Patents by Inventor Raju Viswanathan

Raju Viswanathan 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).

  • Publication number: 20250120764
    Abstract: Systems, devices, and methods described herein relate to catheter devices for therapy delivery in renal denervation applications. In some embodiments, a catheter includes a shaft having first and second sets of electrodes. In some embodiments, each electrode set can include electrodes that are spaced from one another by inter-electrode spacings and being spaced from one another by an inter-set spacing. In some embodiments, the inter-set spacing can be at least 50% greater than each inter-electrode spacing. In some embodiments, the first or second set of electrodes can include at least one basket electrode.
    Type: Application
    Filed: December 23, 2024
    Publication date: April 17, 2025
    Applicant: Alpfa Medical, Inc.
    Inventor: Raju VISWANATHAN
  • Patent number: 12274491
    Abstract: Systems, devices, and methods for electroporation ablation therapy are disclosed herein, with a cinch device for positioning an ablation catheter relative to tissue during a cardiac ablation procedure. In some embodiments, a distal end of a first device may be advanced into a proximal end of a first lumen of a second device. The first device may be advanced from a distal end of the first lumen and the first device may be looped around tissue of a patient. The first device may be advanced into a distal end of a second lumen of the second device. The distal end of the first device may be advanced from a proximal end of the second lumen. The proximal and distal ends of the first device may be advanced away from a proximal end of the second device to increase contact between the first device and the tissue.
    Type: Grant
    Filed: May 3, 2021
    Date of Patent: April 15, 2025
    Assignee: Boston Scientific Scimed, Inc.
    Inventors: Raju Viswanathan, Jean-Luc Pageard
  • Publication number: 20250099151
    Abstract: Systems, devices, and methods described herein relate to generation and delivery of pulsed waveforms, e.g., for therapy delivery in soft tissue ablation procedures. In some embodiments, a pulse generator is configured to generate a voltage pulse train including a plurality of biphasic pulses, each biphasic pulse of the plurality of biphasic pulses including a positive pulse, a negative pulse, and an inter-phase delay separating the positive pulse and the negative pulse. In some embodiments, successive biphasic pulses of the plurality of biphasic pulses can be separated by a pulse-to-pulse delay such that the plurality of biphasic pulses is separated by a plurality of pulse-to-pulse delays, and the plurality of pulse-to-pulse delays can include increasing or decreasing sequences of pulse-to-pulse delays.
    Type: Application
    Filed: December 10, 2024
    Publication date: March 27, 2025
    Inventor: Raju VISWANATHAN
  • Patent number: 12257080
    Abstract: Systems, apparatuses, and methods for electroporation ablation therapy are disclosed, with a protection device for protecting electronic circuitry, devices, and/or other components from induced currents and voltages generated during a cardiac ablation procedure. A system can include an ablation device near cardiac tissue of a heart. The system can further include a signal generator configured to generate a pulse waveform, where the signal generator coupled to the ablation device and configured to repeatedly deliver the pulse waveform to the ablation device in synchrony with a set of cardiac cycles of the heart. The system can further include a protection device configured to suppress induced current and voltage in an electronic device coupled to the protection device.
    Type: Grant
    Filed: June 7, 2021
    Date of Patent: March 25, 2025
    Assignee: Boston Scientific Scimed, Inc.
    Inventors: Raju Viswanathan, William Bowers
  • Publication number: 20250090221
    Abstract: Systems, devices, and methods described herein relate to catheter devices for therapy delivery in tumor treatment applications. In some embodiments, a catheter device includes a shaft defining a lumen, and a needle device disposed in the lumen, the needle device having a distal portion that includes an exposed electrical conductor, where the distal portion of the needle device is configured to be extended out of the lumen. The needle device can be configured to receive a pulsed voltage waveform and to deliver a pulsed electric field via the exposed electrical conductor to ablate surrounding tissue.
    Type: Application
    Filed: November 29, 2024
    Publication date: March 20, 2025
    Inventor: Raju VISWANATHAN
  • Publication number: 20250082401
    Abstract: Systems, devices, and methods for electroporation ablation therapy are disclosed, with the system including a pulse waveform signal generator for medical ablation therapy, and an endocardial ablation device includes an inflatable member and at least one electrode for focal ablation pulse delivery to tissue. The signal generator may deliver voltage pulses to the ablation device in the form of a pulse waveform. The system may include a cardiac stimulator for generation of pacing signals and for sequenced delivery of pulse waveforms in synchrony with the pacing signal.
    Type: Application
    Filed: November 22, 2024
    Publication date: March 13, 2025
    Inventors: Raju Viswanathan, Gary L. Long
  • Publication number: 20250072962
    Abstract: A system includes a pulse waveform generator and an ablation device coupled to the pulse waveform generator. The ablation device includes at least one electrode configured for ablation pulse delivery to tissue during use. The pulse waveform generator is configured to deliver voltage pulses to the ablation device in the form of a pulsed waveform. The pulsed waveform can include multiple levels of hierarchy, and multiple sets of electrodes can be activated such that their pulsed delivery is interleaved with one another.
