Patents by Inventor Xiang Ian Gu
Xiang Ian Gu 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: 11857748Abstract: Methods and devices that provide enhanced delivery of a composition to a body region of a patient utilizing radiofrequency energy include directing a first electrode and a second electrode coupled to a radiofrequency energy source to a location proximate to the body region. Radiofrequency energy is provided in modulated pulses from the radiofrequency energy source to the body region from at least one of the first electrode and the second electrode to provide a delivery condition configured to enhance delivery of the composition. The composition is delivered proximate to the body region using a composition delivery element. Devices for enhance composition delivery are also disclosed.Type: GrantFiled: October 20, 2017Date of Patent: January 2, 2024Assignee: ASAHI MEDICAL TECHNOLOGIES, INC.Inventors: Wayne Ogata, Xiang Ian Gu, Steven Meyer
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Publication number: 20230355941Abstract: Methods and devices that provide enhanced delivery of a composition to a body region of a patient utilizing radiofrequency energy include directing a first electrode and a second electrode coupled to a radiofrequency energy source to a location proximate to the body region. Radiofrequency energy is provided in modulated pulses from the radiofrequency energy source to the body region from at least one of the first electrode and the second electrode to provide a delivery condition configured to enhance delivery of the composition. The composition is delivered proximate to the body region using a composition delivery element. Devices for enhance composition delivery are also disclosed.Type: ApplicationFiled: July 20, 2023Publication date: November 9, 2023Inventors: Wayne OGATA, Xiang Ian GU, Steven MEYER
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Patent number: 11717334Abstract: A radiofrequency guidewire includes a core wire configured to be coupled to a radiofrequency generator. The core wire includes a proximal end and a distal end with respect to the radiofrequency generator. A tip structure is coupled to the core wire proximate the distal end. The tip structure includes one or more edge surfaces. The one or more edge surfaces provide an area of reduced curvature radius on the tip structure. The area of reduced curvature radius generates a higher electric field than other areas of the tip structure during a delivery of radiofrequency energy on the tip structure. A method of ablating an occlusion utilizing the radiofrequency guidewire is also disclosed.Type: GrantFiled: February 18, 2016Date of Patent: August 8, 2023Assignee: ASAHI MEDICAL TECHNOLOGIES, INC.Inventors: Wayne Ogata, Xiang Ian Gu, Steven Meyer, Osamu Katoh
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Publication number: 20190262594Abstract: Methods and devices that provide enhanced delivery of a composition to a body region of a patient utilizing radiofrequency energy include directing a first electrode and a second electrode coupled to a radiofrequency energy source to a location proximate to the body region. Radiofrequency energy is provided in modulated pulses from the radiofrequency energy source to the body region from at least one of the first electrode and the second electrode to provide a delivery condition configured to enhance delivery of the composition. The composition is delivered proximate to the body region using a composition delivery element. Devices for enhance composition delivery are also disclosed.Type: ApplicationFiled: October 20, 2017Publication date: August 29, 2019Applicant: ASAHI MEDICAL TECHNOLOGIES, INC.Inventors: Wayne OGATA, Xiang Ian GU, Steven MEYER
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Patent number: 10383683Abstract: A redirecting delivery catheter includes a first longitudinal member having an inner chamber configured to receive a second longitudinal member, an outer surface surrounding the inner chamber, a first region located at a proximal end, a second region located at a distal end, and a length. An opening in the outer surface extends along a portion of the length of the first longitudinal member between the first region and the second region. A deflecting mechanism is located proximate to the opening and is configured to be capable of transforming from a first position to a second position. The deflecting mechanism is configured to enable the second longitudinal member to access the second region in the second position and to deflect the second longitudinal member towards the opening in the first position. Methods of use of the redirecting delivery catheter are also disclosed.Type: GrantFiled: October 20, 2015Date of Patent: August 20, 2019Assignee: ASAHI MEDICAL TECHNOLOGIES, INC.Inventors: Wayne Ogata, Steven Meyer, Xiang Ian Gu
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Patent number: 10201383Abstract: An apparatus comprises a first longitudinal member and a second longitudinal member configured to be located near a tissue region. An energy source is coupled to first longitudinal member and second longitudinal member. A measuring device is configured to measure at least one characteristic of the tissue region. An energy controller is coupled to the energy source and the measuring device. The energy controller includes a processor coupled to a memory and configured to execute programmed instructions stored in the memory, comprising initiating a delivery of energy to the tissue region from the energy source. One or more items of data are received from the measuring device based on the delivery of energy to the tissue region. The delivery of energy to the tissue region is adjusted based on the one or more items of data.Type: GrantFiled: March 17, 2014Date of Patent: February 12, 2019Assignee: Retrovascular, Inc.Inventors: Wayne Ogata, Xiang Ian Gu, Steven Meyer, Alireza Yavari
