Patents by Inventor David Tholfsen

David Tholfsen 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: 9907932
    Abstract: Methods and apparatus for delivery of substances or apparatus to target sites located outside blood vessels within the body of a human or animal patient. A vessel wall penetrating catheter is inserted into the vasculature, positioned and oriented within a blood vessel near the target extravascular site and a penetrator is advanced from the catheter so as to penetrate outwardly through the wall of the blood vessel in the direction of the target site. Thereafter, a delivery catheter is passed through a lumen of the penetrator to the target site. A desired substance or apparatus is then delivered to or obtained from the target site. In some applications, the penetrator may be retracted into the vessel wall penetrating catheter and the vessel wall penetrating catheter may be removed, leaving the delivery catheter in place for chronic or continuous delivery of substance(s) to and/or obtaining of information or samples from the target site.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: March 6, 2018
    Assignee: Medtronic Vascular, Inc.
    Inventors: Joshua Makower, Theodore Lamson, J. Christopher Flaherty, John Reggie, John Chang, Joseph Catanese, David Tholfsen
  • Publication number: 20140288414
    Abstract: Methods and apparatus for delivery of substances or apparatus to target sites located outside blood vessels within the body of a human or animal patient. A vessel wall penetrating catheter is inserted into the vasculature, positioned and oriented within a blood vessel near the target extravascular site and a penetrator is advanced from the catheter so as to penetrate outwardly through the wall of the blood vessel in the direction of the target site. Thereafter, a delivery catheter is passed through a lumen of the penetrator to the target site. A desired substance or apparatus is then delivered to or obtained from the target site. In some applications, the penetrator may be retracted into the vessel wall penetrating catheter and the vessel wall penetrating catheter may be removed, leaving the delivery catheter in place for chronic or continuous delivery of substance(s) to and/or obtaining of information or samples from the target site.
    Type: Application
    Filed: March 17, 2014
    Publication date: September 25, 2014
    Applicant: Medtronic Vascular, Inc.
    Inventors: Joshua Makower, Theodore Lamson, Christopher J. Flaherty, John Reggie, John Chang, Joseph Catanese, David Tholfsen
  • Patent number: 8672920
    Abstract: Methods and apparatus for delivery of substances or apparatus to target sites located outside blood vessel lumens. A penetrating catheter is inserted into a blood vessel lumen and a penetrator is advanced from the catheter in the direction of the target site. Thereafter, a delivery catheter is passed through a lumen of the penetrator to the target site. A desired substance or apparatus is then delivered to or obtained from the target site. In some applications, the delivery catheter may remain in place for chronic or continuous delivery of substance(s) to and/or obtaining of information or samples from the target site. Alternatively, a delivery catheter having an occlusion member may be advanced into a vein or venule and used to occlude the lumen of the vein or venule during and after injection of a substance such that the substance will not be carried away by normal venous blood flow.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: March 18, 2014
    Assignee: Medtronic Vascular, Inc.
    Inventors: Joshua Makower, Theodore Lamson, J. Christopher Flaherty, John Reggie, John Chang, Joseph Catanese, David Tholfsen
  • Publication number: 20120245539
    Abstract: Lacrimal implants providing secure, wedgable retention within a lacrimal punctum and associated canaliculus of an eye are disclosed. The lacrimal implants can comprise an implant body, including first and second portions, extending from a proximal end of the first portion to a distal end of the second portion. The second portion includes a retention projection. The implant body can also include a cavity longitudinally extending from the proximal end of the first portion toward the second portion, wherein the cavity is shaped and sized to receive an insertable actuator, and wherein the retention projection is configured to bias outward or change orientation when the insertable actuator is seated within the cavity.
    Type: Application
    Filed: November 26, 2010
    Publication date: September 27, 2012
    Applicant: QLT INC.
    Inventors: Sascha K. Zarins, David J. Scott, David Tholfsen
  • Patent number: 8090430
    Abstract: Methods and apparatus for delivery of substances or apparatus to target sites within the body of a human or animal patient. A vessel wall penetrating catheter is inserted into the vasculature, positioned and oriented within a blood vessel near the target extravascular site and a penetrator is advanced from the catheter in the direction of the target site. Thereafter, a delivery catheter is passed through a lumen of the penetrator to the target site. A desired substance or apparatus is then delivered to or obtained from the target site.
    Type: Grant
    Filed: September 28, 2009
    Date of Patent: January 3, 2012
    Assignee: Medtronic Vascular, Inc.
    Inventors: Joshua Makower, Theodore C. Lamson, J. Christopher Flaherty, John Reggie, John Chang, Joseph Catanese, III, David Tholfsen
  • Patent number: 7717115
    Abstract: Disclosed is an apparatus for deploying a bronchial isolation device in a bronchial passageway in a lung of a patient. In one embodiment, the apparatus includes an outer shaft having a distal end. A housing is coupled to the distal end of the outer shaft and configured to receive the bronchial device. An inner shaft is slidably disposed within the outer shaft. A handle is adapted to move the outer shaft relative to both the inner shaft and the handle while the inner shaft remains fixed relative to the handle so as to eject the bronchial isolation device from the housing.
