Patents by Inventor Stefan Tunev

Stefan Tunev 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).

  • Patent number: 11883087
    Abstract: Methods for treating a patient using therapeutic renal neuromodulation and associated devices, systems, and methods are disclosed herein. One aspect of the present technology is directed to methods including selectively neuromodulating afferent or efferent renal nerves. One or more measurable physiological parameters corresponding to systemic sympathetic overactivity or hyperactivity in the patient can thereby be reduced. Selectively neuromodulating afferent renal nerves can include inhibiting sympathetic neural activity in nerves proximate a renal pelvis. This can include, for example, neuromodulating via fluid within the renal pelvis. Selectively neuromodulating efferent renal nerves can include inhibiting sympathetic neural activity in nerves proximate a portion of a renal artery or a renal branch artery proximate a renal parenchyma. This can include, for example, neuromodulating via a therapeutic element within the portion of the renal artery or the renal branch artery.
    Type: Grant
    Filed: September 30, 2022
    Date of Patent: January 30, 2024
    Assignee: Medtronic Ireland Manufacturing Unlimited Company
    Inventors: Stefan Tunev, Julie Trudel
  • Publication number: 20230181251
    Abstract: Methods for treating a patient using therapeutic renal neuromodulation and associated devices, system, and methods are disclosed herein. One aspect of the present technology is directed to neuromodulating nerve tissue in selected anatomical regions. In one embodiment, the method can include intravascularly advancing an elongate shaft of a catheter to renal vasculature of a human patient and locating a first neuromodulation element of the catheter within a distalmost portion of a main renal artery. The method includes locating a second neuromodulation element of the catheter within a branch vessel of the renal artery distal to a bifurcation at a distal end of the main renal artery. Neuromodulation of the nerve tissue surrounding the selected anatomical treatment locations can inhibit sympathetic neural activity in nerves proximate a portion of a renal artery and/or a renal branch artery proximate a renal parenchyma.
    Type: Application
    Filed: February 2, 2023
    Publication date: June 15, 2023
    Inventors: Robert Melder, Martin Rothman, Stefan Tunev
  • Publication number: 20230024234
    Abstract: Methods for treating a patient using therapeutic renal neuromodulation and associated devices, systems, and methods are disclosed herein. One aspect of the present technology is directed. to methods including selectively neuromodulating afferent or efferent renal nerves, One or more measurable physiological parameters corresponding to systemic sympathetic overactivity or hyperactivity in the patient can thereby be reduced. Selectively neuromodulating afferent renal nerves can include inhibiting sympathetic neural activity in nerves proximate a renal pelvis. This can include, for example, neuromodulating via fluid within the renal pelvis. Selectively neuromodulating efferent renal nerves can include inhibiting sympathetic neural activity in nerves proximate a portion of a renal artery or a renal branch artery proximate a renal parenchyma. This can include, for example, neuromodulating via a therapeutic element within the portion of the renal artery or the renal branch artery.
    Type: Application
    Filed: September 30, 2022
    Publication date: January 26, 2023
    Inventors: Stefan Tunev, Julie Trudel
  • Patent number: 11457968
    Abstract: Methods for treating a patient using therapeutic renal neuromodulation and associated devices, systems, and methods are disclosed herein. One aspect of the present technology is directed to methods including selectively neuromodulating afferent or efferent renal nerves. One or more measurable physiological parameters corresponding to systemic sympathetic overactivity or hyperactivity in the patient can thereby be reduced. Selectively neuromodulating afferent renal nerves can include inhibiting sympathetic neural activity in nerves proximate a renal pelvis. This can include, for example, neuromodulating via fluid within the renal pelvis. Selectively neuromodulating efferent renal nerves can include inhibiting sympathetic neural activity in nerves proximate a portion of a renal artery or a renal branch artery proximate a renal parenchyma. This can include, for example, neuromodulating via a therapeutic element within the portion of the renal artery or the renal branch artery.
    Type: Grant
    Filed: May 10, 2019
    Date of Patent: October 4, 2022
    Assignee: MEDTRONIC ARDIAN LUXEMBOURG S.A.R.L.
    Inventors: Stefan Tunev, Julie Trudel
  • Publication number: 20220023627
    Abstract: Provided herein are methods, devices and compositions for assessing neuromodulation efficacy based on changes in the level of one or more biomarkers in plasma or urine collected from a human subject following a renal neuromodulation procedure.
