Patents by Inventor David W. Peterson
David W. Peterson 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: 20220218888Abstract: A circuit for measuring the conductivity of a medical fluid, the circuit comprising: a data collecting cell through which a medical fluid is configured to flow; an input voltage source that provides an input voltage to the data collecting cell; a voltage measurement unit configured to measure the input voltage and an output voltage of the data collecting cell; and a switch in communication with the voltage measurement unit, the switch configured to switch between a first state in which the voltage measurement unit is configured to measure the input voltage and a second state in which the voltage measurement unit is configured to measure the output voltage of the data collecting cell.Type: ApplicationFiled: December 8, 2021Publication date: July 14, 2022Inventors: Louis LeeGrande Barrett, Jon F. Moss, David W. Peterson, Ronald S. Glaittli
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Publication number: 20220104740Abstract: A hemodialysis patient data acquisition and management system resides on a host computer which receives information from one or more non-invasive, optical blood monitors associated with a hemodialysis system. When a patient is undergoing hemodialysis treatment, a sensor assembly monitors the patient's blood flowing through the hemodialysis system and a controller for the blood monitor generates data which includes at least an identification code for the patient undergoing the treatment on the respective system, and non-invasively determined blood data taken at the onset of the scheduled treatment, such as initial Hgb, HCT, and SAT values. A host computer communicates with the one or more optical blood monitors, preferably via a wireless network, and the patient's session commencement data is downloaded to the host computer.Type: ApplicationFiled: December 17, 2021Publication date: April 7, 2022Inventors: Louis LeeGrande Barrett, David W. Peterson, Brian H. Nathanson, Michael J. Germain, Michael K. Black
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Patent number: 11093668Abstract: A method includes, based on information received from a user through a graphical user interface, forming and storing elements that define a model that can be run by a computer to simulate operation of a real-world system that includes real-world features. The method includes including in the elements that are formed and stored, collections of software entities that correspond to the real-world features, and running the model using the software entities.Type: GrantFiled: January 24, 2019Date of Patent: August 17, 2021Assignee: Ventana Systems, Inc.Inventors: Larry F. Yeager, Thomas S. Fiddaman, David W. Peterson, Alan Karl Graham
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Patent number: 11013846Abstract: Systems and sensor clip assemblies for optically monitoring blood flowing through a blood chamber are provided. A sensor clip assembly includes emitters and photodetectors positioned on opposing arms, a signal conditioning circuit for conditioning raw analog signals generated by the photodetectors while the sensor clip assembly is fastened to a blood chamber, and an analog-to-digital converter for converting the conditioned analog signals to raw digital data. The sensor clip assembly may include a microcontroller for calculating parameters of blood flowing through the blood chamber such as hematocrit, oxygen saturation, and change in blood volume from the raw digital data. The sensor clip assembly is in communication with a networked computer, and the networked computer is in communication with a remote computer configured to provide a user interface for monitoring and/or controlling the sensor clip assembly.Type: GrantFiled: April 24, 2020Date of Patent: May 25, 2021Assignee: Fresenius Medical Care Holdings, Inc.Inventors: Louis LeeGrande Barrett, David W. Peterson, Matthew A. Stowell, Perry N. Law
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Publication number: 20200353150Abstract: Systems and sensor clip assemblies for optically monitoring blood flowing through a blood chamber are provided. A sensor clip assembly includes emitters and photodetectors positioned on opposing arms, a signal conditioning circuit for conditioning raw analog signals generated by the photodetectors while the sensor clip assembly is fastened to a blood chamber, and an analog-to-digital converter for converting the conditioned analog signals to raw digital data. The sensor clip assembly may include a microcontroller for calculating parameters of blood flowing through the blood chamber such as hematocrit, oxygen saturation, and change in blood volume from the raw digital data. The sensor clip assembly is in communication with a networked computer, and the networked computer is in communication with a remote computer configured to provide a user interface for monitoring and/or controlling the sensor clip assembly.Type: ApplicationFiled: April 24, 2020Publication date: November 12, 2020Inventors: Louis LeeGrande Barrett, David W. Peterson, Matthew A. Stowell, Perry N. Law