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Patent number: 9943245Abstract: A method and apparatus for measuring an impedance of a tissue region inside a body of a patient. A first guidewire is advanced into a tissue region of a body of a patient, wherein the first guidewire comprises one or more electrodes electrically coupled to the tissue region. A second guidewire is advanced into the body, wherein the second guidewire comprises one or more electrodes electrically coupled to the tissue region of the body of the patient and spaced from the first guidewire. An error correction electrode is electrically coupled to the body. A voltage is applied across the first and the second guidewires. The impedance of the tissue region between the first and the second guidewires is measured while using an electrical pathway created by the error correction electrode.Type: GrantFiled: March 17, 2014Date of Patent: April 17, 2018Assignee: Retrovascular, Inc.Inventors: Xiang Ian Gu, Paul J. Lingane, Wayne Ogata, Steven Meyer, Alireza Yavari
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Publication number: 20160235463Abstract: A radiofrequency guidewire includes a core wire configured to be coupled to a radiofrequency generator. The core wire includes a proximal end and a distal end with respect to the radiofrequency generator. A tip structure is coupled to the core wire proximate the distal end. The tip structure includes one or more edge surfaces. The one or more edge surfaces provide an area of reduced curvature radius on the tip structure. The area of reduced curvature radius generates a higher electric field than other areas of the tip structure during a delivery of radiofrequency energy on the tip structure. A method of ablating an occlusion utilizing the radiofrequency guidewire is also disclosed.Type: ApplicationFiled: February 18, 2016Publication date: August 18, 2016Inventors: Wayne Ogata, Xiang Ian Gu, Steven Meyer, Osamu Katoh
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Publication number: 20160106499Abstract: A redirecting delivery catheter includes a first longitudinal member having an inner chamber configured to receive a second longitudinal member, an outer surface surrounding the inner chamber, a first region located at a proximal end, a second region located at a distal end, and a length. An opening in the outer surface extends along a portion of the length of the first longitudinal member between the first region and the second region. A deflecting mechanism is located proximate to the opening and is configured to be capable of transforming from a first position to a second position. The deflecting mechanism is configured to enable the second longitudinal member to access the second region in the second position and to deflect the second longitudinal member towards the opening in the first position. Methods of use of the redirecting delivery catheter are also disclosed.Type: ApplicationFiled: October 20, 2015Publication date: April 21, 2016Inventors: Wayne Ogata, Steven Meyer, Xiang Ian Gu
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Publication number: 20140309632Abstract: An apparatus comprises a first longitudinal member and a second longitudinal member configured to be located near a tissue region. An energy source is coupled to first longitudinal member and second longitudinal member. A measuring device is configured to measure at least one characteristic of the tissue region. An energy controller is coupled to the energy source and the measuring device. The energy controller includes a processor coupled to a memory and configured to execute programmed instructions stored in the memory, comprising initiating a delivery of energy to the tissue region from the energy source. One or more items of data are received from the measuring device based on the delivery of energy to the tissue region. The delivery of energy to the tissue region is adjusted based on the one or more items of data.Type: ApplicationFiled: March 17, 2014Publication date: October 16, 2014Applicant: RetroVascular, Inc.Inventors: Wayne Ogata, Xiang Ian Gu, Steven Meyer, Alireza Yavari
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Publication number: 20140275912Abstract: A method and apparatus for measuring an impedance of a tissue region inside a body of a patient. A first guidewire is advanced into a tissue region of a body of a patient, wherein the first guidewire comprises one or more electrodes electrically coupled to the tissue region. A second guidewire is advanced into the body, wherein the second guidewire comprises one or more electrodes electrically coupled to the tissue region of the body of the patient and spaced from the first guidewire. An error correction electrode is electrically coupled to the body. A voltage is applied across the first and the second guidewires. The impedance of the tissue region between the first and the second guidewires is measured while using an electrical pathway created by the error correction electrode.Type: ApplicationFiled: March 17, 2014Publication date: September 18, 2014Applicant: RetroVascular, Inc.Inventors: Xiang Ian Gu, Paul J. Lingane, Wayne Ogata, Steven Meyer, Alireza Yavari