Patents by Inventor Jianchun Yi
Jianchun Yi 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: 20220117536Abstract: An electrode carrier system includes one or more electrode assemblies having an electrode body. One or more tubular members extend from the electrode body and define a lumen terminating in a distal opening. The electrode assemblies carry a reservoir containing a conductive fluid or gel. The reservoir is in fluid communication with the lumens in the tubular members, and the electrode assemblies are typically supported on a backing which may optionally be configured as a headband. Systems are for tracking patient movement may be used in combination with the electrode carrier system.Type: ApplicationFiled: December 28, 2021Publication date: April 21, 2022Inventors: Josef PARVIZI, Xingjuan CHAO, Bradley G. BACHELDER, Raymond WOO, Mathew A. HERRON, Vahid SAADAT, Alexander M. GRANT, Jianchun YI
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Publication number: 20220117535Abstract: An electrode carrier system includes one or more electrode assemblies having an electrode body. One or more tubular members extend from the electrode body and define a lumen terminating in a distal opening. The electrode assemblies carry a reservoir containing a conductive fluid or gel. The reservoir is in fluid communication with the lumens in the tubular members, and the electrode assemblies are typically supported on a backing which may optionally be configured as a headband. Systems are for tracking patient movement may be used in combination with the electrode carrier system.Type: ApplicationFiled: December 28, 2021Publication date: April 21, 2022Inventors: Josef PARVIZI, Xingjuan CHAO, Bradley G. BACHELDER, Raymond WOO, Mathew A. HERRON, Vahid SAADAT, Alexander M. GRANT, Jianchun YI
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Publication number: 20220031248Abstract: Systems, devices, and methods are provided to assess connection quality between the electrodes of a bioelectrical signal measurement and/or electrical stimulation device and the tissue, typically skin, of the subject. A test signal is provided to a first electrode, voltage differences between the first electrode and additional electrodes are determined, an impedance of the first electrode is determined based on the voltages differences, and the determined impedance indicates connection quality. This process is typically repeated for all of the electrodes to determine connection quality. The user or subject can be alerted if the connection quality is poor, and the bioelectrical signal that is recorded can be provided with data points indicating connection quality during the signal recording.Type: ApplicationFiled: March 16, 2021Publication date: February 3, 2022Inventors: Alexander M. GRANT, Jianchun YI, Bradley G. BACHELDER, Raymond WOO, Josef PARVIZI, Xingjuan CHAO
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Publication number: 20210267539Abstract: Systems and methods for sonifying electrical signals obtained from a living subject, particularly EEG signals, are disclosed. A time-domain signal representing the activity of an organ is obtained. A voltage of the time-domain signal over a time block is determined. An acoustic signal based on the time-domain signal over the time block is produced. The acoustic signal comprises one or more audibly discernible variations representative of the activity of the organ. If the determined voltage is over a threshold voltage, the time-domain signal is squelched over at least a portion of the time-block as the acoustic signal is produced. The time-domain signal can be squelched by ramping down the signal as an input to produce the acoustic signal. The frequency spectrum of the acoustic signal can also be adjusted as it is produced, such as by flattening the signal and/or attenuating high frequencies along the frequency spectrum of the signal.Type: ApplicationFiled: October 28, 2020Publication date: September 2, 2021Inventors: Alexander GRANT, Chris CHAFE, Josef PARVIZI, Jianchun YI, Raymond WOO, Xingjuan CHAO
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Publication number: 20210128044Abstract: An electrode carrier system includes one or more electrode assemblies having an electrode body. One or more tubular members extend from the electrode body and define a lumen terminating in a distal opening. The electrode assemblies carry a reservoir containing a conductive fluid or gel. The reservoir is in fluid communication with the lumens in the tubular members, and the electrode assemblies are typically supported on a backing which may optionally be configured as a headband. Systems are for tracking patient movement may be used in combination with the electrode carrier system.Type: ApplicationFiled: November 4, 2020Publication date: May 6, 2021Inventors: Josef Parvizi, Xingjuan Chao, Bradley G. Bachelder, Raymond Woo, Mathew A. Herron, Vahid Saadat, Alexander M. Grant, Jianchun Yi
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Patent number: 10980480Abstract: Systems, devices, and methods are provided to assess connection quality between the electrodes of a bioelectrical signal measurement and/or electrical stimulation device and the tissue, typically skin, of the subject. A test signal is provided to a first electrode, voltage differences between the first electrode and additional electrodes are determined, an impedance of the first electrode is determined based on the voltages differences, and the determined impedance indicates connection quality. This process is typically repeated for all of the electrodes to determine connection quality. The user or subject can be alerted if the connection quality is poor, and the bioelectrical signal that is recorded can be provided with data points indicating connection quality during the signal recording.Type: GrantFiled: March 25, 2019Date of Patent: April 20, 2021Assignee: CeriBell, Inc.Inventors: Alexander M. Grant, Jianchun Yi, Bradley G. Bachelder, Raymond Woo, Josef Parvizi, Xingjuan Chao