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Patent number: 10668204Abstract: Systems and sensor clip assemblies for optically monitoring blood flowing through a blood chamber are provided. A sensor clip assembly includes emitters and photodetectors positioned on opposing arms, a signal conditioning circuit for conditioning raw analog signals generated by the photodetectors while the sensor clip assembly is fastened to a blood chamber, and an analog-to-digital converter for converting the conditioned analog signals to raw digital data. The sensor clip assembly may include a microcontroller for calculating parameters of blood flowing through the blood chamber such as hematocrit, oxygen saturation, and change in blood volume from the raw digital data. The sensor clip assembly is in communication with a networked computer, and the networked computer is in communication with a remote computer configured to provide a user interface for monitoring and/or controlling the sensor clip assembly.Type: GrantFiled: August 19, 2019Date of Patent: June 2, 2020Assignee: Fresenius Medical Care Holdings, Inc.Inventors: Louis LeeGrande Barrett, David W. Peterson, Matthew A. Stowell, Perry N. Law
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Publication number: 20190365980Abstract: Systems and sensor clip assemblies for optically monitoring blood flowing through a blood chamber are provided. A sensor clip assembly includes emitters and photodetectors positioned on opposing arms, a signal conditioning circuit for conditioning raw analog signals generated by the photodetectors while the sensor clip assembly is fastened to a blood chamber, and an analog-to-digital converter for converting the conditioned analog signals to raw digital data. The sensor clip assembly may include a microcontroller for calculating parameters of blood flowing through the blood chamber such as hematocrit, oxygen saturation, and change in blood volume from the raw digital data. The sensor clip assembly is in communication with a networked computer, and the networked computer is in communication with a remote computer configured to provide a user interface for monitoring and/or controlling the sensor clip assembly.Type: ApplicationFiled: August 19, 2019Publication date: December 5, 2019Inventors: Louis LeeGrande Barrett, David W. Peterson, Matthew A. Stowell, Perry N. Law
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Patent number: 10471201Abstract: Systems and sensor clip assemblies for optically monitoring blood flowing through a blood chamber are provided. A sensor clip assembly includes emitters and photodetectors positioned on opposing arms, a signal conditioning circuit for conditioning raw analog signals generated by the photodetectors while the sensor clip assembly is fastened to a blood chamber, and an analog-to-digital converter for converting the conditioned analog signals to raw digital data. The sensor clip assembly may output the raw digital data to an external device and receive synchronized control signals from the external device, or the sensor clip assembly may include a microcontroller for performing calculations on the raw digital data and providing synchronized control signals internally. Parameters of blood flowing through the blood chamber such as hematocrit, oxygen saturation, and change in blood volume may be calculated from the raw digital data derived from the raw analog signals generated by the photodetectors.Type: GrantFiled: December 14, 2018Date of Patent: November 12, 2019Assignee: Fresenius Medical Care Holdings, Inc.Inventors: Louis LeeGrande Barrett, David W. Peterson, Matthew A. Stowell, Perry N. Law
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Publication number: 20190220556Abstract: A method includes, based on information received from a user through a graphical user interface, forming and storing elements that define a model that can be run by a computer to simulate operation of a real-world system that includes real-world features. The method includes including in the elements that are formed and stored, collections of software entities that correspond to the real-world features, and running the model using the software entities.Type: ApplicationFiled: January 24, 2019Publication date: July 18, 2019Inventors: Larry F. Yeager, Thomas S. Fiddaman, David W. Peterson, Alan Karl Graham
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Patent number: 10275545Abstract: A method includes, based on information received from a user through a graphical user interface, forming and storing elements that define a model that can be run by a computer to simulate operation of a real-world system that includes real-world features. The method includes including in the elements that are formed and stored, collections of software entities that correspond to the real-world features, and running the model using the software entities.Type: GrantFiled: March 15, 2013Date of Patent: April 30, 2019Assignee: Ventana Systems, Inc.Inventors: Larry F. Yeager, Thomas S. Fiddaman, David W. Peterson, Alan Karl Graham
