Patents by Inventor David Francischelli

David Francischelli 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).

  • Publication number: 20190038270
    Abstract: A method of surgical dissection of tissue with a dissector comprising: an elongate shaft comprising a proximal portion and a distal portion, wherein the distal portion comprises a plurality of segments that articulate with respect to one another and the plurality of segments includes a distal segment having a distal end; and a handle attached to the proximal portion of the shaft, wherein the handle comprises controls for articulating the plurality of segments of the distal portion of the shaft with respect to one another, comprising the steps of: positioning the distal end of the dissector in a body; advancing the distal end through the body to dissect tissue; and simultaneously articulating the plurality of segments with respect to one another. A method of surgical dissection of tissue and guiding a second device to a desired physiological location with a first device.
    Type: Application
    Filed: October 9, 2018
    Publication date: February 7, 2019
    Applicant: Medtronic, Inc.
    Inventors: Mark Thompson, Darrin Dickerson, Brett S. Bowman, Christopher F. Kelly, William W. Malecki, David Francischelli, Mark Stewart, Thomas Daigle, Douglas Gubbin, David Kim, Paul Rothstein, Adam Podbelski, Christopher Plott, Benjamin K. Yaffe
  • Patent number: 10098618
    Abstract: A method of surgical dissection of tissue with a dissector comprising: an elongate shaft comprising a proximal portion and a distal portion, wherein the distal portion comprises a plurality of segments that articulate with respect to one another and the plurality of segments includes a distal segment having a distal end; and a handle attached to the proximal portion of the shaft, wherein the handle comprises controls for articulating the plurality of segments of the distal portion of the shaft with respect to one another, comprising the steps of: positioning the distal end of the dissector in a body; advancing the distal end through the body to dissect tissue; and simultaneously articulating the plurality of segments with respect to one another. A method of surgical dissection of tissue and guiding a second device to a desired physiological location with a first device.
    Type: Grant
    Filed: January 26, 2007
    Date of Patent: October 16, 2018
    Assignee: Medtronic, Inc.
    Inventors: Mark Thompson, Darrin Dickerson, Brett S. Bowman, Christopher F. Kelly, William W. Malecki, David Francischelli, Mark Stewart, Thomas Daigle, Douglas Gubbin, David Kim, Paul Rothstein, Adam Podbelski, Christopher Plott, Benjamin K. Yaffe
  • Publication number: 20170252097
    Abstract: Device and method for sub-xiphoid ablation of patient tissue. A sub-xiphoid access clamp has a handle, an elongate neck coupled to the handle and first and second opposing jaws. The first and second opposing jaws have first and second opposing relief segments being generally co-planar and concave with respect to one another to form a void therebetween, and first and second opposing elongate ablation elements positioned along the first and second opposing jaws and distal of the first and second opposing relief segments relative to the handle. The first and second opposing jaws are articulate between a closed position and an open position to admit, at least in part, a second portion of tissue of the patient within the void created by the first and second opposing relief segments while the first portion of tissue is positioned between the first and second ablation elements in the closed position.
    Type: Application
    Filed: May 18, 2017
    Publication date: September 7, 2017
    Inventors: Mark Stewart, Thomas Daigle, David Francischelli, John Liddicoat, Paul Rothstein, Steven F. Bolling
  • Patent number: 9554848
    Abstract: An ablation catheter assembly including an elongate catheter body having a proximal portion, a distal portion and a lumen therethrough. A helical structure associated with the catheter distal portion carries a plurality of independently operable electrodes and is transformable between a low-profile configuration wherein a straightening element is positioned in the lumen and an expanded configuration wherein the straightening element is at least partially retracted from the spiral structure. When the helical structure is in the expanded configuration, a laterally offset tip portion extends distally therefrom.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: January 31, 2017
    Assignee: Medtronic, Inc.
