Patents by Inventor Shyam Nagasrinivasa

Shyam Nagasrinivasa 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: 11752313
    Abstract: A balloon catheter includes an elongated catheter shaft, an expandable balloon connected to the elongated catheter shaft, and a sheath that defines a lumen and includes a therapeutic agent disposed within the lumen. The balloon catheter further includes a first configuration and a second configuration. When in the first configuration, the expandable balloon is disposed distally from the sheath such that an outer surface of the expandable balloon does not contact the lumen. Further, when in the second configuration, at least a portion of the outer surface of the expandable balloon is disposed within the lumen of the sheath such that it contacts the therapeutic agent. At least a portion of the therapeutic agent that contacts the outer surface of the expandable balloon is transferred from the lumen of the sheath to the outer surface of the expandable balloon when the balloon catheter is in the second configuration.
    Type: Grant
    Filed: February 4, 2021
    Date of Patent: September 12, 2023
    Assignee: Medtronic Vascular, Inc.
    Inventors: Shyam Nagasrinivasa, Claudio Silvestro
  • Publication number: 20210154445
    Abstract: A balloon catheter includes an elongated catheter shaft, an expandable balloon connected to the elongated catheter shaft, and a sheath that defines a lumen and includes a therapeutic agent disposed within the lumen. The balloon catheter further includes a first configuration and a second configuration. When in the first configuration, the expandable balloon is disposed distally from the sheath such that an outer surface of the expandable balloon does not contact the lumen. Further, when in the second configuration, at least a portion of the outer surface of the expandable balloon is disposed within the lumen of the sheath such that it contacts the therapeutic agent. At least a portion of the therapeutic agent that contacts the outer surface of the expandable balloon is transferred from the lumen of the sheath to the outer surface of the expandable balloon when the balloon catheter is in the second configuration.
    Type: Application
    Filed: February 4, 2021
    Publication date: May 27, 2021
    Inventors: Shyam Nagasrinivasa, Claudio Silvestro
  • Patent number: 10940294
    Abstract: A balloon catheter includes an elongated catheter shaft, an expandable balloon connected to the elongated catheter shaft, and a sheath that defines a lumen and includes a therapeutic agent disposed within the lumen. The balloon catheter further includes a first configuration and a second configuration. When in the first configuration, the expandable balloon is disposed distally from the sheath such that an outer surface of the expandable balloon does not contact the lumen. Further, when in the second configuration, at least a portion of the outer surface of the expandable balloon is disposed within the lumen of the sheath such that it contacts the therapeutic agent. At least a portion of the therapeutic agent that contacts the outer surface of the expandable balloon is transferred from the lumen of the sheath to the outer surface of the expandable balloon when the balloon catheter is in the second configuration.
    Type: Grant
    Filed: April 25, 2016
    Date of Patent: March 9, 2021
    Assignee: MEDTRONIC VASCULAR, INC.
    Inventors: Shyam Nagasrinivasa, Claudio Silvestro
  • Patent number: 10682492
    Abstract: A medical device that is configured to house an expandable balloon includes a tubular sheath and a retaining member. The tubular sheath includes a longitudinal slit that extends parallel to a longitudinal axis of the tubular sheath and the retaining member is configured to retain the tubular sheath in a closed configuration. The tubular sheath may house the expandable balloon while the expandable balloon is attached to a catheter that is configured to navigate the expandable balloon into a body of a patient. The tubular sheath may be configured to house the expandable balloon substantially through the process of inserting the expandable balloon into the vasculature of the patient. Once the expandable balloon has been introduced into the introducer sheath and/or inserted into the vasculature of the patient, the retaining member may be disengaged and the tubular sheath removed from the catheter.
    Type: Grant
    Filed: January 19, 2018
    Date of Patent: June 16, 2020
    Assignee: MEDTRONIC VASCULAR, INC.
    Inventors: Alan Connors, Shyam Nagasrinivasa, Emily Schoenhoff, Janet Komatsu
  • Publication number: 20190224448
    Abstract: A medical device that is configured to house an expandable balloon includes a tubular sheath and a retaining member. The tubular sheath includes a longitudinal slit that extends parallel to a longitudinal axis of the tubular sheath and the retaining member is configured to retain the tubular sheath in a closed configuration. The tubular sheath may house the expandable balloon while the expandable balloon is attached to a catheter that is configured to navigate the expandable balloon into a body of a patient. The tubular sheath may be configured to house the expandable balloon substantially through the process of inserting the expandable balloon into the vasculature of the patient. Once the expandable balloon has been introduced into the introducer sheath and/or inserted into the vasculature of the patient, the retaining member may be disengaged and the tubular sheath removed from the catheter.