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Publication number: 20210085235Abstract: The present disclosure provides systems and methods for seizure detection. The method for seizure detection may include receiving a plurality of electroencephalography (EEG) signals over a plurality of channels for a subject, preprocessing the plurality of EEG signals by segmenting the plurality of EEG signals for each channel into a plurality of temporal data segments, extracting a plurality of features from each temporal data segment for each channel, and applying a machine learning algorithm to the plurality of features to perform a seizure binary classification for each temporal data segment for each channel. A control policy may be employed to determine a seizure burden on the aggregated seizure binary classifications. When the seizure burden is equal to or exceeds a threshold, a notification may be generated. The notification may be usable by a healthcare practitioner to assess whether the subject may be at risk of having a seizure.Type: ApplicationFiled: July 8, 2020Publication date: March 25, 2021Inventors: Baharan Kamousi, Mehdi Hajinoroozi, Suganya Karunakaran, Alexander M. Grant, Jianchun Yi, Raymond Woo, Josef Parvizi, Xingjuan Chao
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Patent number: 10888240Abstract: An electrode carrier system includes one or more electrode assemblies having an electrode body. One or more tubular members extend from the electrode body and define a lumen terminating in a distal opening. The electrode assemblies carry a reservoir containing a conductive fluid or gel. The reservoir is in fluid communication with the lumens in the tubular members, and the electrode assemblies are typically supported on a backing which may optionally be configured as a headband. Systems are for tracking patient movement may be used in combination with the electrode carrier system.Type: GrantFiled: October 13, 2017Date of Patent: January 12, 2021Assignee: CeriBell, Inc.Inventors: Josef Parvizi, Xingjuan Chao, Bradley G. Bachelder, Raymond Woo, Mathew A. Herron, Vahid Saadat, Alexander M. Grant, Jianchun Yi
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Patent number: 10849553Abstract: Systems and methods for sonifying electrical signals obtained from a living subject, particularly EEG signals, are disclosed. A time-domain signal representing the activity of an organ is obtained. A voltage of the time-domain signal over a time block is determined. An acoustic signal based on the time-domain signal over the time block is produced. The acoustic signal comprises one or more audibly discernible variations representative of the activity of the organ. If the determined voltage is over a threshold voltage, the time-domain signal is squelched over at least a portion of the time-block as the acoustic signal is produced. The time-domain signal can be squelched by ramping down the signal as an input to produce the acoustic signal. The frequency spectrum of the acoustic signal can also be adjusted as it is produced, such as by flattening the signal and/or attenuating high frequencies along the frequency spectrum of the signal.Type: GrantFiled: March 27, 2019Date of Patent: December 1, 2020Assignee: CeriBell, Inc.Inventors: Alexander Grant, Chris Chafe, Josef Parvizi, Jianchun Yi, Raymond Woo, Xingjuan Chao
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Publication number: 20200305786Abstract: Systems and methods for sonifying electrical signals obtained from a living subject, particularly EEG signals, are disclosed. A time-domain signal representing the activity of an organ is obtained. A voltage of the time-domain signal over a time block is determined. An acoustic signal based on the time-domain signal over the time block is produced. The acoustic signal comprises one or more audibly discernible variations representative of the activity of the organ. If the determined voltage is over a threshold voltage, the time-domain signal is squelched over at least a portion of the time-block as the acoustic signal is produced. The time-domain signal can be squelched by ramping down the signal as an input to produce the acoustic signal. The frequency spectrum of the acoustic signal can also be adjusted as it is produced, such as by flattening the signal and/or attenuating high frequencies along the frequency spectrum of the signal.Type: ApplicationFiled: March 27, 2019Publication date: October 1, 2020Inventors: Alexander GRANT, Chris CHAFE, Josef PARVIZI, Jianchun YI, Raymond WOO, Xingjuan CHAO
