Patents Assigned to Vidamed, Inc.
  • Patent number: 7387626
    Abstract: A medical probe device comprises a catheter having a stylet guide housing with one or more stylet ports in a side wall thereof and a stylet guide for directing a flexible stylet outward through the stylet port and through intervening tissue at a preselected, adjustable angle to a target tissue. The total catheter assembly includes a stylet guide lumen communicating with the stylet port and a stylet positioned in said stylet guide lumen for longitudinal movement from the port through intervening tissue to a target tissue. The stylet can be an electrical conductor enclosed within a non-conductive layer, the electrical conductor being a radiofrequency electrode. Preferably, the non-conductive layer is a sleeve which is axially moveable on the electrical conductor to expose a selected portion of the electrical conductor surface in the target tissue. The stylet can also be a microwave antenna. The stylet can also be a hollow tube for delivering treatment fluid to the target tissue.
    Type: Grant
    Filed: August 3, 2004
    Date of Patent: June 17, 2008
    Assignee: Medtronic Vidamed, Inc.
    Inventors: Stuart D. Edwards, Ronald G. Lax, Ingemar H. Lundquist, Hugh R. Sharkey
  • Patent number: 6852091
    Abstract: A medical probe device comprises a catheter having a stylet guide housing with one or more stylet ports in a side wall thereof and a stylet guide for directing a flexible stylet outward through the stylet port and through intervening tissue at a preselected, adjustable angle to a target tissue. The total catheter assembly includes a stylet guide lumen communicating with the stylet port and a stylet positioned in said stylet guide lumen for longitudinal movement from the port through intervening tissue to a target tissue. The stylet can be an electrical conductor enclosed within a non-conductive layer, the electrical conductor being a radiofrequency electrode. Preferably, the non-conductive layer is a sleeve which is axially moveable on the electrical conductor to expose a selected portion of the electrical conductor surface in the target tissue. The stylet can also be a microwave antenna. The stylet can also be a hollow tube for delivering treatment fluid to the target tissue.
    Type: Grant
    Filed: April 15, 2002
    Date of Patent: February 8, 2005
    Assignee: Medtronic Vidamed, Inc.
    Inventors: Stuart D. Edwards, Ronald G. Lax, Ingemar H. Lundquist, Hugh R. Sharkey
  • Patent number: 6814712
    Abstract: A medical probe device comprises a catheter having a stylet guide housing with one or more stylet ports in a side wall thereof and a stylet guide for directing a flexible stylet outward through the stylet port and through intervening tissue at a preselected, adjustable angle to a target tissue. The total catheter assembly includes a stylet guide lumen communicating with the stylet port and a stylet positioned in said stylet guide lumen for longitudinal movement from the port through intervening tissue to a target tissue. The stylet can be an electrical conductor enclosed within a non-conductive layer, the electrical conductor being a radiofrequency electrode. Preferably, the non-conductive layer is a sleeve which is axially moveable on the electrical conductor to expose a selected portion of the electrical conductor surface in the target tissue. The stylet can also be a microwave antenna. The stylet can also be a hollow tube for delivering treatment fluid to the target tissue.
    Type: Grant
    Filed: October 1, 1996
    Date of Patent: November 9, 2004
    Assignee: Vidamed, Inc.
    Inventors: Stuart D. Edwards, Ronald G. Lax, Ingemar H. Lundquist, Hugh R. Sharkey
  • Patent number: 6730079
    Abstract: A method for calculating the impedance in a first circuit coupling a first radio frequency electrode to a radio frequency controller where the first electrode is disposed in tissue in the vicinity of a second radio frequency electrode coupled to a second circuit. The impedance IMP of the first circuit is measured when energy is being supplied to both electrodes. The impedance IMP0 of the first circuit is also measured when energy is being supplied to the first electrode but not to the second electrode, and subtracted from the impedance value IMP to determine a delta value IMP&Dgr;. The impedance IMP2 of the first circuit is then measured when energy is being supplied to both electrodes. The impedance delta value IMP&Dgr; is subtracted from the impedance value IMP2 to arrive at a calculated impedance value for the first circuit. A computer-readable memory and apparatus utilizing the method are provided.
    Type: Grant
    Filed: July 22, 2002
    Date of Patent: May 4, 2004
    Assignee: Medtronic Vidamed, Inc.
    Inventor: James G. Lovewell
  • Publication number: 20040015161
    Abstract: A method for monitoring the impedance in a circuit coupling a radio frequency electrode to a radio frequency generator to control the power supplied by the generator to the electrode during a treatment procedure. In the method, the impedance in the circuit is monitored over a length of time. An expected impedance at the end of the treatment procedure is calculated from the monitored impedance and compared to a predetermined maximum impedance. The power supplied to the circuit is reduced if the expected impedance is greater than the predetermined maximum impedance. A computer-readable memory and apparatus utilizing the method are provided.
