Patents by Inventor Steven N. Lu
Steven N. Lu 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: 8798723Abstract: An implantable medical device monitors ST segment data collected from EGM. ST trends are established and monitored over time. The IMD is able to discern whether the data indicate supply ischemia, demand ischemia, or other physiological causes. The IMD is then able to provide appropriate information and alerts.Type: GrantFiled: January 31, 2007Date of Patent: August 5, 2014Assignee: Medtronic, Inc.Inventors: Zhendong Song, Steven N. Lu
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Patent number: 8620416Abstract: An implantable medical device monitors ST segment data collected from EGM. ST trends are established and monitored over time. The IMD is able to discern whether the data indicate supply ischemia, demand ischemia, or other physiological causes. The IMD is then able to provide appropriate information and alerts.Type: GrantFiled: January 18, 2011Date of Patent: December 31, 2013Assignee: Medtronic, Inc.Inventors: Zhendong Song, Steven N. Lu, Shailesh K. V. Musley, Eduardo N. Warman
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Patent number: 8224447Abstract: A system, comprising a sterilizable package; an implantable medical device placed inside the sterilizable package; and an electrical interface electrically coupled to the implantable medical device and extending from inside the sterilizable package to outside the sterilizable package. In various embodiments, the interface may include package contacts electrically coupled to electrode terminals on the implantable medical device, patient terminals and conductors extending between the package contacts and the patient terminals.Type: GrantFiled: November 30, 2005Date of Patent: July 17, 2012Assignee: Medtronic, Inc.Inventors: William K. Wenger, Paul G. Krause, William J. Plombon, Steven N. Lu, Sean B. McAdams, Brian B. Lee, Lee Stylos, Judy B. Salzer, G. Jordan Montgomery
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Patent number: 8219200Abstract: A system, comprising a sterilizable package; an implantable medical device placed inside the sterilizable package; and an electrical interface electrically coupled to the implantable medical device and extending from inside the sterilizable package to outside the sterilizable package. In various embodiments, the interface may include package contacts electrically coupled to electrode terminals on the implantable medical device, patient terminals and conductors extending between the package contacts and the patient terminals.Type: GrantFiled: June 29, 2010Date of Patent: July 10, 2012Assignee: Medtronic, Inc.Inventors: William K. Wenger, Paul G. Krause, William J. Plombon, Steven N. Lu, Sean B. McAdams, Brian B. Lee, Lee Stylos, Judy B. Salzer, G. Jordan Montgomery
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Patent number: 7996084Abstract: An implantable medical device (IMD) performs periodic testing of a patient to determine ischemia threshold information. At selected times while the patient is at rest, the IMD increases the pacing rate over time until it receives feedback either from the patient or from an ischemia sensor. The IMD determines the threshold based upon the pacing rate at the time when the feedback was received. The threshold information can be used to adjust the upper pacing rate that can be used during rate adaptive pacing, to determine the effects of drug therapy, and to provide a general indication of the state of coronary artery disease in the patient. The periodic increase of pacing rate to the ischemic zone also provides a preconditioning of the myocardium to allow the patient greater exercise benefit without angina.Type: GrantFiled: April 19, 2006Date of Patent: August 9, 2011Assignee: Medtronic, Inc.Inventors: Lee Stylos, Todd J. Sheldon, Steven N. Lu, William J. Combs, Robert J. Nehls
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Publication number: 20110112422Abstract: An implantable medical device monitors ST segment data collected from EGM. ST trends are established and monitored over time. The IMD is able to discern whether the data indicate supply ischemia, demand ischemia, or other physiological causes. The IMD is then able to provide appropriate information and alerts.Type: ApplicationFiled: January 18, 2011Publication date: May 12, 2011Applicant: MEDTRONIC, INC.Inventors: Zhendong Song, Steven N. Lu, Shailesh K.V. Musley, Eduardo N. Warman
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Patent number: 7894884Abstract: An implantable medical device monitors ST segment data collected from EGM. ST trends are established and monitored over time. The IMD is able to discern whether the data indicate supply ischemia, demand ischemia, or other physiological causes. The IMD is then able to provide appropriate information and alerts.Type: GrantFiled: January 31, 2007Date of Patent: February 22, 2011Assignee: Medtronic, Inc.Inventors: Zhendong Song, Steven N. Lu, Shailesh K. V. Musley, Eduardo N. Warman
