Patents by Inventor KATHRYN B. FREDERICK
KATHRYN B. FREDERICK 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: 20230404421Abstract: The invention generally relates to heart pump systems. In some embodiments, a pressure sensor is provided with a heart pump, either at the inflow or the outflow of the blood pump. The heart pump may further include a flow estimator based on a rotor drive current signal delivered to the rotor. Based on the rotor drive current signal, a differential pressure across the pump may be calculated. The differential pressure in combination with the pressure measurements from the pressure sensor may be used to calculate pressure on the opposite side of the pump from the pressure sensor. In some embodiments, the pressure sensor is located at the outflow of the pump and the pump is coupled with the left ventricle. The differential pressure and pressure measurement may be used to calculate a left ventricular pressure waveform of the patient. With such a measurement, other physiological parameters may be derived.Type: ApplicationFiled: September 1, 2023Publication date: December 21, 2023Applicant: TC1 LLCInventors: Daniel I. Harjes, Kathryn B. Frederick, Eric Lee
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Patent number: 11779234Abstract: The invention generally relates to heart pump systems. In some embodiments, a pressure sensor is provided with a heart pump, either at the inflow or the outflow of the blood pump. The heart pump may further include a flow estimator based on a rotor drive current signal delivered to the rotor. Based on the rotor drive current signal, a differential pressure across the pump may be calculated. The differential pressure in combination with the pressure measurements from the pressure sensor may be used to calculate pressure on the opposite side of the pump from the pressure sensor. In some embodiments, the pressure sensor is located at the outflow of the pump and the pump is coupled with the left ventricle. The differential pressure and pressure measurement may be used to calculate a left ventricular pressure waveform of the patient. With such a measurement, other physiological parameters may be derived.Type: GrantFiled: September 22, 2020Date of Patent: October 10, 2023Assignee: TC1 LLCInventors: Daniel I. Harjes, Kathryn B. Frederick, Eric Lee
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Publication number: 20210001025Abstract: The invention generally relates to heart pump systems. In some embodiments, a pressure sensor is provided with a heart pump, either at the inflow or the outflow of the blood pump. The heart pump may further include a flow estimator based on a rotor drive current signal delivered to the rotor. Based on the rotor drive current signal, a differential pressure across the pump may be calculated. The differential pressure in combination with the pressure measurements from the pressure sensor may be used to calculate pressure on the opposite side of the pump from the pressure sensor. In some embodiments, the pressure sensor is located at the outflow of the pump and the pump is coupled with the left ventricle. The differential pressure and pressure measurement may be used to calculate a left ventricular pressure waveform of the patient. With such a measurement, other physiological parameters may be derived.Type: ApplicationFiled: September 22, 2020Publication date: January 7, 2021Applicant: TC1 LLCInventors: Daniel I. Harjes, Kathryn B. Frederick, Eric Lee
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Patent number: 10835654Abstract: The invention generally relates to heart pump systems. In some embodiments, a pressure sensor is provided with a heart pump, either at the inflow or the outflow of the blood pump. The heart pump may further include a flow estimator based on a rotor drive current signal delivered to the rotor. Based on the rotor drive current signal, a differential pressure across the pump may be calculated. The differential pressure in combination with the pressure measurements from the pressure sensor may be used to calculate pressure on the opposite side of the pump from the pressure sensor. In some embodiments, the pressure sensor is located at the outflow of the pump and the pump is coupled with the left ventricle. The differential pressure and pressure measurement may be used to calculate a left ventricular pressure waveform of the patient. With such a measurement, other physiological parameters may be derived.Type: GrantFiled: March 28, 2018Date of Patent: November 17, 2020Assignee: TC1 LLCInventors: Daniel I. Harjes, Kathryn B. Frederick, Eric Lee
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Publication number: 20180280601Abstract: The invention generally relates to heart pump systems. In some embodiments, a pressure sensor is provided with a heart pump, either at the inflow or the outflow of the blood pump. The heart pump may further include a flow estimator based on a rotor drive current signal delivered to the rotor. Based on the rotor drive current signal, a differential pressure across the pump may be calculated. The differential pressure in combination with the pressure measurements from the pressure sensor may be used to calculate pressure on the opposite side of the pump from the pressure sensor. In some embodiments, the pressure sensor is located at the outflow of the pump and the pump is coupled with the left ventricle. The differential pressure and pressure measurement may be used to calculate a left ventricular pressure waveform of the patient. With such a measurement, other physiological parameters may be derived.Type: ApplicationFiled: March 28, 2018Publication date: October 4, 2018Inventors: Daniel I. Harjes, Kathryn B. Frederick, Eric Lee
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Patent number: 9526818Abstract: A protective cap for fluidly sealing a connector of a cable is provided. The protective cap includes a flexible body having an interior cavity with a distal opening through which the connector is inserted. The distal opening is defined by an annular ridge that engages a cable portion proximal the connector to fluidly seal the entire connector within the cavity. The body portion may have an oval-shaped cross-section while the interior cavity is cylindrical so that the portions wider portions of the body provide longitudinal rigidity to facilitate installation and removal of the cap by a manual pushing and pulling. A tether may be included to attach the cap to a distal portion of the cable. The protective cap and tether may be integrally formed of a soft, highly flexible material to improve ease of use, biocompatibility and patient comfort.Type: GrantFiled: April 15, 2015Date of Patent: December 27, 2016Assignee: THORATEC CORPORATIONInventors: Keith Hamilton Kearsley, Gabe Wegel, Kathryn B. Frederick, Julien Duhamel, Brian Barber
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Publication number: 20150290377Abstract: A protective cap for fluidly sealing a connector of a cable is provided. The protective cap includes a flexible body having an interior cavity with a distal opening through which the connector is inserted. The distal opening is defined by an annular ridge that engages a cable portion proximal the connector to fluidly seal the entire connector within the cavity. The body portion may have an oval-shaped cross-section while the interior cavity is cylindrical so that the portions wider portions of the body provide longitudinal rigidity to facilitate installation and removal of the cap by a manual pushing and pulling. A tether may be included to attach the cap to a distal portion of the cable. The protective cap and tether may be integrally formed of a soft, highly flexible material to improve ease of use, biocompatibility and patient comfort.Type: ApplicationFiled: April 15, 2015Publication date: October 15, 2015Applicant: THORATEC CORPORATIONInventors: KEITH HAMILTON KEARSLEY, GABE WEGEL, KATHRYN B. FREDERICK, JULIEN DUHAMEL, BRIAN BARBER