    Type: Application
    Filed: July 22, 2002
    Publication date: January 22, 2004
    Applicant: MEDTRONIC VIDAMED, INC.
    Inventor: James G. Lovewell
  • Publication number: 20040015162
    Abstract: A method for treating tissue of a mammalian body in which the conductivity of the tissue is characterized. The amount of a conductive liquid to supply to the tissue is determined as a function of the conductivity of the tissue and injected into the tissue over an interval of time. Electromagnetic energy is supplied to the tissue to form a lesion in the tissue. A computer-readable memory and a radio frequency generator and controller utilizing such method are further provided.
    Type: Application
    Filed: July 22, 2002
    Publication date: January 22, 2004
    Applicant: MEDTRONIC VIDAMED, INC.
    Inventor: Thomas H. McGaffigan
  • Publication number: 20040015160
    Abstract: A method for calculating the impedance in a first circuit coupling a first radio frequency electrode to a radio frequency controller where the first electrode is disposed in tissue in the vicinity of a second radio frequency electrode coupled to a second circuit. The impedance IMP of the first circuit is measured when energy is being supplied to both electrodes. The impedance IMP0 of the first circuit is also measured when energy is being supplied to the first electrode but not to the second electrode, and subtracted from the impedance value IMP to determine a delta value IMP. The impedance IMP2 of the first circuit is then measured when energy is being supplied to both electrodes. The impedance delta value IMP is subtracted from the impedance value IMP2 to arrive at a calculated impedance value for the first circuit. A computer-readable memory and apparatus utilizing the method are provided.
    Type: Application
    Filed: July 22, 2002
    Publication date: January 22, 2004
    Applicant: MEDTRONIC VIDAMED, INC.
    Inventor: James G. Lovewell
  • Patent number: 6610054
    Abstract: A medical probe device comprises a catheter having a stylet guide housing with one or more stylet ports in a side wall thereof and a stylet guide for directing a flexible stylet outward through the stylet port and through intervening tissue at a preselected, adjustable angle to a target tissue. The total catheter assembly includes a stylet guide lumen communicating with the stylet port and a stylet positioned in said stylet guide lumen for longitudinal movement from the port through intervening tissue to a target tissue. The stylet can be an electrical conductor enclosed within a non-conductive layer, the electrical conductor being a radiofrequency electrode. Preferably, the non-conductive layer is a sleeve which is axially moveable on the electrical conductor to expose a selected portion of the electrical conductor surface in the target tissue. The stylet can also be a microwave antenna. The stylet can also be a hollow tube for delivering treatment fluid to the target tissue.
    Type: Grant
    Filed: November 27, 1996
    Date of Patent: August 26, 2003
    Assignee: Vidamed, Inc.
    Inventors: Stuart D. Edwards, Ronald G. Lax, Ingemar H. Lundquist, Hugh R. Sharkey
  • Patent number: 6607529
    Abstract: An electrosurgical device comprising an elongate probe member having proximal and distal extremities and a passage extending from the proximal extremity to an opening at the distal extremity. The elongate probe member is provided with an elongate cutout adjacent the opening so that the elongate probe member is formed with an elongate extension projecting alongside the cutout beyond the opening. A guide canula is mounted in the passage of the elongate probe member and has proximal and distal extremities and a lumen extending therethrough. A radio frequency electrode is disposed in the lumen and an insulating sleeve is coaxially disposed on the radio frequency electrode. A handle is secured to the proximal extremity of the guide canula for advancing and retracting the radio frequency electrode and the insulating sleeve with respect to the guide canula and for causing bending of the distal extremity of the guide cannula into the cutout.
    Type: Grant
    Filed: June 19, 1995
    Date of Patent: August 19, 2003
    Assignee: Medtronic Vidamed, Inc.
    Inventors: Christopher Scott Jones, Phillip R. Sommer, James Allen Baker, Jr.
  • Patent number: 6551300
    Abstract: A device for delivering a topically applied anesthetic agent gel to a wall forming a passage in tissue comprising a flexible elongate cylindrical member having proximal and distal extremities. The member is sized so that it can be inserted into the passage. An anesthetic agent is carried by the member for supplying the anesthetic agent along at least the distal extremity of the member for a sufficient period of time to anesthesize the wall and the tissue surrounding the wall whereby other medical devices can be inserted into the passage without substantial pain to the patient.
    Type: Grant
    Filed: October 4, 2000
    Date of Patent: April 22, 2003
    Assignee: Vidamed, Inc.