    Inventors: Mark T. Stewart, David Francischelli, Rahul Mehra, James Skarda
  • Patent number: 8821488
    Abstract: Device, system and method for ablating tissue of a heart of a patient. The tissue is clamped between a pair of opposing jaws. A portion of the tissue is ablated at a first generally linear position on the tissue by applying ablative energy to two of a plurality of elongate electrodes, each of the two of the plurality of elongate electrodes being coupled in opposing relationship to each other and the pair of opposing jaws, respectively. An effectiveness of the ablation is sensed at a second generally linear position on the tissue with at least one of the plurality of elongate electrodes positioned on one of the pair of opposing jaws. The second linear position on the tissue is laterally distal to the first linear position on the tissue with respect to the atrium of the heart.
    Type: Grant
    Filed: May 13, 2009
    Date of Patent: September 2, 2014
    Assignee: Medtronic, Inc.
    Inventors: Mark Stewart, David Francischelli, Jinback Hong, Sarah Ahlberg
  • Publication number: 20140148805
    Abstract: An ablation catheter assembly including an elongate catheter body having a proximal portion, a distal portion and a lumen therethrough. A helical structure associated with the catheter distal portion carries a plurality of independently operable electrodes and is transformable between a low-profile configuration wherein a straightening element is positioned in the lumen and an expanded configuration wherein the straightening element is at least partially retracted from the spiral structure. When the helical structure is in the expanded configuration, a laterally offset tip portion extends distally therefrom.
    Type: Application
    Filed: November 26, 2013
    Publication date: May 29, 2014
    Applicant: Medtronic, Inc.
    Inventors: Mark T. Stewart, David Francischelli, Rahul Mehra, James Skarda
  • Patent number: 8221411
    Abstract: Cardiac electroporation ablation systems and methods in which pulsed, high voltage energy is delivered to induce electroporation of cells of cardiac tissue followed by cell rupturing. In some embodiments, the delivered energy is biphasic, having a cycle time of not more than 500 microseconds.
    Type: Grant
    Filed: December 9, 2008
    Date of Patent: July 17, 2012
    Assignee: Medtronic, Inc.
    Inventors: David Francischelli, Mark Stewart, Jinback Hong, Vladimir Nikolski, Cushing Hamlen, Daniel Cheek, Matthew Bonner
  • Publication number: 20120123400
    Abstract: System and method for ablating tissue of a heart of a patient. The tissue is characterized, then a predetermined ablation procedure is selected based on the characterization, ablation energy is delivered according to procedure with the ablation device, and a temperature of the tissue and an impedance of the tissue are determined. Delivery of ablation energy is ceased at a time based, at least in part, on when at least one of an accumulated effective temperature of the tissue over time exceeds a thermal dose threshold and an accumulated effective energy of the tissue over time exceeds an effective energy threshold. Else, the ablation energy delivered is modified by adjusting the energy level based, at least in part, on at least one of the temperature being outside of a predetermined temperature range and the impedance being outside of an impedance range.
    Type: Application
    Filed: May 10, 2011
    Publication date: May 17, 2012
    Inventors: David Francischelli, Catherine R. Condie, Jinback Hong
  • Patent number: 7967816
    Abstract: An electrosurgical instrument including an elongated shaft and a non-conductive handle. The shaft defines a proximal section, a distal section, and an internal lumen extending from the proximal section. The distal section forms an electrically conductive tip and defines at least one passage for distributing fluid. Further, the shaft is adapted to be transitionable from a straight state to a first bent state. The shaft is capable of independently maintaining the distinct shapes associated with the straight state and the first bent state. The handle is rigidly coupled to the proximal section of the shaft. With this in mind, an exterior surface of the shaft distal the handle and proximal the distal section is electrically non-conductive. In one preferred embodiment, the shaft is comprised of an elongated electrode body surrounded by an electrical insulator.
    Type: Grant
    Filed: January 25, 2002
    Date of Patent: June 28, 2011
    Assignee: Medtronic, Inc.
    Inventors: Jon Ocel, Roderick Briscoe, David Francischelli, Scott Jahns, James R. Keogh
  • Publication number: 20100280363
    Abstract: The present invention provides devices, instruments, systems, and methods to navigate medical instruments within the thoracic cavity. More specifically, the present invention provides a navigation system comprising medical instruments having electromagnetic tracking functionality and the integration of previously acquired imaging into a user interface of the navigation system.
    Type: Application
    Filed: April 26, 2010
    Publication date: November 4, 2010
    Applicant: Medtronic, Inc.
