Patents by Inventor Matthew Stowell
Matthew Stowell 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: 20230125353Abstract: A fluid detection system includes a fluid detection sensor disposed at a fluid sensing portion of the system, and a reference sensor disposed at a reference sensing portion of the system. The detection sensor and the reference sensor are subject to at least one common ambient environmental condition, such that the detection sensor exhibits an electrical characteristic that is different from an electrical characteristic of the reference sensor when fluid contacts the detection sensor. The fluid sensing portion may be within an internal fluid passage of a conduit that is removably couplable to a fluid device. Alternatively or additionally, the fluid sensing portion may be disposed in a fluid flow path, such as a leak path, in a permanent structure of a fluid device. The reference sensor may be disposed in a location away from and/or intentionally divided from the fluid flow path. The system may include a warning system.Type: ApplicationFiled: July 23, 2021Publication date: April 27, 2023Inventors: Daniel P. RAPIN, Matthew A. STOWELL
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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: 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: 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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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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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: 20120154789Abstract: 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: November 17, 2011Publication date: June 21, 2012Applicant: Fresenius Medical Care Holdings, Inc.Inventors: Louis L. Barrett, David W. Peterson, Matthew A. Stowell, Perry N. Law
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Publication number: 20120120384Abstract: 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: ApplicationFiled: February 18, 2011Publication date: May 17, 2012Applicant: HEMA METRICS, LLCInventors: Louis L. Barrett, David W. Peterson, N. Diane Hudkins, Matthew A. Stowell, Kristian A. Sammann, Benjamin D. Jensen, Douglas L. Cox, Perry N. Law, Ronald S. Glaittli
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Publication number: 20050213511Abstract: A system and method for gathering and reporting user and device activity data from wireless communication devices through a log file. The log file stores entries related to user events including the use of communications and applications, as well as access to local and remote media resource files. The log file entries may include parameters critical to mobile device operation such as location, signal quality, and battery power. The data gathering system comprises a plurality of wireless communications devices, each of which sends the log files through an available wireless communications system to a central facility for processing and aggregation into a database. Stored data is analyzed to generate, display, and marketing information that may include historical trends and projections of future consumer preferences and activities.Type: ApplicationFiled: March 24, 2005Publication date: September 29, 2005Applicant: MERLIN MOBILE MEDIAInventors: Richard Reece, Matthew Stowell