    Inventor: Thomas H. McGaffigan
  • Patent number: 6514247
    Abstract: A transurethral needle ablation device for use by a human hand to treat the prostate of a human male. The device includes a cartridge assembly having an elongate probe member and a stylet. The elongate probe member has proximal and distal extremities and is provided with a passageway extending from the proximal extremity to the distal extremity. The stylet is slidably mounted in the passageway of the elongate probe member. A housing is included in the device. The cartridge assembly is removably mountable on the housing. An assembly adapted for actuation by the human hand is carried by the housing and coupled to the proximal extremity of the stylet for causing the distal extremity of the stylet to extend into the tissue of the prostate.
    Type: Grant
    Filed: October 8, 1999
    Date of Patent: February 4, 2003
    Assignee: Vidamed, Inc.
    Inventors: Thomas H. McGaffigan, Christopher S. Jones
  • Publication number: 20020183740
    Abstract: A medical probe device comprises a catheter having a stylet guide housing with one or more stylet ports in a side wall thereof and a stylet guide for directing a flexible stylet outward through the stylet port and through intervening tissue at a preselected, adjustable angle to a target tissue.
    Type: Application
    Filed: April 15, 2002
    Publication date: December 5, 2002
    Applicant: VIDAMED, INC.
    Inventors: Stuart D. Edwards, Ronald G. Lax, Ingemar H. Lundquist, Hugh R. Sharkey
  • Patent number: 6464661
    Abstract: A medical probe device of this invention comprising a catheter having a control end and a probe end. The probe end includes a stylet guide housing having at least one stylet port and stylet guide means for directing a flexible stylet outward through at least one stylet port and through intervening tissue to targeted tissues. A stylet is positioned in at least one of said stylet guide means, the stylet comprising a non-conductive sleeve having a RF electrode lumen and an optional a fluid supply lumen and a temperature sensor lumen therein. At least one portion of an opposed surface of the electrode lumen and the electrode can be spaced apart to define a liquid supply passageway for delivery of medicament liquid.
    Type: Grant
    Filed: March 27, 2001
    Date of Patent: October 15, 2002
    Assignee: Vidamed, Inc.
    Inventors: Stuart D. Edwards, Hugh R. Sharkey, Ingemar H. Lundquist, Ronald G. Lax, James Allen Baker, Jr.
  • Patent number: 6419653
    Abstract: A medical probe device comprises a catheter having a stylet guide housing with one or more stylet ports in a side wall thereof and a stylet guide for directing a flexible stylet outward through the stylet port and through intervening tissue at a preselected, adjustable angle to a target tissue. The total catheter assembly includes a stylet guide lumen communicating with the stylet port and a stylet positioned in said stylet guide lumen for longitudinal movement from the port through intervening tissue to a target tissue. The stylet can be an electrical conductor enclosed within a non-conductive layer, the electrical conductor being a radiofrequency electrode. Preferably, the non-conductive layer is a sleeve which is axially movable on the electrical conductor to expose a selected portion of the electrical conductor surface in the target tissue. The stylet can also be a microwave antenna. The stylet can also be a hollow tube for delivering treatment fluid to the target tissue.
    Type: Grant
    Filed: February 5, 1998
    Date of Patent: July 16, 2002
    Assignee: Vidamed, Inc.
    Inventors: Stuart D. Edwards, Ronald G. Lax, Ingemar H. Lundquist, Hugh R. Sharkey
  • Publication number: 20010011161
    Abstract: A medical probe device of this invention comprising a catheter having a control end and a probe end. The probe end includes a stylet guide housing having at least one stylet port and stylet guide means for directing a flexible stylet outward through at least one stylet port and through intervening tissue to targeted tissues. A stylet is positioned in at least one of said stylet guide means, the stylet comprising a non-conductive sleeve having a RF electrode lumen and an optional a fluid supply lumen and a temperature sensor lumen therein. At least one portion of an opposed surface of the electrode lumen and the electrode can be spaced apart to define a liquid supply passageway for delivery of medicament liquid.
    Type: Application
    Filed: March 27, 2001
    Publication date: August 2, 2001
    Applicant: VIDAMED, INC.
    Inventors: Stuart D. Edwards, Hugh R. Sharkey, Ingemar H. Lundquist, Ronald G. Lax, James Allen Baker
  • Patent number: 6241702
    Abstract: A medical device for the treatment by radio frequency ablation of a target volume in tissue of a prostate comprising an elongate probe member having proximal and distal extremities and having a passage therein extending from the proximal extremity to the distal extremity. The elongate probe member is sized so that it can be introduced into the urethra. At least one guide tube having proximal and distal extremities is mounted in the passage of the elongate probe member for nonlongitudinal movement therein. The at least one guide tube has a lumen extending therethrough from the proximal extremity to the distal extremity. A radio frequency conductive electrode is disposed in the lumen. A handle is coupled to the proximal extremity of the elongate probe member and includes a finger actuatable mechanism secured to the radio frequency electrode for advancing and retracting the radio frequency electrode with respect to the at least one guide tube.