    Inventors: James Skarda, Mark Stewart, James Keogh, David Francischelli, Kenneth C. Gardeski, Thomas A. Poss, Michael Neidert
  • Publication number: 20100023004
    Abstract: Cardiac electroporation ablation systems and methods in which pulsed, high voltage energy is delivered to induce electroporation of cells of cardiac tissue followed by cell rupturing. In some embodiments, the delivered energy is biphasic, having a cycle time of not more than 500 microseconds.
    Type: Application
    Filed: December 9, 2008
    Publication date: January 28, 2010
    Inventors: David Francischelli, Mark Stewart, Jinback Hong, Vladimir Nikolski, Cushing Hamlen, Daniel Cheek, Matthew Bonner
  • Publication number: 20090299364
    Abstract: An ablation device for ablating tissue having an outer wall and an inner wall, approximately parallel and concentric with said outer wall, defining an inner fluid chamber and an outer low pressure chamber. Each of the outer wall and the inner wall have an edge defining an open face of the fluid chamber and the low pressure chamber. An ablative element is contained within the fluid chamber. A source of low pressure is coupled to the low pressure chamber. When the edge of the outer wall and the edge of the inner wall contact a surface, the ablation device is at least partially secured to the surface by low pressure created in the low pressure chamber by the source of low pressure. The fluid chamber is at least partially fluidly isolated from the low pressure chamber when the ablation device is at least partially secured to the surface.
    Type: Application
    Filed: April 21, 2009
    Publication date: December 3, 2009
    Applicant: Medtronic, Inc.
    Inventors: Kester Batchelor, David Francischelli, Tom Daigle, Dan Haeg, Paul Rothstein, Adam Podbelski, Sarah Ahlberg, Steve Ramberg, Tom Conway
  • Publication number: 20090299365
    Abstract: Device, system and method for ablating tissue of a heart of a patient. The tissue is clamped between a pair of opposing jaws. A portion of the tissue is ablated at a first generally linear position on the tissue by applying ablative energy to two of a plurality of elongate electrodes, each of the two of the plurality of elongate electrodes being coupled in opposing relationship to each other and the pair of opposing jaws, respectively. An effectiveness of the ablation is sensed at a second generally linear position on the tissue with at least one of the plurality of elongate electrodes positioned on one of the pair of opposing jaws. The second linear position on the tissue is laterally distal to the first linear position on the tissue with respect to the atrium of the heart.
    Type: Application
    Filed: May 13, 2009
    Publication date: December 3, 2009
    Applicant: Medtronic , Inc.
    Inventors: Mark Stewart, David Francischelli, Jinback Hong, Sarah Ahlberg
  • Publication number: 20080275439
    Abstract: A system for ablating tissue and electrically interfacing with a heart including an electrosurgical instrument, an energy source, and a controller. The instrument includes a shaft maintaining first and second electrodes at a distal section. The electrodes are electrically isolated from one another. The controller controls delivery of energy from the energy source, and monitors electrical signals at the electrodes. The controller is programmed to operate in a monopolar mode and a bipolar mode. In the monopolar mode, the first and second electrodes are electrically uncoupled, and energy from the energy source is delivered to the first electrode in performing an ablation procedure. In the bipolar mode, first and second electrodes are electrically coupled and serve as opposite polarity poles to apply energy to a tissue target site, detect electrical signals at a tissue target site, or both.
    Type: Application
    Filed: March 26, 2008
    Publication date: November 6, 2008
    Inventors: David Francischelli, Mark Stewart, Daniel Cheek, Brian Ross, Paul Rothstein, Scott Klein, Asif Hameed, Doug Crowe, Kester Batchelor, William Colon
  • Patent number: 7364578
    Abstract: A system and method of making a lesion on living tissue including providing an electrosurgical system, determining a desired lesion depth, selecting a power setting, and applying electrical energy to the living tissue. The system includes an instrument having an electrode at a distal portion thereof, and a power source having multiple available power settings. The power source is electrically connected to the electrode. The step of applying electrical energy includes energizing the electrode at the selected power setting for a recommended energization time period that is determined by reference to predetermined length of time information and based upon the desired lesion depth and the selected power setting. The system preferably further includes a fluid source for irrigating the electrode at an irrigation rate. In this regard, the predetermined length of time information is generated as a function of irrigation rate.