    Type: Application
    Filed: January 19, 2018
    Publication date: July 25, 2019
    Inventors: Alan Connors, Shyam Nagasrinivasa, Emily Schoenhoff, Janet Komatsu
  • Publication number: 20170304595
    Abstract: A balloon catheter includes an elongated catheter shaft, an expandable balloon connected to the elongated catheter shaft, and a sheath that defines a lumen and includes a therapeutic agent disposed within the lumen. The balloon catheter further includes a first configuration and a second configuration. When in the first configuration, the expandable balloon is disposed distally from the sheath such that an outer surface of the expandable balloon does not contact the lumen. Further, when in the second configuration, at least a portion of the outer surface of the expandable balloon is disposed within the lumen of the sheath such that it contacts the therapeutic agent. At least a portion of the therapeutic agent that contacts the outer surface of the expandable balloon is transferred from the lumen of the sheath to the outer surface of the expandable balloon when the balloon catheter is in the second configuration.
    Type: Application
    Filed: April 25, 2016
    Publication date: October 26, 2017
    Inventors: Shyam Nagasrinivasa, Claudio Silvestro
  • Patent number: 9549830
    Abstract: A method of deploying an eversible branch stent-graft includes deploying the eversible branch stent-graft into a main vessel such that a collateral opening in a main stent-graft of the eversible branch stent-graft is aligned with an ostium of a branch vessel emanating from the main vessel. A branch stent ring suture threaded though outer exposed crowns of an outer stent ring of the branch stent-graft is grasped and pulled through the collateral opening to evert the branch stent-graft into the branch vessel as a branch anchor suture is removed to release a protruding end of a branch stent-graft from a proximal end of the main stent-graft.
    Type: Grant
    Filed: February 5, 2015
    Date of Patent: January 24, 2017
    Assignee: Medtronic Vascular, Inc.
    Inventors: Walter Bruszewski, Masoumeh Mafi, Shyam Nagasrinivasa, Maria Acosta de Acevedo
  • Publication number: 20150173920
    Abstract: A method of deploying an eversible branch stent-graft includes deploying the eversible branch stent-graft into a main vessel such that a collateral opening in a main stent-graft of the eversible branch stent-graft is aligned with an ostium of a branch vessel emanating from the main vessel. A branch stent ring suture threaded though outer exposed crowns of an outer stent ring of the branch stent-graft is grasped and pulled through the collateral opening to evert the branch stent-graft into the branch vessel as a branch anchor suture is removed to release a protruding end of a branch stent-graft from a proximal end of the main stent-graft.
    Type: Application
    Filed: February 5, 2015
    Publication date: June 25, 2015
    Inventors: Walter Bruszewski, Masoumeh Mafi, Shyam Nagasrinivasa, Maria Acosta de Acevedo
  • Patent number: 8974518
    Abstract: A method of deploying an eversible branch stent-graft includes deploying the eversible branch stent-graft into a main vessel such that a collateral opening in a main stent-graft of the eversible branch stent-graft is aligned with an ostium of a branch vessel emanating from the main vessel. A branch stent ring suture threaded though outer exposed crowns of an outer stent ring of the branch stent-graft is grasped and pulled through the collateral opening to evert the branch stent-graft into the branch vessel as a branch anchor suture is removed to release a protruding end of a branch stent-graft from a proximal end of the main stent-graft.
    Type: Grant
    Filed: March 25, 2008
    Date of Patent: March 10, 2015
    Assignee: Medtronic Vascular, Inc.
    Inventors: Walter Bruszewski, Masoumeh Mafi, Shyam Nagasrinivasa, Maria D. Acosta De Acevedo
  • Publication number: 20090264976
    Abstract: A combination dilator-embolic protection device and method for simultaneously dilating a stenotic body vessel while providing protection from embolic debris and constant perfusion through a treatment site is disclosed. The device includes an expandable dilator-filtration component having a first filtration segment, a second filtration segment and an interior volume, wherein the first filtration segment has at least one opening of a first size that permits passage of embolic debris into the interior volume and the second filtration segment has openings of a second size that is smaller than the first size, such that the second filtration segment retains the embolic debris within the interior volume. The dilator-filtration component is expandable into apposition with a stenosis in the body vessel to provide a radial distensible force to dilate the stenotic body vessel while capturing embolic debris within the dilator-filtration component and allowing blood flow through the dilator-filtration component.
    Type: Application
    Filed: April 17, 2008
    Publication date: October 22, 2009
    Applicant: MEDTRONIC VASCULAR, INC.
    Inventor: Shyam Nagasrinivasa
  • Publication number: 20090248135
    Abstract: A method of deploying an eversible branch stent-graft includes deploying the eversible branch stent-graft into a main vessel such that a collateral opening in a main stent-graft of the eversible branch stent-graft is aligned with an ostium of a branch vessel emanating from the main vessel. A branch stent ring suture threaded though outer exposed crowns of an outer stent ring of the branch stent-graft is grasped and pulled through the collateral opening to evert the branch stent-graft into the branch vessel as a branch anchor suture is removed to release a protruding end of a branch stent-graft from a proximal end of the main stent-graft.
    Type: Application
    Filed: March 25, 2008
    Publication date: October 1, 2009
    Applicant: Medtronic Vascular, Inc.
    Inventors: Walter Bruszewski, Masoumeh Mafi, Shyam Nagasrinivasa, Maria D. Acosta De Acevedo