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).

  • 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
  • Publication number: 20150133850
    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: March 7, 2013
    Publication date: May 14, 2015
    Inventors: Stefan Tunev, Julie Trudel
  • Publication number: 20150119867
    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: March 7, 2013
    Publication date: April 30, 2015
    Inventors: Neil Barman, Ayala Hezi-Yamit, Stefan Tunev
  • Publication number: 20130046283
    Abstract: Methods and intravascular treatment devices for treating atherosclerosis are provided.
    Type: Application
    Filed: May 4, 2012
    Publication date: February 21, 2013
    Applicant: Medtronic Vascular, Inc.
    Inventors: Ayala Hezi-Yamit, Susan Edwards, Carol Sullivan, Oluwashola Shakirat Sulaimon, Lori Garcia, Stefan Tunev
  • Publication number: 20120315303
    Abstract: Methods and intravascular treatment devices for treating atherosclerosis are provided.
    Type: Application
    Filed: May 4, 2012
    Publication date: December 13, 2012
    Applicant: Medtronic Vascular, Inc.
    Inventors: AYALA HEZI-YAMIT, SUSAN EDWARDS, CAROL SULLIVAN, OLUWASHOLA SHAKIRAT SULAIMON, LORI GARCIA, STEFAN TUNEV
  • Publication number: 20120259314
    Abstract: A method of recanalizing a chronic total occlusion (CTO) is disclosed. A catheter with a guidewire slidingly received therein is positioned proximally adjacent to the CTO. An occlusion weakening therapy effective to quickly soften and/or loosen the CTO is delivered to the CTO via the catheter. The occlusion weakening therapy includes at least one enzyme and a chelating agent which are selectively deliverable either together or separately depending on the type of material encountered by the guidewire. According to various methods, the enzyme(s) may be delivered if tissue is encountered, the chelating agent may be delivered if calcification is encountered, and both enzyme(s) and chelating agent(s) may be delivered if a fibrous cap is encountered. The distal end of the guidewire may be advanced into the CTO shortly after delivery of the occlusion weakening therapy and is manipulated through the CTO until the guidewire successfully crosses the CTO.
    Type: Application
    Filed: April 11, 2011
    Publication date: October 11, 2012
    Applicant: Medtronic Vascular, Inc.
    Inventors: Ya Guo, Stefan Tunev, Joseph Traina
  • Publication number: 20110218606
    Abstract: The invention provides methods for stabilizing the femoral artery.
    Type: Application
    Filed: March 2, 2010
    Publication date: September 8, 2011
    Applicant: Medtronic Vascular, Inc.
    Inventors: Mark J. Dolan, Julie Trudel, Stefan Tunev
  • Publication number: 20110182964
    Abstract: This invention provides implantable medical devices that include delivery systems containing amino acid derivatives, and related methods for making and using. More specifically, this invention provides vascular stents with coatings containing methyl ester derivatives of amino acids, and related methods for making and using.
    Type: Application
    Filed: January 24, 2011
    Publication date: July 28, 2011
    Applicant: Medtronic, Inc.
    Inventors: Robert J. Melder, Stefan Tunev
  • Publication number: 20100124533
    Abstract: An animal model for cardiovascular disease comprising one or more vascular plaque lesions formed at selected sites within a vascular segment of a nonhuman mammal. The vascular plaque lesion is formed by administering a hypercholesterolemic diet to the nonhuman mammal, inflicting an injury to the vascular wall at the selected site after a predetermined exposure to the hypercholesterolemic diet, and applying a hydrogel to the injured vascular wall. Another aspect of the invention provides a method for evaluating a test compound for an effect on atherosclerotic lesion formation comprising administering to a nonhuman mammal a hypercholesterolemic diet, and, after a defined period of time, isolating a segment of a blood vessel using a balloon catheter, inflicting an injury to the vascular wall within the isolated segment, and applying a hydrogel within the vascular segment.
    Type: Application
    Filed: November 20, 2008
    Publication date: May 20, 2010
    Applicant: Medtronic Vascular, Inc.
    Inventors: Stefan Tunev, Ankit Shah, Alejandra Caceres, Ya Guo, Julie Trudel, Phean Him, Ayala Hezi-Yamit