Patents by Inventor Leo Lee Tsai

Leo Lee Tsai 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).

  • Adjustable stiffness catheter
    Patent number: 10369328
    Abstract: The present invention relates to a catheter that has adjustable stiffness that enables a user to select the stiffness of at least one region of the catheter during insertion and navigation through a body lumen. A preferred embodiment of the invention works in combination with a guidewire to enable placement of the catheter at a position within the vascular system, for example, to enable treatment of a variety of medical conditions. The catheter can include segments that undergo relative movement in response to actuation by the user to adjust the flexibility of the at least one region, preferably located at or near the distal end of the catheter.
    Type: Grant
    Filed: February 19, 2014
    Date of Patent: August 6, 2019
    Assignee: Beth Israel Deaconess Medical Center, Inc.
    Inventors: Leo Lee Tsai, Yuyin Chen, Vyas Ramanan
  • Adjustable stiffness catheter
    Patent number: 10265502
    Abstract: The present invention relates to a catheter that has adjustable stiffness that enables a user to select the stiffness of at least one region of the catheter during insertion and navigation through a body lumen. A preferred embodiment of the invention works in combination with a guidewire to enable placement of the catheter at a position within the vascular system, for example, to enable treatment of a variety of medical conditions. The catheter can include segments that undergo relative movement in response to actuation by the user to adjust the flexibility of the at least one region, preferably located at or near the distal end of the catheter.
    Type: Grant
    Filed: August 18, 2015
    Date of Patent: April 23, 2019
    Assignee: Beth Israel Deaconess Medical Center, Inc.
    Inventors: Leo Lee Tsai, Yuyin Chen, Vyas Ramanan
  • ADJUSTABLE STIFFNESS CATHETER
    Publication number: 20160136393
    Abstract: The present invention relates to a catheter that has adjustable stiffness that enables a user to select the stiffness of at least one region of the catheter during insertion and navigation through a body lumen. A preferred embodiment of the invention works in combination with a guidewire to enable placement of the catheter at a position within the vascular system, for example, to enable treatment of a variety of medical conditions. The catheter can include segments that undergo relative movement in response to actuation by the user to adjust the flexibility of the at least one region, preferably located at or near the distal end of the catheter.
    Type: Application
    Filed: August 18, 2015
    Publication date: May 19, 2016
    Applicant: Beth Israel Deacones Medical Center, Inc.
    Inventors: Leo Lee Tsai, Yuyin Chen, Vyas Ramanan
  • ADJUSTABLE STIFFNESS CATHETER
    Publication number: 20140236120
    Abstract: The present invention relates to a catheter that has adjustable stiffness that enables a user to select the stiffness of at least one region of the catheter during insertion and navigation through a body lumen. A preferred embodiment of the invention works in combination with a guidewire to enable placement of the catheter at a position within the vascular system, for example, to enable treatment of a variety of medical conditions. The catheter can include segments that undergo relative movement in response to actuation by the user to adjust the flexibility of the at least one region, preferably located at or near the distal end of the catheter.
    Type: Application
    Filed: February 19, 2014
    Publication date: August 21, 2014
    Inventors: Leo Lee Tsai, Yuyin Chen, Vyas Ramanan