    Type: Application
    Filed: October 6, 2021
    Publication date: January 27, 2022
    Inventors: Carol Sullivan, Stefan Tunev
  • Patent number: 11154712
    Abstract: Provided herein are methods, devices and compositions for assessing neuromodulation efficacy based on changes in the level of one or more biomarkers in plasma or urine collected from a human subject following a renal neuromodulation procedure.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: October 26, 2021
    Assignee: MEDTRONIC ARDIAN LUXEMBOURG S.A.R.L.
    Inventors: Carol Sullivan, Stefan Tunev
  • Publication number: 20210259762
    Abstract: Methods for treating gastrointestinal conditions, conditions associated with sympathetic and/or parasympathetic activity in the gastrointestinal organs, and conditions associated with central sympathetic and/or parasympathetic activity in a patient with therapeutic gastrointestinalneuromodulation and associated systems and methods are disclosed herein. One aspect of the present technology is directed to methods that at least partially inhibit sympathetic neural activity in nerves proximate a gastrointestinal artery of a gastrointestinal organ of a patient. Sympathetic drive in the patient can thereby be reduced in a manner that treats the patient for the gastrointestinal condition.
    Type: Application
    Filed: May 6, 2021
    Publication date: August 26, 2021
    Inventors: Neil Barman, Ayala Hezi-Yamit, Stefan Tunev
  • Patent number: 11013549
    Abstract: Methods for treating gastrointestinal conditions, conditions associated with sympathetic and/or parasympathetic activity in the gastrointestinal organs, and conditions associated with central sympathetic and/or parasympathetic activity in a patient with therapeutic gastrointestinalneuromodulation and associated systems and methods are disclosed herein. One aspect of the present technology is directed to methods that at least partially inhibit sympathetic neural activity in nerves proximate a gastrointestinal artery of a gastrointestinal organ of a patient. Sympathetic drive in the patient can thereby be reduced in a manner that treats the patient for the gastrointestinal condition.
    Type: Grant
    Filed: March 7, 2013
    Date of Patent: May 25, 2021
    Assignee: MEDTRONIC ARDIAN LUXEMBOURG S.A.R.L.
    Inventors: Neil Barman, Ayala Hezi-Yamit, Stefan Tunev
  • Patent number: 10779972
    Abstract: A stent includes a hollow wire formed into a stent pattern. The hollow wire includes an outer member, a lumen extending longitudinally within the hollow wire, at least one opening extending from an outer surface of the outer member to the lumen, and a surface area component within the hollow wire. The surface area component increases the amount of surface area available for tissue in-growth within the hollow wire. More than one surface area component may be utilized. Each surface area component may be disposed within the lumen or the at least one opening of the hollow wire. A pharmacologically or biologically active agent may be disposed within the lumen.
    Type: Grant
    Filed: November 9, 2017
    Date of Patent: September 22, 2020
    Assignee: Medtronic Vascular, Inc.
    Inventors: Stefan Tunev, Ryan Bienvenu, Justin Peterson, Carol Sullivan, Christopher Storment, Michael Harms
  • Patent number: 10617540
    Abstract: Stents formed from dissimilar materials configured to control tissue growth. A stent may be formed from a composite wire helically wound into a stent having a tubular configuration. The composite wire includes a first wire and a second wire coupled together, the first and second wires being formed from dissimilar metals such that a potential difference is formed when the dissimilar metals are exposed to bodily fluids. The potential difference is configured to inhibit cell proliferation and thereby control tissue growth around the stent after implantation. A stent may be formed from a hollow composite wire including an inner member that includes first and second longitudinal strips formed from dissimilar metals. A stent may be formed from a composite wire having a plurality of windows along a length of the composite wire. An insert formed from a dissimilar metal is disposed within each window of the plurality of windows.
    Type: Grant
    Filed: November 9, 2017
    Date of Patent: April 14, 2020
    Assignee: Medtronic Vascular, Inc.