    Type: Grant
    Filed: June 9, 1998
    Date of Patent: June 5, 2001
    Assignee: Vidamed, Inc.
    Inventors: Ingemar H. Lundquist, Stuart D. Edwards, Hugh R. Sharkey, Ronald G. Lax, James A. Baker, Jr., Phillip R. Sommer
  • Patent number: 6206847
    Abstract: A medical probe device of this invention comprising a catheter having a control end and a probe end. The probe end includes a stylet guide housing having at least one stylet port and stylet guide means for directing a flexible stylet outward through at least one stylet port and through intervening tissue to targeted tissues. A stylet is positioned in at least one of said stylet guide means, the stylet comprising a non-conductive sleeve having a RF electrode lumen and an optional a fluid supply lumen and a temperature sensor lumen therein. At least one portion of an opposed surface of the electrode lumen and the electrode can be spaced apart to define a liquid supply passageway for delivery of medicament liquid.
    Type: Grant
    Filed: March 17, 1999
    Date of Patent: March 27, 2001
    Assignee: Vidamed, Inc.
    Inventors: Stuart D. Edwards, Hugh R. Sharkey, Ingemar H. Lundquist, Ronald G. Lax, James Allen Baker, Jr.
  • Patent number: 6193714
    Abstract: A medical probe device for introduction by way of a natural body opening into a tubular internal anatomical part of the body includes an elongate member having proximal and distal extremities and a passageway extending from the proximal extremity to the distal extremity along a longitudinal axis, a transparent guide piece mounted on the distal extremity of the elongate member, the transparent guide piece having proximal and distal extremities and a bore therein defining a guide piece lumen extending from the proximal extremity of the guide piece distally at least part way to the distal extremity of the guide piece, the guide piece lumen being in communication with the passageway in the elongate member, an optical viewing element movable within the passageway of the elongate member and having a distal extremity movable within the guide piece lumen, a handle mechanism mounted on the proximal extremity of the elongate member, and a further mechanism carried by the handle for mounting the distal extremity of the
    Type: Grant
    Filed: February 23, 1999
    Date of Patent: February 27, 2001
    Assignee: Vidamed, Inc.
    Inventors: Thomas H. McGaffigan, Jack A. McCullough, Christopher S. Jones, Bryan C. Depetrillo
  • Patent number: 6129726
    Abstract: A medical probe device comprises a catheter having a stylet guide housing with one or more stylet ports in a side wall thereof and a stylet guide for directing a flexible stylet outward through the stylet port and through intervening tissue at a preselected, adjustable angle to a target tissue. The total catheter assembly includes a stylet guide lumen communicating with the stylet port and a stylet positioned in said stylet guide lumen for longitudinal movement from the port through intervening tissue to a target tissue. The stylet can be an electrical conductor enclosed within a non-conductive layer, the electrical conductor being a radiofrequency electrode. Preferably, the non-conductive layer is a sleeve which is axially moveable on the electrical conductor to expose a selected portion of the electrical conductor surface in the target tissue. The stylet can also be a microwave antenna. The stylet can also be a hollow tube for delivering treatment fluid to the target tissue.
    Type: Grant
    Filed: March 17, 1999
    Date of Patent: October 10, 2000
    Assignee: Vidamed, Inc.
    Inventors: Stuart D. Edwards, Ronald G. Lax, Ingemar H. Lundquist, Hugh R. Sharkey
  • Patent number: 6102886
    Abstract: A medical probe for the treatment by radio frequency ablation of tissue in a human comprising an elongate probe member having proximal and distal extremities. The elongate probe member has a longitudinal axis and at least one passage extending from the proximal extremity to the distal extremity. A guide cannula is mounted in the at least one passage of the elongate probe member and has proximal and distal extremities with the distal extremity of the guide cannula being in the vicinity of the distal extremity of the elongate probe member. The guide cannula has an opening in the distal extremity and a lumen extending from the proximal extremity to the opening in the distal extremity. A stylet is slidably disposed in the lumen of the guide cannula and includes a radio frequency electrode having a distal portion and a layer of insulating material disposed around the radio frequency so that at least the distal portion is exposed. A handle is coupled to the proximal extremity of the elongate probe member.
    Type: Grant
    Filed: May 27, 1998
    Date of Patent: August 15, 2000
    Assignee: Vidamed, Inc.
    Inventors: Ingemar H. Lundquist, Stuart D. Edwards