Patents by Inventor Justin Wolman
Justin Wolman 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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Patent number: 11554260Abstract: A method of responding to an adverse event associated with an implantable blood pump including detecting the adverse event, reducing a pump speed of the blood pump relative to a set pump speed in response to the detected adverse event, and determining whether at least one of a group consisting of the adverse event and a second adverse event is present following the reducing of the pump speed of the blood pump. If the at least one of the group consisting of the adverse event and a second adverse event is not present, the method includes increasing the pump speed to the set pump speed and if the at least one of the group consisting of the adverse event and a second adverse event is present while increasing the pump speed to the set pump speed, the method includes reducing the pump speed to a maximum safe operating speed.Type: GrantFiled: March 20, 2019Date of Patent: January 17, 2023Assignee: HeartWare, Inc.Inventors: Carlos Reyes, Katherine Chorpenning, Antonio Luiz Silva Ferreira, Neethu Lekshmi Vasudevan Jalaja, Justin Wolman, Fernando Casas
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Patent number: 11446481Abstract: A method of controlling an implantable blood pump including a housing having a proximal portion including an inlet, a distal portion including an outlet, and an impeller therein, the method including detecting when a pressure in the housing exceeds a pressure threshold and executing a first vector control command to displace the impeller axially in a distal direction from a primary position to a secondary position different than the primary position in response to the pressure exceeding the pressure threshold.Type: GrantFiled: May 7, 2019Date of Patent: September 20, 2022Assignee: HEARTWARE, INC.Inventors: Justin Wolman, Fernando Casas, Carlos Reyes, Thomas R. Johnson
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Publication number: 20220203083Abstract: A method of determining a heart rate of a patient having an implanted blood pump including applying a voltage to a plurality of coils of a stator of the blood pump to produce an electromagnetic force to rotate a rotor in communication with the plurality of coils; displaying a waveform associated with a back electromotive force in the plurality of coils of the blood pump, the waveform being proportional to an axial position of the rotor relative to the stator; determining a time interval between a first alteration in the waveform relative to a baseline and a second alteration in the waveform relative to the baseline; and determining the heart rate of the patient based on the time interval.Type: ApplicationFiled: March 14, 2022Publication date: June 30, 2022Inventors: Justin Wolman, Fernando Casas, Carlos Reyes
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Patent number: 11318295Abstract: A blood pump having a housing including an inlet element. The inlet element has a proximal portion sized to be received within at least a portion of a heart of a patient and defines a major longitudinal axis. A rotor is configured to rotate within the housing about the major longitudinal axis and impel blood from heart. At least one stator is disposed within the housing and positioned within the housing at least one from the group consisting of upstream and downstream from the rotor. During operation of the blood pump the rotor is maintained at an oblique angle with respect to the major longitudinal axis.Type: GrantFiled: January 31, 2020Date of Patent: May 3, 2022Assignee: HeartWare, Inc.Inventors: Carlos Reyes, Justin Wolman
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Patent number: 11311711Abstract: A method of controlling a blood pump including executing a control command to temporarily displace an impeller of the blood pump within a pump housing from a first axial position relative to the pump housing to a second axial position a distance away from the first axial position using a vector control method, and causing the impeller to move from the second axial position to a third axial position, the third axial position including a positive and a negative displacement of the impeller relative to the first axial position.Type: GrantFiled: January 29, 2019Date of Patent: April 26, 2022Assignee: HeartWare, Inc.Inventors: Fernando Casas, Carlos Reyes, Justin Wolman, Thomas R. Johnson
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Patent number: 11273299Abstract: A method of determining a heart rate of a patient having an implanted blood pump including applying a voltage to a plurality of coils of a stator of the blood pump to produce an electromagnetic force to rotate a rotor in communication with the plurality of coils; displaying a waveform associated with a back electromotive force in the plurality of coils of the blood pump, the waveform being proportional to an axial position of the rotor relative to the stator; determining a time interval between a first alteration in the waveform relative to a baseline and a second alteration in the waveform relative to the baseline; and determining the heart rate of the patient based on the time interval.Type: GrantFiled: December 17, 2018Date of Patent: March 15, 2022Assignee: HeartWare, Inc.Inventors: Justin Wolman, Fernando Casas, Carlos Reyes