    Type: Application
    Filed: November 18, 2024
    Publication date: March 6, 2025
    Inventor: Raju Viswanathan
  • Publication number: 20250065116
    Abstract: Systems, devices, and methods for electroporation ablation therapy are disclosed, with the system including a pulse waveform signal generator for medical ablation therapy that may be coupled to an ablation device including at least one electrode for ablation pulse delivery to tissue. The signal generator may generate and deliver voltage pulses to the ablation device in the form of a pulse waveform in a predetermined sequence where the signal generator may independently configure a set of electrodes of an ablation device. The signal generator may further perform active monitoring of a set of electrode channels and discharge excess energy using the set of electrode channels.
    Type: Application
    Filed: October 19, 2024
    Publication date: February 27, 2025
    Inventors: William Bowers, Raju Viswanathan, Gary L. Long
  • Publication number: 20250064509
    Abstract: An electroporation catheter for ablation of cardiac tissue is disclosed. The electroporation catheter includes an elongated shaft having a proximal end and an opposite distal end. The elongated shaft defines an axis. An electrode assembly is coupled to and extends distally from the distal end of the elongated shaft. The electrode assembly is transitionable between a collapsed state and an expanded state. The electrode assembly includes conductive struts that define a spherical shape in the expanded state having a proximal portion coupled to the elongated shaft, a central portion having a maximum radial dimension and a distal portion opposite the elongated shaft. A proximal insulation portion is disposed on the proximal portion of the electrode assembly surrounding each of the plurality of conductive struts. The proximal insulator portion extends from the proximal end to at least the central portion.
    Type: Application
    Filed: August 20, 2024
    Publication date: February 27, 2025
    Inventors: Raju Viswanathan, Gary Long, Brendan Early Koop
  • Publication number: 20240407840
    Abstract: An ablation catheter comprises a proximal portion, a distal portion extending from the proximal portion, the distal portion comprising a set of insulated lead segments each having a distal end; and a set of uninsulated electrode segments, wherein each electrode segment is connected to and extends from the distal ends of a pair of adjacent insulated lead segments, and wherein the distal portion is configured to form a compact first configuration for advancement within a sheath lumen into an endocardial space, and to transform to an expanded second configuration when advanced out of the sheath lumen.
    Type: Application
    Filed: August 21, 2024
    Publication date: December 12, 2024
    Inventors: Raju Viswanathan, Allan Zingeler, Gary Long, Jean-Luc Pageard, Brittney Hachey
  • Publication number: 20240407842
    Abstract: Systems, devices, and methods for electroporation ablation therapy are disclosed, with the device including a set of splines coupled to a catheter for medical ablation therapy. Each spline of the set of splines may include a set of electrodes formed on that spline. The set of splines may be configured for translation to transition between a first configuration and a second configuration. The devices described herein may be used to form a lesion via ablation by irreversible electroporation.
    Type: Application
    Filed: August 21, 2024
    Publication date: December 12, 2024
    Inventors: Raju Viswanathan, Allan Zingeler, Gary Long, Jean-Luc Pageard, Brittney Hachey
  • Publication number: 20240407841
    Abstract: Systems, devices, and methods for electroporation ablation therapy are disclosed, with the device including a set of splines coupled to a catheter for medical ablation therapy. Each spline of the set of splines may include a set of electrodes formed on that spline. The set of splines may be configured for translation to transition between a first configuration and a second configuration. The devices described herein may be used to form a lesion via ablation by irreversible electroporation.
    Type: Application
    Filed: August 21, 2024
    Publication date: December 12, 2024
    Inventors: Raju Viswanathan, Allan Zingeler, Gary Long, Jean-Luc Pageard, Brittney Hachey
  • Patent number: 12150698
    Abstract: Systems, devices, and methods for electroporation ablation therapy are disclosed, with the system including a pulse waveform signal generator for medical ablation therapy, and an endocardial ablation device includes an inflatable member and at least one electrode for focal ablation pulse delivery to tissue. The signal generator may deliver voltage pulses to the ablation device in the form of a pulse waveform. The system may include a cardiac stimulator for generation of pacing signals and for sequenced delivery of pulse waveforms in synchrony with the pacing signal.
    Type: Grant
    Filed: January 15, 2021
    Date of Patent: November 26, 2024
    Assignee: Boston Scientific Scimed, Inc.
