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).
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Patent number: 9907932Abstract: 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: GrantFiled: March 17, 2014Date of Patent: March 6, 2018Assignee: Medtronic Vascular, Inc.Inventors: Joshua Makower, Theodore Lamson, J. Christopher Flaherty, John Reggie, John Chang, Joseph Catanese, David Tholfsen
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Publication number: 20140288414Abstract: 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: ApplicationFiled: March 17, 2014Publication date: September 25, 2014Applicant: Medtronic Vascular, Inc.Inventors: Joshua Makower, Theodore Lamson, Christopher J. Flaherty, John Reggie, John Chang, Joseph Catanese, David Tholfsen
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Patent number: 8672920Abstract: 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: GrantFiled: October 30, 2007Date of Patent: March 18, 2014Assignee: Medtronic Vascular, Inc.Inventors: Joshua Makower, Theodore Lamson, J. Christopher Flaherty, John Reggie, John Chang, Joseph Catanese, David Tholfsen
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Publication number: 20120245539Abstract: 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: ApplicationFiled: November 26, 2010Publication date: September 27, 2012Applicant: QLT INC.Inventors: Sascha K. Zarins, David J. Scott, David Tholfsen
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Patent number: 8090430Abstract: 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: GrantFiled: September 28, 2009Date of Patent: January 3, 2012Assignee: Medtronic Vascular, Inc.Inventors: Joshua Makower, Theodore C. Lamson, J. Christopher Flaherty, John Reggie, John Chang, Joseph Catanese, III, David Tholfsen
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Patent number: 7717115Abstract: 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: GrantFiled: November 25, 2003Date of Patent: May 18, 2010Assignee: Pulmonx CorporationInventors: Michael Barrett, David Tholfsen, Michael Hendricksen, Ronald Hundertmark, John McCutcheon, Antony J. Fields, Jeffery J. Dolin, Robert M. George
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Publication number: 20080091059Abstract: 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: ApplicationFiled: September 21, 2007Publication date: April 17, 2008Inventors: Timothy Machold, David Scott, David Rahdert, David Tholfsen, Robert Chang
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Publication number: 20080091264Abstract: 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: ApplicationFiled: September 21, 2007Publication date: April 17, 2008Inventors: Timothy Machold, Robert Chang, David Rahdert, David Scott, David Tholfsen
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Publication number: 20080058759Abstract: 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: ApplicationFiled: October 30, 2007Publication date: March 6, 2008Applicant: Medtronic Vascular, Inc.Inventors: Joshua Makower, Theodore Lamson, J. Flaherty, John Reggie, John Chang, Joseph Catanese, David Tholfsen
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Publication number: 20080051756Abstract: 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: ApplicationFiled: October 30, 2007Publication date: February 28, 2008Applicant: Medtronic Vascular, Inc.Inventors: Joshua Makower, Theodore Lamson, J. Christopher Flaherty, John Reggie, John Chang, Joseph Catanese, David Tholfsen
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Publication number: 20060106278Abstract: 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: ApplicationFiled: October 21, 2005Publication date: May 18, 2006Inventors: Timothy Machold, David Scott, David Rahdert, David Tholfsen, Robert Chang, John Macoviak
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Publication number: 20060106279Abstract: 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: ApplicationFiled: October 21, 2005Publication date: May 18, 2006Inventors: Timothy Machold, David Scott, David Rahdert, David Tholfsen, Robert Chang, John Macoviak
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Publication number: 20050166925Abstract: 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: ApplicationFiled: March 28, 2005Publication date: August 4, 2005Inventors: Peter Wilson, Antony Fields, Hanson Gifford, John McCutcheon, Michael Hendricksen, Alan Rapacki, David Tholfsen, Michael Barrett, Ronald Hundertmark, Douglas Sutton
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Publication number: 20050145253Abstract: 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: ApplicationFiled: March 2, 2005Publication date: July 7, 2005Inventors: Peter Wilson, Antony Fields, Hanson Gifford, John McCutcheon, Michael Hendricksen, Alan Rapacki, David Tholfsen, Michael Barrett, Ronald Hundertmark, Douglas Sutton
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Publication number: 20050090748Abstract: 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: ApplicationFiled: June 10, 2003Publication date: April 28, 2005Inventors: Joshua Makower, Theodore Lamson, J. Flaherty, John Reggie, John Chang, Joseph Catanese, David Tholfsen
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Publication number: 20040148035Abstract: 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: ApplicationFiled: November 25, 2003Publication date: July 29, 2004Inventors: Michael Barrett, David Tholfsen, Michael Hendricksen, Ronald Hundertmark, John McCutcheon, Antony J. Fields, Jeffery J. Dolin, Robert M. George
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Publication number: 20040039250Abstract: 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: ApplicationFiled: May 28, 2003Publication date: February 26, 2004Inventors: David Tholfsen, Michael Hendricksen, Ronald Hundertmark, Douglas Sutton, Antony Fields