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Publication number: 20190117871Abstract: Systems and sensor clip assemblies for optically monitoring blood flowing through a blood chamber are provided. A sensor clip assembly includes emitters and photodetectors positioned on opposing arms, a signal conditioning circuit for conditioning raw analog signals generated by the photodetectors while the sensor clip assembly is fastened to a blood chamber, and an analog-to-digital converter for converting the conditioned analog signals to raw digital data. The sensor clip assembly may output the raw digital data to an external device and receive synchronized control signals from the external device, or the sensor clip assembly may include a microcontroller for performing calculations on the raw digital data and providing synchronized control signals internally. Parameters of blood flowing through the blood chamber such as hematocrit, oxygen saturation, and change in blood volume may be calculated from the raw digital data derived from the raw analog signals generated by the photodetectors.Type: ApplicationFiled: December 14, 2018Publication date: April 25, 2019Inventors: Louis LeeGrande Barrett, David W. Peterson, Matthew A. Stowell, Perry N. Law
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Patent number: 10192005Abstract: A method includes, based on information received from a user through a graphical user interface, forming and storing elements that define a model that can be run by a computer to simulate operation of a real-world system that includes real-world features. The method includes including in the elements that are formed and stored, collections of software entities that correspond to the real-world features, and running the model using the software entities.Type: GrantFiled: March 15, 2013Date of Patent: January 29, 2019Assignee: Ventana Systems, Inc.Inventors: Larry F. Yeager, Thomas S. Fiddaman, David W. Peterson, Alan Karl Graham
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Patent number: 10179201Abstract: Systems and sensor clip assemblies for optically monitoring blood flowing through a blood chamber are provided. A sensor clip assembly includes emitters and photodetectors positioned on opposing arms, a signal conditioning circuit for conditioning raw analog signals generated by the photodetectors while the sensor clip assembly is fastened to a blood chamber, and an analog-to-digital converter for converting the conditioned analog signals to raw digital data. The sensor clip assembly may output the raw digital data to an external device and receive synchronized control signals from the external device, or the sensor clip assembly may include a microcontroller for performing calculations on the raw digital data and providing synchronized control signals internally. Parameters of blood flowing through the blood chamber such as hematocrit, oxygen saturation, and change in blood volume may be calculated from the raw digital data derived from the raw analog signals generated by the photodetectors.Type: GrantFiled: August 25, 2017Date of Patent: January 15, 2019Assignee: Fresenius Medical Care Holdings, Inc.Inventors: Louis L. Barrett, David W. Peterson, Matthew A. Stowell, Perry N. Law
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Patent number: 10117590Abstract: An embodiment of the disclosure provides a method for measuring change in blood volume using a transcutaneous measurement system applied to a patient's skin. The method involves placing a sensor in contact with the skin of a patient, where the sensor includes a light emitter and a photodetector. An intensity of light emanating from the light emitter is set and an initial intensity of light received at the photodetector is determined, where the light received at the photodetector has traveled through the patient's tissue. A later determination is then made of the intensity of the light received at the photodetector. A change in the blood volume is determined based on the intensity of the light emanating from the light emitter, the initial intensity of light received at the photodetector and the final intensity of light received at the photodetector.Type: GrantFiled: June 22, 2016Date of Patent: November 6, 2018Assignee: Fresenius Medical Care Holdings, Inc.Inventors: Louis L. Barrett, David W. Peterson, Peter Kotanko
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Publication number: 20170348473Abstract: Systems and sensor clip assemblies for optically monitoring blood flowing through a blood chamber are provided. A sensor clip assembly includes emitters and photodetectors positioned on opposing arms, a signal conditioning circuit for conditioning raw analog signals generated by the photodetectors while the sensor clip assembly is fastened to a blood chamber, and an analog-to-digital converter for converting the conditioned analog signals to raw digital data. The sensor clip assembly may output the raw digital data to an external device and receive synchronized control signals from the external device, or the sensor clip assembly may include a microcontroller for performing calculations on the raw digital data and providing synchronized control signals internally. Parameters of blood flowing through the blood chamber such as hematocrit, oxygen saturation, and change in blood volume may be calculated from the raw digital data derived from the raw analog signals generated by the photodetectors.Type: ApplicationFiled: August 25, 2017Publication date: December 7, 2017Inventors: Louis L. Barrett, David W. Peterson, Matthew A. Stowell, Perry N. Law