    Type: Grant
    Filed: November 25, 2003
    Date of Patent: May 18, 2010
    Assignee: Pulmonx Corporation
    Inventors: Michael Barrett, David Tholfsen, Michael Hendricksen, Ronald Hundertmark, John McCutcheon, Antony J. Fields, Jeffery J. Dolin, Robert M. George
  • Publication number: 20080091059
    Abstract: Implants or systems of implants and methods apply a selected force vector or a selected combination of force vectors within or across the left atrium, which allow mitral valve leaflets to better coapt. The implants or systems of implants and methods make possible rapid deployment, facile endovascular delivery, and full intra-atrial adjustability and retrievability years after implant. The implants or systems of implants and methods also make use of strong fluoroscopic landmarks. The implants or systems of implants and methods make use of an adjustable implant and a fixed length implant. The implants or systems of implants and methods may also utilize an adjustable bridge stop to secure the implant, and the methods of implantation employ various tools.
    Type: Application
    Filed: September 21, 2007
    Publication date: April 17, 2008
    Inventors: Timothy Machold, David Scott, David Rahdert, David Tholfsen, Robert Chang
  • Publication number: 20080091264
    Abstract: Implants or systems of implants and methods apply a selected force vector or a selected combination of force vectors within or across the left atrium, which allow mitral valve leaflets to better coapt. The implants or systems of implants and methods make possible rapid deployment, facile endovascular delivery, and full intra-atrial retrievability. The implants or systems of implants and methods also make use of strong fluoroscopic landmarks. The implants or systems of implants and methods make use of an adjustable implant and a fixed length implant. The implants or systems of implants and methods may also utilize a bridge stop to secure the implant, and the methods of implantation employ various tools.
    Type: Application
    Filed: September 21, 2007
    Publication date: April 17, 2008
    Inventors: Timothy Machold, Robert Chang, David Rahdert, David Scott, David Tholfsen
  • Publication number: 20080058759
    Abstract: Methods and apparatus for delivery of substances or apparatus to target sites located outside blood vessels within the body of a human or animal patient. A vessel wall penetrating catheter is inserted into the vasculature, positioned and oriented within a blood vessel near the target extravascular site and a penetrator is advanced from the catheter so as to penetrate outwardly through the wall of the blood vessel in the direction of the target site. Thereafter, a delivery catheter is passed through a lumen of the penetrator to the target site. A desired substance or apparatus is then delivered to or obtained from the target site. In some applications, the penetrator may be retracted into the vessel wall penetrating catheter and the vessel wall penetrating catheter may be removed, leaving the delivery catheter in place for chronic or continuous delivery of substance(s) to and/or obtaining of information or samples from the target site.
    Type: Application
    Filed: October 30, 2007
    Publication date: March 6, 2008
    Applicant: Medtronic Vascular, Inc.
    Inventors: Joshua Makower, Theodore Lamson, J. Flaherty, John Reggie, John Chang, Joseph Catanese, David Tholfsen
  • Publication number: 20080051756
    Abstract: Methods and apparatus for delivery of substances or apparatus to target sites located outside blood vessels within the body of a human or animal patient. A vessel wall penetrating catheter is inserted into the vasculature, positioned and oriented within a blood vessel near the target extravascular site and a penetrator is advanced from the catheter so as to penetrate outwardly through the wall of the blood vessel in the direction of the target site. Thereafter, a delivery catheter is passed through a lumen of the penetrator to the target site. A desired substance or apparatus is then delivered to or obtained from the target site. In some applications, the penetrator may be retracted into the vessel wall penetrating catheter and the vessel wall penetrating catheter may be removed, leaving the delivery catheter in place for chronic or continuous delivery of substance(s) to and/or obtaining of information or samples from the target site.
    Type: Application
    Filed: October 30, 2007
    Publication date: February 28, 2008
    Applicant: Medtronic Vascular, Inc.
    Inventors: Joshua Makower, Theodore Lamson, J. Christopher Flaherty, John Reggie, John Chang, Joseph Catanese, David Tholfsen
  • Publication number: 20060106278
    Abstract: Implants or systems of implants and methods apply a selected force vector or a selected combination of force vectors within or across the left atrium, which allow mitral valve leaflets to better coapt. The implants or systems of implants and methods make possible rapid deployment, facile endovascular delivery, and full intra-atrial adjustability and retrievability years after implant. The implants or systems of implants and methods also make use of strong fluoroscopic landmarks. The implants or systems of implants and methods make use of an adjustable implant and a fixed length implant. The implants or systems of implants and methods may also utilize an adjustable bridge stop to secure the implant, and the methods of implantation employ various tools.