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Patent number: 11154701Abstract: The present disclosure provides for methods and systems for determining heart rate of a patient. Based on motor current signals of a ventricular assist device (VAD), each of first, second and third events in the measured current signal may be detected, the first event being indicative of a rise or fall in the current signal, the second event being indicative of a rise or fall in the current signal in the opposite direction as the first event, and the third event being indicative of a rise or fall in the current signal in the same direction as the first event. A timer counter may be initiated upon detection of the first event, and an elapsed time may be measured upon detection of the third event. Heart rate may be determined based on the elapsed time of the timer counter.Type: GrantFiled: August 7, 2019Date of Patent: October 26, 2021Assignee: HeartWare, Inc.Inventors: Carlos Reyes, Fernando Casas, Justin Wolman
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Publication number: 20200345912Abstract: The present invention relates to kits and methods for calibrating a pump through performance of a thermal knockdown process including demagnetization of an impeller of the pump where the impeller is separate from the pump. By heat treating the impeller, a property of magnetic interaction of the pump is reduced in a repeatable manner. A kit includes a pump with impeller, a controller and an oven. The method generally involves an iterative process of testing the pump for a property related to magnetic interaction of the elements of the pump, removing the impeller from the pump, heating the impeller under controlled conditions, then placing the impeller back into the pump to repeat the test performed initially.Type: ApplicationFiled: July 8, 2020Publication date: November 5, 2020Inventors: Justin Wolman, Carlos Reyes, Fernando Casas
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Publication number: 20200276368Abstract: A blood pump having a housing including an inlet element. The inlet element has a proximal portion sized to be received within at least a portion of a heart of a patient and defines a major longitudinal axis. A rotor is configured to rotate within the housing about the major longitudinal axis and impel blood from heart. At least one stator is disposed within the housing and positioned within the housing at least one from the group consisting of upstream and downstream from the rotor. During operation of the blood pump the rotor is maintained at an oblique angle with respect to the major longitudinal axis.Type: ApplicationFiled: January 31, 2020Publication date: September 3, 2020Inventors: Carlos REYES, Justin WOLMAN
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Patent number: 10744247Abstract: The present invention relates to kits and methods for calibrating a pump through performance of a thermal knockdown process including demagnetization of an impeller of the pump where the impeller is separate from the pump. By heat treating the impeller, a property of magnetic interaction of the pump is reduced in a repeatable manner. A kit includes a pump with impeller, a controller and an oven. The method generally involves an iterative process of testing the pump for a property related to magnetic interaction of the elements of the pump, removing the impeller from the pump, heating the impeller under controlled conditions, then placing the impeller back into the pump to repeat the test performed initially.Type: GrantFiled: September 29, 2017Date of Patent: August 18, 2020Assignee: HeartWare, Inc.Inventors: Justin Wolman, Carlos Reyes, Fernando Casas
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Patent number: 10737006Abstract: A flow rate of blood through an implantable blood pump is determined based on a parameter related to the flow, such as a parameter related to thrust on the rotor of the pump. An amount of current supplied to the pump is used to determine each of a first flow rate value and second flow rate values. Each of the first and second flow rate values, in combination with the parameter related to thrust on the rotor of the pump, are used to calculate a flow rate of blood through the pump.Type: GrantFiled: September 7, 2018Date of Patent: August 11, 2020Assignee: HeartWare, Inc.Inventors: Fernando Casas, Justin Wolman, Carlos Reyes, Antonio Luiz Silva Ferreira
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Publication number: 20200086023Abstract: A method of starting an implantable blood pump including a first stator and a second stator, the method including detecting an electrical fault in one of a group consisting of the first stator and the second stator and commencing a startup of the first stator and the second stator in response to the electrical fault.Type: ApplicationFiled: August 27, 2019Publication date: March 19, 2020Inventors: Carlos REYES, Justin WOLMAN, Mark Steven EGLER
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Patent number: 10589011Abstract: A ventricular assist device includes a pump configured to pump blood of a patient. A motor is configured to operate the pump. First, second, and third conductors are coupled to the motor and are configured to supply electric current from a power supply to the motor in first, second, and third phases, respectively. A controller is configured to operate the motor using a Field Oriented Control (FOC) method, and if one from the group consisting of first, second and third conductors becomes unable to supply electric current to the motor, the controller continues to operate the motor using the FOC method using the phases of the two conductors that are able to supply electric current to the motor.Type: GrantFiled: September 20, 2017Date of Patent: March 17, 2020Assignee: HeartWare, Inc.Inventors: Fernando Casas, Carlos Reyes, Justin Wolman