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Patent number: 9801993Abstract: Systems and sensor clip assemblies for optically monitoring blood flowing through a blood chamber are provided. A sensor clip assembly includes emitters and photodetectors positioned on opposing arms, a signal conditioning circuit for conditioning raw analog signals generated by the photodetectors while the sensor clip assembly is fastened to a blood chamber, and an analog-to-digital converter for converting the conditioned analog signals to raw digital data. The sensor clip assembly may output the raw digital data to an external device and receive synchronized control signals from the external device, or the sensor clip assembly may include a microcontroller for performing calculations on the raw digital data and providing synchronized control signals internally. Parameters of blood flowing through the blood chamber such as hematocrit, oxygen saturation, and change in blood volume may be calculated from the raw digital data derived from the raw analog signals generated by the photodetectors.Type: GrantFiled: November 17, 2011Date of Patent: October 31, 2017Assignee: Fresenius Medical Care Holdings, Inc.Inventors: Louis L. Barrett, David W. Peterson, Matthew A. Stowell, Perry N. Law
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Publication number: 20160367155Abstract: An embodiment of the disclosure provides a method for measuring change in blood volume using a transcutaneous measurement system applied to a patient's skin. The method involves placing a sensor in contact with the skin of a patient, where the sensor includes a light emitter and a photodetector. An intensity of light emanating from the light emitter is set and an initial intensity of light received at the photodetector is determined, where the light received at the photodetector has traveled through the patient's tissue. A later determination is then made of the intensity of the light received at the photodetector. A change in the blood volume is determined based on the intensity of the light emanating from the light emitter, the initial intensity of light received at the photodetector and the final intensity of light received at the photodetector.Type: ApplicationFiled: June 22, 2016Publication date: December 22, 2016Inventors: Louis L. Barrett, David W. Peterson, Peter Kotanko
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Publication number: 20160256090Abstract: A hemodialysis patient data acquisition and management system resides on a host computer which receives information from one or more non-invasive, optical blood monitors associated with a hemodialysis system. When a patient is undergoing hemodialysis treatment, a sensor assembly monitors the patient's blood flowing through the hemodialysis system and a controller for the blood monitor generates data which includes at least an identification code for the patient undergoing the treatment on the respective system, and non-invasively determined blood data taken at the onset of the scheduled treatment, such as initial Hgb, HCT, and SAT values. A host computer communicates with the one or more optical blood monitors, preferably via a wireless network, and the patient's session commencement data is downloaded to the host computer.Type: ApplicationFiled: May 18, 2016Publication date: September 8, 2016Inventors: Louis L. Barrett, David W. Peterson, Brian H. Nathanson, Michael J. Germain, Michael K. Black
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Patent number: 9173988Abstract: A sensor clip assembly for an optical blood monitoring system includes a circuit board with a microprocessor that is programmed with a ratiometric model to calculate hematocrit and/or oxygen saturation levels of a patient.Type: GrantFiled: February 18, 2011Date of Patent: November 3, 2015Assignee: FRESENIUS MEDICAL CARE HOLDINGS, INC.Inventors: Louis L. Barrett, David W. Peterson, N. Diane Hudkins, Matthew A. Stowell, Kristian A. Sammann, Bemjamin D. Jensen, Douglas L. Cox, Perry N. Law, Ronald S. Glaittli
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Publication number: 20140278294Abstract: A method includes, based on information received from a user through a graphical user interface, forming and storing elements that define a model that can be run by a computer to simulate operation of a real-world system that includes real-world features. The method includes including in the elements that are formed and stored, collections of software entities that correspond to the real-world features, and running the model using the software entities.Type: ApplicationFiled: March 15, 2013Publication date: September 18, 2014Applicant: Ventana Systems, Inc.Inventors: Larry F. Yeager, Thomas S. Fiddaman, David W. Peterson, Alan Karl Graham