    Inventors: Raju Viswanathan, Gary L. Long
  • Patent number: 12144541
    Abstract: A system includes a pulse waveform generator and an ablation device coupled to the pulse waveform generator. The ablation device includes at least one electrode configured for ablation pulse delivery to tissue during use. The pulse waveform generator is configured to deliver voltage pulses to the ablation device in the form of a pulsed waveform. The pulsed waveform can include multiple levels of hierarchy, and multiple sets of electrodes can be activated such that their pulsed delivery is interleaved with one another.
    Type: Grant
    Filed: February 1, 2023
    Date of Patent: November 19, 2024
    Assignee: Boston Scientific Scimed, Inc.
    Inventor: Raju Viswanathan
  • Patent number: 12121720
    Abstract: Systems, devices, and methods for electroporation ablation therapy are disclosed, with the system including a pulse waveform signal generator for medical ablation therapy that may be coupled to an ablation device including at least one electrode for ablation pulse delivery to tissue. The signal generator may generate and deliver voltage pulses to the ablation device in the form of a pulse waveform in a predetermined sequence where the signal generator may independently configure a set of electrodes of an ablation device. The signal generator may further perform active monitoring of a set of electrode channels and discharge excess energy using the set of electrode channels.
    Type: Grant
    Filed: May 13, 2022
    Date of Patent: October 22, 2024
    Assignee: Boston Scientific Scimed, Inc.
    Inventors: William Bowers, Raju Viswanathan, Gary Long
  • Publication number: 20240341834
    Abstract: Systems, devices, and methods for electroporation ablation therapy are disclosed, with the device including a first jaw including a plurality of first electrodes and a second jaw including a plurality of second electrodes. The first jaw and the second jaw may be substantially rigid, elongate, and collectively define a longitudinal axis. The first jaw and the second jaw may be configured to engage tissue therebetween during use.
    Type: Application
    Filed: June 25, 2024
    Publication date: October 17, 2024
    Inventors: Raju Viswanathan, Gary L. Long
  • Patent number: 12042208
    Abstract: Systems, devices, and methods for electroporation ablation therapy are disclosed, with the device including a first jaw including a plurality of first electrodes and a second jaw including a plurality of second electrodes. The first jaw and the second jaw may be substantially rigid, elongate, and collectively define a longitudinal axis. The first jaw and the second jaw may be configured to engage tissue therebetween during use.
    Type: Grant
    Filed: November 2, 2020
    Date of Patent: July 23, 2024
    Assignee: Boston Scientific Scimed, Inc.
    Inventors: Raju Viswanathan, Gary L. Long
  • Publication number: 20240050741
    Abstract: Systems, devices, and methods for electroporation ablation therapy are disclosed in the context of esophageal ablation. An ablation device may include a first catheter defining a longitudinal axis and a lumen therethrough. A balloon may be coupled to the first catheter. The balloon may be configured to transition between a deflated configuration and an inflated configuration. A second catheter may extend from a distal end of the first catheter lumen. A set of splines including electrodes formed on a surface of each of the splines may couple to the distal end of the first catheter lumen and a distal portion of the second catheter. The second catheter may be configured for translation along the longitudinal axis to transition the set of splines between a first configuration and a second configuration.
    Type: Application
    Filed: October 25, 2023
    Publication date: February 15, 2024
    Inventors: Raju Viswanathan, Gary Long, Jean-Luc Pageard
  • Patent number: 11833350
    Abstract: Systems, devices, and methods for electroporation ablation therapy are disclosed in the context of esophageal ablation. An ablation device may include a first catheter defining a longitudinal axis and a lumen therethrough. A balloon may be coupled to the first catheter. The balloon may be configured to transition between a deflated configuration and an inflated configuration. A second catheter may extend from a distal end of the first catheter lumen. A set of splines including electrodes formed on a surface of each of the splines may couple to the distal end of the first catheter lumen and a distal portion of the second catheter. The second catheter may be configured for translation along the longitudinal axis to transition the set of splines between a first configuration and a second configuration.
    Type: Grant
    Filed: March 30, 2020
    Date of Patent: December 5, 2023
    Assignee: Boston Scientific Scimed, Inc.
    Inventors: Raju Viswanathan, Gary Long, Jean-Luc Pageard
  • Publication number: 20230301708
    Abstract: Systems, tools and methods are disclosed for the selective and rapid application of DC voltage to drive irreversible electroporation, with the system controller capable of being configured to apply voltages to independently selected subsets of electrodes and capable of generating at least one control signal to maintain the temperature near an electrode head within a desired range of values. Electrode clamp devices are also disclosed for generating electric fields to drive irreversible electroporation while modulating temperature to elevate the irreversible electroporation threshold utilizing a variety of means such as cooling fluid or solid state thermoelectric heat pumps.
    Type: Application
    Filed: April 10, 2023
    Publication date: September 28, 2023
    Inventors: Steven R. MICKELSEN, Raju VISWANATHAN, Allan ZINGELER