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Patent number: 10743809Abstract: The present disclosure provides systems and methods for seizure detection. The method for seizure detection may include receiving a plurality of electroencephalography (EEG) signals over a plurality of channels for a subject, preprocessing the plurality of EEG signals by segmenting the plurality of EEG signals for each channel into a plurality of temporal data segments, extracting a plurality of features from each temporal data segment for each channel, and applying a machine learning algorithm to the plurality of features to perform a seizure binary classification for each temporal data segment for each channel. A control policy may be employed to determine a seizure burden on the aggregated seizure binary classifications. When the seizure burden is equal to or exceeds a threshold, a notification may be generated. The notification may be usable by a healthcare practitioner to assess whether the subject may be at risk of having a seizure.Type: GrantFiled: September 20, 2019Date of Patent: August 18, 2020Assignee: CeriBell, Inc.Inventors: Baharan Kamousi, Mehdi Hajinoroozi, Suganya Karunakaran, Alexander Grant, Jianchun Yi, Raymond Woo, Josef Parvizi, Xingjuan Chao
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Publication number: 20190343462Abstract: Systems, devices, and methods are provided to assess connection quality between the electrodes of a bioelectrical signal measurement and/or electrical stimulation device and the tissue, typically skin, of the subject. A test signal is provided to a first electrode, voltage differences between the first electrode and additional electrodes are determined, an impedance of the first electrode is determined based on the voltages differences, and the determined impedance indicates connection quality. This process is typically repeated for all of the electrodes to determine connection quality. The user or subject can be alerted if the connection quality is poor, and the bioelectrical signal that is recorded can be provided with data points indicating connection quality during the signal recording.Type: ApplicationFiled: March 25, 2019Publication date: November 14, 2019Inventors: Alexander M. GRANT, Jianchun YI, Bradley G. BACHELDER, Raymond WOO, Josef PARVIZI, Xingjuan CHAO
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Patent number: 10285646Abstract: Systems, devices, and methods are provided to assess connection quality between the electrodes of a bioelectrical signal measurement and/or electrical stimulation device and the tissue, typically skin, of the subject. A test signal is provided to a first electrode, voltage differences between the first electrode and additional electrodes are determined, an impedance of the first electrode is determined based on the voltages differences, and the determined impedance indicates connection quality. This process is typically repeated for all of the electrodes to determine connection quality. The user or subject can be alerted if the connection quality is poor, and the bioelectrical signal that is recorded can be provided with data points indicating connection quality during the signal recording.Type: GrantFiled: February 27, 2018Date of Patent: May 14, 2019Assignee: CeriBell, Inc.Inventors: Alexander M. Grant, Jianchun Yi, Bradley G. Bachelder, Raymond Woo, Josef Parvizi, Xingjuan Chao
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Patent number: 9233250Abstract: Embodiments of the present invention concern the timing of sending one or more commands to control circuitry of a multi-electrode lead (MEL). In one embodiment, the one or more commands are sent to control circuitry within the MEL during a predetermined portion of a cardiac pacing cycle to avoid potential problems of prior systems that were not synchronized with the cardiac pacing cycle. In one embodiment, the one or more commands are sent when cardiac tissue is refractory from a cardiac pacing pulse, to prevent the command(s) from potentially undesirably stimulating cardiac tissue. The command sending can occur such that the one or more commands are sent between instances when sensing circuitry of the implantable cardiac stimulation device is being used to obtain one or more signals indicative of cardiac electrical activity, to prevent interference between the one or more commands with the signals indicative of cardiac electrical activity that are sensed.Type: GrantFiled: December 29, 2009Date of Patent: January 12, 2016Assignee: Pacesetter, Inc.Inventors: Anne Shelchuk, Yongjian Wu, Chris Pontiga, April Pixley, Pajhand Iranitalab, Elisabeth M. Clem, Shohan Hossain, Jianchun Yi
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Publication number: 20110046690Abstract: Embodiments of the present invention concern the timing of sending one or more commands to control circuitry of a multi-electrode lead (MEL). In one embodiment, the one or more commands are sent to control circuitry within the MEL during a predetermined portion of a cardiac pacing cycle to avoid potential problems of prior systems that were not synchronized with the cardiac pacing cycle. In one embodiment, the one or more commands are sent when cardiac tissue is refractory from a cardiac pacing pulse, to prevent the command(s) from potentially undesirably stimulating cardiac tissue. The command sending can occur such that the one or more commands are sent between instances when sensing circuitry of the implantable cardiac stimulation device is being used to obtain one or more signals indicative of cardiac electrical activity, to prevent interference between the one or more commands with the signals indicative of cardiac electrical activity that are sensed.Type: ApplicationFiled: December 29, 2009Publication date: February 24, 2011Inventors: Anne Shelchuk, Yonglian Wu, Chris Pontiga, April Pixley, Pajhand Iranitalab, Elisabeth M. Clem, Shohan Hossain, Jianchun Yi