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Publication number: 20190358383Abstract: The present disclosure provides for methods and systems for determining heart rate of a patient. Based on motor current signals of a ventricular assist device (VAD), each of first, second and third events in the measured current signal may be detected, the first event being indicative of a rise or fall in the current signal, the second event being indicative of a rise or fall in the current signal in the opposite direction as the first event, and the third event being indicative of a rise or fall in the current signal in the same direction as the first event. A timer counter may be initiated upon detection of the first event, and an elapsed time may be measured upon detection of the third event. Heart rate may be determined based on the elapsed time of the timer counter.Type: ApplicationFiled: August 7, 2019Publication date: November 28, 2019Inventors: Carlos REYES, Fernando CASAS, Justin WOLMAN
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Publication number: 20190343999Abstract: A method of controlling an implantable blood pump including a housing having a proximal portion including an inlet, a distal portion including an outlet, and an impeller therein, the method including detecting when a pressure in the housing exceeds a pressure threshold and executing a first vector control command to displace the impeller axially in a distal direction from a primary position to a secondary position different than the primary position in response to the pressure exceeding the pressure threshold.Type: ApplicationFiled: May 7, 2019Publication date: November 14, 2019Inventors: Justin WOLMAN, Fernando CASAS, Carlos REYES, Thomas R. JOHNSON
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Publication number: 20190307938Abstract: A method of responding to an adverse event associated with an implantable blood pump including detecting the adverse event, reducing a pump speed of the blood pump relative to a set pump speed in response to the detected adverse event, and determining whether at least one of a group consisting of the adverse event and a second adverse event is present following the reducing of the pump speed of the blood pump. If the at least one of the group consisting of the adverse event and a second adverse event is not present, the method includes increasing the pump speed to the set pump speed and if the at least one of the group consisting of the adverse event and a second adverse event is present while increasing the pump speed to the set pump speed, the method includes reducing the pump speed to a maximum safe operating speed.Type: ApplicationFiled: March 20, 2019Publication date: October 10, 2019Inventors: Carlos REYES, Katherine CHORPENNING, Antonio Luiz Silva FERREIRA, Neethu Lekshmi VASUDEVAN JALAJA, Justin WOLMAN, Fernando CASAS
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Patent number: 10420870Abstract: The present disclosure provides for methods and systems for determining heart rate of a patient. Based on motor current signals of a ventricular assist device (VAD), each of first, second and third events in the measured current signal may be detected, the first event being indicative of a rise or fall in the current signal, the second event being indicative of a rise or fall in the current signal in the opposite direction as the first event, and the third event being indicative of a rise or fall in the current signal in the same direction as the first event. A timer counter may be initiated upon detection of the first event, and an elapsed time may be measured upon detection of the third event. Heart rate may be determined based on the elapsed time of the timer counter.Type: GrantFiled: July 28, 2017Date of Patent: September 24, 2019Assignee: HeartWare, Inc.Inventors: Carlos Reyes, Fernando Casas, Justin Wolman
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Publication number: 20190231952Abstract: A method of controlling a blood pump including executing a control command to temporarily displace an impeller of the blood pump within a pump housing from a first axial position relative to the pump housing to a second axial position a distance away from the first axial position using a vector control method, and causing the impeller to move from the second axial position to a third axial position, the third axial position including a positive and a negative displacement of the impeller relative to the first axial position.Type: ApplicationFiled: January 29, 2019Publication date: August 1, 2019Inventors: Fernando CASAS, Carlos REYES, Justin WOLMAN, Thomas R. JOHNSON
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Publication number: 20190184082Abstract: A method of determining a heart rate of a patient having an implanted blood pump including applying a voltage to a plurality of coils of a stator of the blood pump to produce an electromagnetic force to rotate a rotor in communication with the plurality of coils; displaying a waveform associated with a back electromotive force in the plurality of coils of the blood pump, the waveform being proportional to an axial position of the rotor relative to the stator; determining a time interval between a first alteration in the waveform relative to a baseline and a second alteration in the waveform relative to the baseline; and determining the heart rate of the patient based on the time interval.Type: ApplicationFiled: December 17, 2018Publication date: June 20, 2019Inventors: Justin WOLMAN, Fernando CASAS, Carlos REYES
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Publication number: 20190001036Abstract: A flow rate of blood through an implantable blood pump is determined based on a parameter related to the flow, such as a parameter related to thrust on the rotor of the pump. An amount of current supplied to the pump is used to determine each of a first flow rate value and second flow rate values. Each of the first and second flow rate values, in combination with the parameter related to thrust on the rotor of the pump, are used to calculate a flow rate of blood through the pump.Type: ApplicationFiled: September 7, 2018Publication date: January 3, 2019Inventors: Fernando CASAS, Justin WOLMAN, Carlos REYES, Antonio Luiz Silva FERREIRA