    Inventors: Justin Peterson, Ryan Bienvenu, Stefan Tunev, Michael Harms
  • Patent number: 10500382
    Abstract: A stent including a hollow wire formed into a stent pattern. The hollow wire includes an outer member having an outer surface and an inner surface, a lumen extending longitudinally within the hollow wire, at least one opening extending from the outer surface of the outer member to the lumen, and a plurality of filaments extending longitudinally within the lumen. The plurality of filaments increases the amount of surface area available for tissue in-growth within the lumen. Each filament of the plurality of filaments is spaced from adjacent filaments of the plurality of filaments, and the spacing between adjacent filaments of the plurality of filaments is configured to permit tissue in-growth between the adjacent filaments.
    Type: Grant
    Filed: November 9, 2017
    Date of Patent: December 10, 2019
    Assignee: Medtronic Vascular, Inc.
    Inventors: Ryan Bienvenu, Justin Peterson, Stefan Tunev, Michael Harms
  • Publication number: 20190328439
    Abstract: Methods for treating a patient using therapeutic renal neuromodulation and associated devices, systems, and methods are disclosed herein. One aspect of the present technology is directed to methods including selectively neuromodulating afferent or efferent renal nerves. One or more measurable physiological parameters corresponding to systemic sympathetic overactivity or hyperactivity in the patient can thereby be reduced. Selectively neuromodulating afferent renal nerves can include inhibiting sympathetic neural activity in nerves proximate a renal pelvis. This can include, for example, neuromodulating via fluid within the renal pelvis. Selectively neuromodulating efferent renal nerves can include inhibiting sympathetic neural activity in nerves proximate a portion of a renal artery or a renal branch artery proximate a renal parenchyma. This can include, for example, neuromodulating via a therapeutic element within the portion of the renal artery or the renal branch artery.
    Type: Application
    Filed: May 10, 2019
    Publication date: October 31, 2019
    Inventors: Stefan Tunev, Julie Trudel
  • Publication number: 20190231420
    Abstract: Methods for treating a patient using therapeutic renal neuromodulation and associated devices, system, and methods are disclosed herein. One aspect of the present technology is directed to neuromodulating nerve tissue in selected anatomical regions. In one embodiment, the method can include intravascularly advancing an elongate shaft of a catheter to renal vasculature of a human patient and locating a first neuromodulation element of the catheter within a distalmost portion of a main renal artery. The method includes locating a second neuromodulation element of the catheter within a branch vessel of the renal artery distal to a bifurcation at a distal end of the main renal artery. Neuromodulation of the nerve tissue surrounding the selected anatomical treatment locations can inhibit sympathetic neural activity in nerves proximate a portion of a renal artery and/or a renal branch artery proximate a renal parenchyma.
    Type: Application
    Filed: February 8, 2019
    Publication date: August 1, 2019
    Inventors: Robert Melder, Martin Rothman, Stefan Tunev
  • Patent number: 10342592
    Abstract: Methods for treating a patient using therapeutic renal neuromodulation and associated devices, systems, and methods are disclosed herein. One aspect of the present technology is directed to methods including selectively neuromodulating afferent or efferent renal nerves. One or more measurable physiological parameters corresponding to systemic sympathetic overactivity or hyperactivity in the patient can thereby be reduced. Selectively neuromodulating afferent renal nerves can include inhibiting sympathetic neural activity in nerves proximate a renal pelvis. This can include, for example, neuromodulating via fluid within the renal pelvis. Selectively neuromodulating efferent renal nerves can include inhibiting sympathetic neural activity in nerves proximate a portion of a renal artery or a renal branch artery proximate a renal parenchyma. This can include, for example, neuromodulating via a therapeutic element within the portion of the renal artery or the renal branch artery.
    Type: Grant
    Filed: March 7, 2013
    Date of Patent: July 9, 2019
    Assignee: Medtronic Ardian Luxembourg S.A.R.L.
    Inventors: Stefan Tunev, Julie Trudel
  • Publication number: 20180125631
    Abstract: Stents formed from dissimilar materials configured to control tissue growth. A stent may be formed from a composite wire helically wound into a stent having a tubular configuration. The composite wire includes a first wire and a second wire coupled together, the first and second wires being formed from dissimilar metals such that a potential difference is formed when the dissimilar metals are exposed to bodily fluids. The potential difference is configured to inhibit cell proliferation and thereby control tissue growth around the stent after implantation. A stent may be formed from a hollow composite wire including an inner member that includes first and second longitudinal strips formed from dissimilar metals. A stent may be formed from a composite wire having a plurality of windows along a length of the composite wire. An insert formed from a dissimilar metal is disposed within each window of the plurality of windows.