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Publication number: 20110004265Abstract: A system, comprising a sterilizable package; an implantable medical device placed inside the sterilizable package; and an electrical interface electrically coupled to the implantable medical device and extending from inside the sterilizable package to outside the sterilizable package. In various embodiments, the interface may include package contacts electrically coupled to electrode terminals on the implantable medical device, patient terminals and conductors extending between the package contacts and the patient terminals.Type: ApplicationFiled: June 29, 2010Publication date: January 6, 2011Applicant: Medtronic, Inc.Inventors: William K. Wenger, Paul G. Krause, William J. Plombon, Steven N. Lu, Sean B. McAdams, Brian B. Lee, Lee Stylos, Judy B. Salzer, G. Jordan Montgomery
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Patent number: 7848808Abstract: An implantable medical device system and method in which the implantable device is adapted to operate in a minimum ventricular pacing mode. The device delivers cardiac pacing pulses in a first pacing mode during a normal mode of operation and upon detecting myocardial ischemia alters the first pacing mode in response to the myocardial ischemia detection.Type: GrantFiled: February 28, 2006Date of Patent: December 7, 2010Assignee: Medtronic, Inc.Inventors: Todd J. Sheldon, William J. Combs, Lee Stylos, Steven N. Lu, Robert J. Nehls
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Patent number: 7715906Abstract: An implantable medical device and associated method monitor a physiological signal for sensing physiological events and detecting a physiological condition in response to the sensed physiological events. The device senses a first event from the physiological signal, senses a noise signal in the physiological signal and senses a next event from the physiological signal wherein the first event and the next event define a signal interval. The signal interval is declared as a noisy interval in response to the sensed noise signal.Type: GrantFiled: June 4, 2007Date of Patent: May 11, 2010Assignee: Medtronic, Inc.Inventors: Paul G. Krause, Karen J. Kleckner, Steven N. Lu, David E. Ritscher, Cameron J. Kaszas, Michael T. Hemming
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Publication number: 20080300497Abstract: An implantable medical device and associated method monitor a physiological signal for sensing physiological events and detecting a physiological condition in response to the sensed physiological events. The device senses a first event from the physiological signal, senses a noise signal in the physiological signal and senses a next event from the physiological signal wherein the first event and the next event define a signal interval. The signal interval is declared as a noisy interval in response to the sensed noise signal.Type: ApplicationFiled: June 4, 2007Publication date: December 4, 2008Inventors: Paul G. Krause, Karen J. Kleckner, Steven N. Lu, David E. Ritscher, Cameron J. Kaszas, Michael T. Hemming
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Publication number: 20080183086Abstract: An implantable medical device monitors ST segment data collected from EGM. ST trends are established and monitored over time. The IMD is able to discern whether the data indicate supply ischemia, demand ischemia, or other physiological causes. The IMD is then able to provide appropriate information and alerts.Type: ApplicationFiled: January 31, 2007Publication date: July 31, 2008Inventors: Zhendong Song, Steven N. Lu, Shailesh K.V. Musley, Eduardo N. Warman
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Publication number: 20080183087Abstract: An implantable medical device monitors ST segment data collected from EGM. ST trends are established and monitored over time. The IMD is able to discern whether the data indicate supply ischemia, demand ischemia, or other physiological causes. The IMD is then able to provide appropriate information and alerts.Type: ApplicationFiled: January 31, 2007Publication date: July 31, 2008Inventors: Zhendong Song, Steven N. Lu
