Patents by Inventor Eugene G. Chen

Eugene G. Chen 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).

  • Shape lockable apparatus and method for advancing an instrument through unsupported anatomy
    Patent number: 6790173
    Abstract: Apparatus and methods are provided for placing and advancing a diagnostic or therapeutic instrument in a hollow body organ of a tortuous or unsupported anatomy, comprising a handle, an overtube, a distal region having an atraumatic tip. The overtube may be removable from the handle, and have a longitudinal axis disposed at an angle relative to the handle. The overtube may be selectively stiffened to reduce distension of the organ caused by advancement of the diagnostic or therapeutic instrument. The distal region permits passive steering of the overtube caused by deflection of the diagnostic or therapeutic instrument while the atraumatic tip prevents the wall of the organ from becoming caught or pinched during manipulation of the diagnostic or therapeutic instrument.
    Type: Grant
    Filed: June 13, 2002
    Date of Patent: September 14, 2004
    Assignee: USGI Medical, Inc.
    Inventors: Vahid Saadat, Richard C. Ewers, Eugene G. Chen
  • Shape lockable apparatus and method for advancing an instrument through unsupported anatomy
    Patent number: 6783491
    Abstract: Apparatus and methods are provided for placing and advancing a diagnostic or therapeutic instrument in a hollow body organ of a tortuous or unsupported anatomy, comprising a handle, an overtube, a distal region having an atraumatic tip. The overtube may be removable from the handle, and have a longitudinal axis disposed at an angle relative to the handle. The overtube may be selectively stiffened to reduce distension of the organ caused by advancement of the diagnostic or therapeutic instrument. The distal region permits passive steering of the overtube caused by deflection of the diagnostic or therapeutic instrument while the atraumatic tip prevents the wall of the organ from becoming caught or pinched during manipulation of the diagnostic or therapeutic instrument.
    Type: Grant
    Filed: June 13, 2002
    Date of Patent: August 31, 2004
    Inventors: Vahid Saadat, Richard C. Ewers, Eugene G. Chen
  • Shape lockable apparatus and method for advancing an instrument through unsupported anatomy
    Publication number: 20030233025
    Abstract: Apparatus and methods are provided for placing and advancing a diagnostic or therapeutic instrument in a hollow body organ of a tortuous or unsupported anatomy, comprising a handle, an overtube, a distal region having an atraumatic tip. The overtube may be removable from the handle, and have a longitudinal axis disposed at an angle relative to the handle. The overtube may be selectively stiffened to reduce distension of the organ caused by advancement of the diagnostic or therapeutic instrument. The distal region permits passive steering of the overtube caused by deflection of the diagnostic or therapeutic instrument while the atraumatic tip prevents the wall of the organ from becoming caught or pinched during manipulation of the diagnostic or therapeutic instrument.
    Type: Application
    Filed: June 13, 2002
    Publication date: December 18, 2003
    Inventors: Vahid Saadat, Richard C. Ewers, Eugene G. Chen
  • Shape lockable apparatus and method for advancing an instrument through unsupported anatomy
    Publication number: 20030233027
    Abstract: Apparatus and methods are provided for placing and advancing a diagnostic or therapeutic instrument in a hollow body organ of a tortuous or unsupported anatomy, comprising a handle, an overtube, a distal region having an atraumatic tip. The overtube may be removable from the handle, and have a longitudinal axis disposed at an angle relative to the handle. The overtube may be selectively stiffened to reduce distension of the organ caused by advancement of the diagnostic or therapeutic instrument. The distal region permits passive steering of the overtube caused by deflection of the diagnostic or therapeutic instrument while the atraumatic tip prevents the wall of the organ from becoming caught or pinched during manipulation of the diagnostic or therapeutic instrument.
    Type: Application
    Filed: June 13, 2002
    Publication date: December 18, 2003
    Inventors: Richard C. Ewers, Vahid Saadat, Eugene G. Chen
  • Shape lockable apparatus and method for advancing an instrument through unsupported anatomy
    Publication number: 20030233026
    Abstract: Apparatus and methods are provided for placing and advancing a diagnostic or therapeutic instrument in a hollow body organ of a tortuous or unsupported anatomy, comprising a handle, an overtube, a distal region having an atraumatic tip. The overtube may be removable from the handle, and have a longitudinal axis disposed at an angle relative to the handle. The overtube may be selectively stiffened to reduce distension of the organ caused by advancement of the diagnostic or therapeutic instrument. The distal region permits passive steering of the overtube caused by deflection of the diagnostic or therapeutic instrument while the atraumatic tip prevents the wall of the organ from becoming caught or pinched during manipulation of the diagnostic or therapeutic instrument.
    Type: Application
    Filed: June 13, 2002
    Publication date: December 18, 2003
    Inventors: Vahid Saadat, Richard C. Ewers, Eugene G. Chen
  • Shape lockable apparatus and method for advancing an instrument through unsupported anatomy
    Publication number: 20030233056
    Abstract: Apparatus and methods are provided for placing and advancing a diagnostic or therapeutic instrument in a hollow body organ of a tortuous or unsupported anatomy, comprising a handle, an overtube, a distal region having an atraumatic tip. The overtube may be removable from the handle, and have a longitudinal axis disposed at an angle relative to the handle. The overtube may be selectively stiffened to reduce distension of the organ caused by advancement of the diagnostic or therapeutic instrument. The distal region permits passive steering of the overtube caused by deflection of the diagnostic or therapeutic instrument while the atraumatic tip prevents the wall of the organ from becoming caught or pinched during manipulation of the diagnostic or therapeutic instrument.
    Type: Application
    Filed: June 13, 2002
    Publication date: December 18, 2003
    Inventors: Vahid Saadat, Richard C. Ewers, Eugene G. Chen