    Type: Grant
    Filed: December 3, 2004
    Date of Patent: April 29, 2008
    Assignee: Medtronic, Inc.
    Inventors: David Francischelli, Rahul Mehra, Alison Lutterman
  • Publication number: 20080071271
    Abstract: A method for ablation in which a portion of atrial tissue around the pulmonary veins of the heart is ablated by a first elongated ablation component and a second elongated ablation component movable relative to the first ablation component and having means for magnetically attracting the first and second components toward one another. The magnetic means draw the first and second components toward one another to compress the atrial tissue therebetween, along the length of the first and second components and thereby position the device for ablation of the tissue.
    Type: Application
    Filed: July 27, 2007
    Publication date: March 20, 2008
    Inventor: David Francischelli
  • Publication number: 20080045898
    Abstract: A trans-septal guide catheter for providing access through the septum separating a first heart chamber from a second heart chamber that includes an elongated guide catheter body extending between guide catheter proximal and distal ends. A distal segment of the guide catheter is adapted to be inserted through the septum to locate the distal segment of the guide catheter within one of the first heart chamber and the second heart chamber. The catheter body encloses a guide catheter lumen adapted to provide access into the one of the first heart chamber and the second heart chamber through a guide catheter lumen proximal end opening and a guide catheter lumen distal end opening. A retention mechanism engages the septum and maintains the distal segment of the guide catheter extending into the one of the first heart chamber and the second heart chamber.
    Type: Application
    Filed: October 24, 2007
    Publication date: February 21, 2008
    Inventors: Mark Stewart, David Francischelli, James Skarda
  • Publication number: 20080039746
    Abstract: A device and method for ablating tissue is disclosed comprising the steps of acquiring an anatomical image of a patient, correlating the image to the patient, guiding an ablating member within the patient while tracking the position of the ablating member in the patient, positioning the ablating member in a desired position to ablate tissue, emitting ablating energy from the ablating member to form an ablated tissue area and removing the ablating member from the patient.
    Type: Application
    Filed: May 25, 2007
    Publication date: February 14, 2008
    Applicant: Medtronic, Inc.
    Inventors: James Hissong, Mark Stewart, David Francischelli, James Keogh, James Skarda, Hotaik Lee, Nadine Smith
  • Publication number: 20080033457
    Abstract: Some embodiments of the invention provide a system for occluding a left atrial appendage of a patient. Some embodiments of the system can include a ring occluder that can be positioned around the left atrial appendage and a ring applicator to position the ring occluder with respect to the left atrial appendage. One embodiment discloses a method of accessing endocardial surfaces of the heart through the atrial appendage. Additional embodiments of the invention provide a clip occluder that can be positioned around the left atrial appendage. A clip applicator can position the clip occluder with respect to the left atrial appendage.
    Type: Application
    Filed: April 19, 2007
    Publication date: February 7, 2008
    Inventors: David Francischelli, Roderick Briscoe, Leonard Leuer, Daniel Haeg, Tom Daigle, David Kim, Mark Stewart, Andrew Olson, Patrick Cloutier, Christopher Smith, Michael Hobday, Tessy Kanayinkal, Douglas Gubbin, Paul Rothstein, Joseph Cardinal, Jessica Foley, Christopher Plott
  • Publication number: 20080015562
    Abstract: A method of applying ablation energy to achieve transmurality including applying ablation energy at a starting power to a tissue site and monitoring the impedance of the tissue site. The power applied to the tissue site can be increased in response to detection of a power plateau or application of a first power for a minimum time according to some embodiments. A power applied to the tissue site can be reduced in response to an increase in impedance according to some embodiments. Transmurality can be indicated in response to a transmurality plateau following a rise in impedance according to some embodiments.
    Type: Application
    Filed: July 20, 2007
    Publication date: January 17, 2008
    Applicant: MEDTRONIC, INC.
    Inventors: Jinback Hong, David Francischelli, Mark Stewart