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Patent number: 7120484Abstract: An analog physiologic signal, e.g., the cardiac EGM, sensed by an IMD is filtered with a high pass filter (HPF), the cut-off frequency of the HPF being within a predetermined frequency bandwidth, wherein a low-band portion of the predetermined frequency bandwidth is attenuated in the filtered physiologic signal. The filtered physiologic signal is digitized in real time order, and the digital data set is filtered in reverse time order employing a digital IIR filter having characteristics substantially matching the cut-off frequency and filter characteristics of the HPF. When the system is implemented within an IMD, the filtered digital data set is compressed by lossy compression algorithm, and the compressed data set is filtered in reverse time order.Type: GrantFiled: January 14, 2002Date of Patent: October 10, 2006Assignee: Medtronic, Inc.Inventors: Steven N. Lu, Robert W. Stadler
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Patent number: 7066891Abstract: An implantable medical device (IMD) for gauging the severity of ischemia in a patient's heart includes a data collection module configured to receive data about the patient's heart, a data processing module configured to process the data to identify an episode of ischemia in the patient and to determine if the episode is stable or unstable, and a reporting module configured to provide an alarm to the patient if the episode is unstable. A method executable by an implantable medical device to detect ischemia in a human heart suitably includes the steps of receiving data about the heart at the implantable medical device, processing the data within the implantable medical device to determine the severity of ischemia, and providing a response from the implantable medical device to the patient if ischemia is indicated.Type: GrantFiled: December 20, 2002Date of Patent: June 27, 2006Assignee: Medtronic, Inc.Inventors: Robert W. Stadler, Steven N. Lu, Gary W. King, Thomas R. Moore
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Publication number: 20040122478Abstract: An implantable medical device (IMD) for gauging the severity of ischemia in a patient's heart includes a data collection module configured to receive data about the patient's heart, a data processing module configured to process the data to identify an episode of ischemia in the patient and to determine if the episode is stable or unstable, and a reporting module configured to provide an alarm to the patient if the episode is unstable. A method executable by an implantable medical device to detect ischemia in a human heart suitably includes the steps of receiving data about the heart at the implantable medical device, processing the data within the implantable medical device to determine the severity of ischemia, and providing a response from the implantable medical device to the patient if ischemia is indicated.Type: ApplicationFiled: December 20, 2002Publication date: June 24, 2004Inventors: Robert W. Stadler, Steven N. Lu, Gary W. King, Thomas R. Moore
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Publication number: 20030135125Abstract: An analog physiologic signal, e.g., the cardiac EGM, sensed by an IMD is filtered with a high pass filter (HPF), the cut-off frequency of the HPF being within a predetermined frequency bandwidth, wherein a low-band portion of the predetermined frequency bandwidth is attenuated in the filtered physiologic signal. The filtered physiologic signal is digitized in real time order, and the digital data set is filtered in reverse time order employing a digital IIR filter having characteristics substantially matching the cut-off frequency and filter characteristics of the HPF. When the system is implemented within an IMD, the filtered digital data set is compressed by lossy compression algorithm, and the compressed data set is filtered in reverse time order.Type: ApplicationFiled: January 14, 2002Publication date: July 17, 2003Applicant: Medtronic, Inc.Inventors: Steven N. Lu, Robert W. Stadler
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Patent number: 6317625Abstract: A signal measuring system for use with an Implantable Medical Device (IMD) is provided for measuring physiologic signals having a relatively large effective dynamic range. In one embodiment, the system includes a High-Pass Filter (HPF), an Analog-to-Digital Converter (ADC), a Decimation Filter (DF), and a Compensation Filter (CF). The HPF receives an input signal that includes both the baseline wander imposed on a physiological signal. According to one aspect of the invention, the HPF attenuates low frequency components of the input signal, including a portion of the frequency band within the desired output signal bandwidth. The ADC then oversamples the output signal of the HPF. The DF receives the output samples from the ADC and generates output samples at rate that is at least twice the maximum frequency of the desired output signal. The CF then amplifies the low frequency end of the DF output samples.Type: GrantFiled: November 15, 2000Date of Patent: November 13, 2001Assignee: Medtronic Inc.Inventors: Dana J. Olson, David W. Van Ess, Robert W. Stadler, Steven N. Lu, Jeffrey D. Wilkinson, Tara N. Ptak