    Type: Application
    Filed: November 9, 2017
    Publication date: May 10, 2018
    Inventors: Justin Peterson, Ryan Bienvenu, Stefan Tunev, Michael Harms
  • Publication number: 20180126135
    Abstract: A stent including a hollow wire formed into a stent pattern. The hollow wire includes an outer member having an outer surface and an inner surface, a lumen extending longitudinally within the hollow wire, at least one opening extending from the outer surface of the outer member to the lumen, and a plurality of filaments extending longitudinally within the lumen. The plurality of filaments increases the amount of surface area available for tissue in-growth within the lumen. Each filament of the plurality of filaments is spaced from adjacent filaments of the plurality of filaments, and the spacing between adjacent filaments of the plurality of filaments is configured to permit tissue in-growth between the adjacent filaments.
    Type: Application
    Filed: November 9, 2017
    Publication date: May 10, 2018
    Inventors: Ryan Bienvenu, Justin Peterson, Stefan Tunev, Michael Harms
  • Publication number: 20180125685
    Abstract: A stent includes a hollow wire formed into a stent pattern. The hollow wire includes an outer member, a lumen extending longitudinally within the hollow wire, at least one opening extending from an outer surface of the outer member to the lumen, and a surface area component within the hollow wire. The surface area component increases the amount of surface area available for tissue in-growth within the hollow wire. More than one surface area component may be utilized. Each surface area component may be disposed within the lumen or the at least one opening of the hollow wire. A pharmacologically or biologically active agent may be disposed within the lumen.
    Type: Application
    Filed: November 9, 2017
    Publication date: May 10, 2018
    Inventors: Stefan Tunev, Ryan Bienvenu, Justin Peterson, Carol Sullivan, Christopher Storment, Michael Harms
  • Publication number: 20170347954
    Abstract: Provided herein are methods, devices and compositions for assessing neuromodulation efficacy based on changes in the level of one or more biomarkers in plasma or urine collected from a human subject following a renal neuromodulation procedure.
    Type: Application
    Filed: August 28, 2015
    Publication date: December 7, 2017
    Inventors: Carol SULLIVAN, Stefan TUNEV
  • Publication number: 20160058503
    Abstract: Methods for treating a patient using therapeutic renal neuromodulation and associated devices, system, and methods are disclosed herein. One aspect of the present technology is directed to neuromodulating nerve tissue in selected anatomical regions. In one embodiment, the method can include intravascularly positioning a neuromodulation element of a catheter within renal vasculature of a human patient and modulating nerve tissue within an anatomical region extending circumferentially around a branch vessel along a proximal-most longitudinal length of the branch vessel (e.g., between about 1 mm to about 12 mm distal to a bifurcation). The method can also include positioning the neuromodulation element within a second branch vessel and modulating nerve tissue within an anatomical region extending circumferentially around the second branch vessel along a proximal-most longitudinal length of the second branch vessel (e.g., between about 1 mm to about 12 mm distal to a bifurcation).
    Type: Application
    Filed: August 28, 2015
    Publication date: March 3, 2016
    Inventors: Stefan Tunev, Jennifer Ruwart, Carol Sullivan
  • Publication number: 20150327924
    Abstract: Methods for treating a patient using therapeutic renal neuromodulation and associated devices, system, and methods are disclosed herein. One aspect of the present technology is directed to neuromodulating nerve tissue in selected anatomical regions. In one embodiment, the method can include intravascularly advancing an elongate shaft of a catheter to renal vasculature of a human patient and locating a first neuromodulation element of the catheter within a distalmost portion of a main renal artery. The method includes locating a second neuromodulation element of the catheter within a branch vessel of the renal artery distal to a bifurcation at a distal end of the main renal artery. Neuromodulation of the nerve tissue surrounding the selected anatomical treatment locations can inhibit sympathetic neural activity in nerves proximate a portion of a renal artery and/or a renal branch artery proximate a renal parenchyma.
    Type: Application
    Filed: May 15, 2015
    Publication date: November 19, 2015
    Inventors: Robert Melder, Martin Rothman, Stefan Tunev