    Type: Application
    Filed: October 21, 2005
    Publication date: May 18, 2006
    Inventors: Timothy Machold, David Scott, David Rahdert, David Tholfsen, Robert Chang, John Macoviak
  • Publication number: 20060106279
    Abstract: Implants or systems of implants and methods apply a selected force vector or a selected combination of force vectors within or across the left atrium, which allow mitral valve leaflets to better coapt. The implants or systems of implants and methods make possible rapid deployment, facile endovascular delivery, and full intra-atrial adjustability and retrievability years after implant. The implants or systems of implants and methods also make use of strong fluoroscopic landmarks. The implants or systems of implants and methods make use of an adjustable implant and a fixed length implant. The implants or systems of implants and methods may also utilize an adjustable bridge stop to secure the implant, and the methods of implantation employ various tools.
    Type: Application
    Filed: October 21, 2005
    Publication date: May 18, 2006
    Inventors: Timothy Machold, David Scott, David Rahdert, David Tholfsen, Robert Chang, John Macoviak
  • Publication number: 20050166925
    Abstract: Methods and systems for lung volume reduction of a patient are described. The methods include implanting a flow control device in a bronchial passageway of the lung. The flow control device regulates fluid flow through the bronchial passageway and includes a valve protector that at least partially surrounds a valve member. The valve protector has sufficient rigidity to maintain the shape of the valve member against compression.
    Type: Application
    Filed: March 28, 2005
    Publication date: August 4, 2005
    Inventors: Peter Wilson, Antony Fields, Hanson Gifford, John McCutcheon, Michael Hendricksen, Alan Rapacki, David Tholfsen, Michael Barrett, Ronald Hundertmark, Douglas Sutton
  • Publication number: 20050145253
    Abstract: Methods and systems for lung volume reduction of a patient are described. The methods include implanting a flow control device in a bronchial passageway of the lung. The flow control device regulates fluid flow through the bronchial passageway. A region of the lung is aspirated distal of the flow control device while the patient is inhaling.
    Type: Application
    Filed: March 2, 2005
    Publication date: July 7, 2005
    Inventors: Peter Wilson, Antony Fields, Hanson Gifford, John McCutcheon, Michael Hendricksen, Alan Rapacki, David Tholfsen, Michael Barrett, Ronald Hundertmark, Douglas Sutton
  • Publication number: 20050090748
    Abstract: Methods and apparatus for delivery of substances or apparatus to target sites located outside blood vessels within the body of a human or animal patient. A vessel wall penetrating catheter is inserted into the vasculature, positioned and oriented within a blood vessel near the target extravascular site and a penetrator is advanced from the catheter so as to penetrate outwardly through the wall of the blood vessel in the direction of the target site. Thereafter, a delivery catheter is passed through a lumen of the penetrator to the target site. A desired substance or apparatus is then delivered to or obtained from the target site. In some applications, the penetrator may be retracted into the vessel wall penetrating catheter and the vessel wall penetrating catheter may be removed, leaving the delivery catheter in place for chronic or continuous delivery of substance(s) to and/or obtaining of information or samples from the target site.
    Type: Application
    Filed: June 10, 2003
    Publication date: April 28, 2005
    Inventors: Joshua Makower, Theodore Lamson, J. Flaherty, John Reggie, John Chang, Joseph Catanese, David Tholfsen
  • Publication number: 20040148035
    Abstract: Disclosed is an apparatus for deploying a bronchial isolation device in a bronchial passageway in a lung of a patient. In one embodiment, the apparatus includes an outer shaft having a distal end. A housing is coupled to the distal end of the outer shaft and configured to receive the bronchial device. An inner shaft is slidably disposed within the outer shaft. A handle is adapted to move the outer shaft relative to both the inner shaft and the handle while the inner shaft remains fixed relative to the handle so as to eject the bronchial isolation device from the housing.
    Type: Application
    Filed: November 25, 2003
    Publication date: July 29, 2004
    Inventors: Michael Barrett, David Tholfsen, Michael Hendricksen, Ronald Hundertmark, John McCutcheon, Antony J. Fields, Jeffery J. Dolin, Robert M. George
  • Publication number: 20040039250
    Abstract: Disclosed are method and devices for deploying a guidewire in a lung of a patient. The method comprises removably coupling a distal end of the guidewire to a distal end of a delivery device having an elongated shaft and a lumen extending therethrough. The distal end of the delivery device is delivered through the patient's trachea into a bronchial passageway of the lung so that the distal end of the guidewire is disposed in the bronchial passageway. The delivery device is then removed from the a bronchial passageway while the distal end of the guidewire remains in the bronchial passageway.
    Type: Application
    Filed: May 28, 2003
    Publication date: February 26, 2004
    Inventors: David Tholfsen, Michael Hendricksen, Ronald Hundertmark, Douglas Sutton, Antony Fields