most likely value of the function for posting as the value of the estimated blood flow characteristic.Type: GrantFiled: September 20, 2006Date of Patent: November 22, 2011Assignee: Nellcor Puritan Bennett LLCInventor: Steven E. Pav
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Patent number: 7848891Abstract: Embodiments of the present invention relate to a system and method for detecting a blood characteristic in a patient. Embodiments of the present invention may comprise detecting a first modulating signal at a first wavelength, detecting a second modulating signal at a second wavelength, and determining a relative amplitude of the first and second modulating signals. Further, embodiments of the present invention may comprise regressing the first and second modulating signals relative to one another, wherein a first uncertainty value in the first modulating signal and a second uncertainty value in the second modulating signal are accommodated.Type: GrantFiled: September 29, 2006Date of Patent: December 7, 2010Assignee: Nellcor Puritan Bennett LLCInventors: Paul D. Mannheimer, Steven E. Pav
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Publication number: 20090248320Abstract: Systems and methods for unmixing spectroscopic data using nonnegative matrix factorization during spectrographic data processing are provided according to various embodiments. In an embodiment, a method of processing spectrographic data may include receiving optical absorbance data associated with a sample and iteratively computing values for component spectra using nonnegative matrix factorization. The values for component spectra may be iteratively computed until optical absorbance data is approximately equal to a Hadamard product of a pathlength matrix and a matrix product of a concentration matrix and a component spectra matrix. The method may also include iteratively computing values for pathlength using nonnegative matrix factorization, in which pathlength values may be iteratively computed until optical absorbance data is approximately equal to a Hadamard product of the pathlength matrix and the matrix product of the concentration matrix and the component spectra matrix.Type: ApplicationFiled: March 27, 2009Publication date: October 1, 2009Applicant: Nellcor Puritan Benett LLCInventor: Steven E. Pav
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Publication number: 20090247845Abstract: There is provided a system and method for estimating blood analyte concentration using a non-invasive medical device. The method includes detecting light from a plurality of light sources and generating signals representative of observed absorption of the light from the plurality of light sources. Blood analyte concentrations are then estimated using support vector regression analysis.Type: ApplicationFiled: March 27, 2009Publication date: October 1, 2009Applicant: Nellcor Puritan Bennett LLCInventor: Steven E. Pav
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Publication number: 20090247083Abstract: There is provided an optimization system and method for identifying useful channels. The method for selecting useful channels includes embedding a discrete predictor problem into continuous space of a predictor preweighting and executing an optimization algorithm to optimize a preweighting vector, wherein the optimization algorithm determines the relative importance of the each predictor. Also, the method includes constructing n different models, wherein a kth model comprises the k most important predictors and comparing the models using an information criterion to allow for automatic selection of a subset of the predictors. Additionally, an analytical Jacobian of the partial least squares regression vector is derived with respect to the predictor weighting to optimize the predictor weighting and select useful channels for use in the non-invasive medical device.Type: ApplicationFiled: March 27, 2009Publication date: October 1, 2009Applicant: Nellcor Puritan Bennett LLCInventor: Steven E. Pav
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Publication number: 20090247844Abstract: Embodiments disclosed herein may include methods and systems capable of estimating the underlying concentrations of chromophores in a sample. The photon scattering and absorption model may be based on Laplace and stable distributions, which may reveal that measurements in diffuse reflectance may follow a Beer-Lambert and Kohlrausch-Williams-Watts (KWW) product. This Beer-Lambert portion of the product may dominate in high absorption sample areas, while the KWW portion of the product may dominate in low absorption sample areas.Type: ApplicationFiled: March 27, 2009Publication date: October 1, 2009Applicant: Nellcor Puritan Bennett LLCInventor: Steven E. Pav
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Publication number: 20090187085Abstract: There is disclosed a system and methods to estimate physiological parameters. In accordance with embodiments a method is disclosed which includes generating distribution data for a plurality of signals. The method may also include deconvolving one of the plurality of signals from the other plurality of signals to produce clean signals. The clean signals may then be used to calculate physiological parameters.Type: ApplicationFiled: December 24, 2008Publication date: July 23, 2009Applicant: Nellcor Puritan Bennett LLCInventor: Steven E. Pav
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Publication number: 20090171226Abstract: In embodiments, methods and systems are provided for the calculation of one or more indices representing variability in the timing of events in a signal representing a physiological parameter. In embodiments, the method and system may utilize an infinite impulse response formulation for the calculation of the indices to minimize memory and computational overhead, while additionally making the indices more responsive to newer measurements.Type: ApplicationFiled: December 22, 2008Publication date: July 2, 2009Applicant: Nellcor Puritan Bennett LLCInventors: Shannon E. Campbell, Steven E. Pav, Michael P. O'Neil
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Publication number: 20080081325Abstract: Embodiments of the present invention relate to a system and method for detecting a blood characteristic in a patient. Embodiments of the present invention may comprise detecting a first modulating signal at a first wavelength, detecting a second modulating signal at a second wavelength, and determining a relative amplitude of the first and second modulating signals. Further, embodiments of the present invention may comprise regressing the first and second modulating signals relative to one another, wherein a first uncertainty value in the first modulating signal and a second uncertainty value in the second modulating signal are accommodated.Type: ApplicationFiled: September 29, 2006Publication date: April 3, 2008Inventors: Paul D. Mannheimer, Steven E. Pav
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Publication number: 20080081974Abstract: A method of manufacturing a pulse oximeter configured to classify patient data is disclosed. The method includes collecting a set of sample data and classifying the sample data as either pathological or normal using human expertise. The method also includes generating statistics representative of the saturation traces. A linear discriminator is composed having a non-linear transform that accepts the statistics as input and a pulse oximeter is programmed to compute the linear discriminator using a kernel function.Type: ApplicationFiled: September 29, 2006Publication date: April 3, 2008Inventor: Steven E. Pav
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Publication number: 20080076986Abstract: Embodiments of the present invention relate to a method of estimating a blood flow characteristic in a patient. Present embodiments include providing a first probability distribution for an actual value of a function of the blood flow characteristic based on a previous value of the function, providing a second probability distribution describing a probability that observations of the blood flow characteristic were made given that the blood flow characteristic took a certain value, and combining the first and second probability distributions to facilitate selection of a most likely value of the function for posting as the value of the estimated blood flow characteristic.Type: ApplicationFiled: September 20, 2006Publication date: March 27, 2008Inventor: Steven E. Pav