Patents by Inventor Dan Wittenberger

Dan Wittenberger 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: 20190262056
    Abstract: Devices, systems, and methods for treating pulmonary conditions, such as COPD and asthma, by denervating bronchial tissue using cryoablation. In one embodiment, a device for bronchial denervation comprises: an elongate body having a distal portion and a proximal portion opposite the distal portion; a treatment element at the distal portion of the elongate body; and a first recording electrode located distal to the treatment element and a second recording electrode located proximal to the treatment element, the first and second recording electrodes being configured to record electromyograms. In one embodiment, the device includes a fluid delivery element that is within the treatment element and that has a plurality of orifices aligned with an equatorial portion of the treatment element.
    Type: Application
    Filed: February 22, 2019
    Publication date: August 29, 2019
    Inventors: Zhongping YANG, Linnea R. LENTZ, Rick D. MCVENES, Dan WITTENBERGER
  • Patent number: 10383677
    Abstract: A medical device, including an elongate body having a proximal portion and a distal portion; a shaft at least partially disposed within the elongate body; an expandable element at the distal portion of the elongate body; and a fluid delivery conduit defining a deflectable segment movably coupled to the shaft, the deflectable segment being transitionable from a substantially linear configuration to a substantially curvilinear configuration.
    Type: Grant
    Filed: April 8, 2016
    Date of Patent: August 20, 2019
    Assignee: Medtronic CryoCath LP
    Inventor: Dan Wittenberger
  • Publication number: 20190209230
    Abstract: Systems and methods for controllably variable fluid flow are disclosed that provide the ability to modify the effective cross-sectional area of the fluid delivery conduit available for fluid flow. Accordingly, selective control of these configurations allows fluid flow to be regulated as desired while the fluid delivery pressure remains the same. Additional configurations provided herein allow for the selective manipulation of a footprint or therapeutic pattern achievable with the medical device during a single procedure, negating the need for the removal and insertion of multiple devices to achieve the same variations in treatment geometry or characteristics.
    Type: Application
    Filed: March 15, 2019
    Publication date: July 11, 2019
    Inventors: Regina E. GROVES, Jean-Pierre LALONDE, Timothy G. LASKE, Claudia LUECKGE, Dan WITTENBERGER, Ramin SABBAGHE-KERMANI, Mahmoud KABIR-SERAJ
  • Patent number: 10285748
    Abstract: Systems and methods for controllably variable fluid flow are disclosed that provide the ability to modify the effective cross-sectional area of the fluid delivery conduit available for fluid flow. Accordingly, selective control of these configurations allows fluid flow to be regulated as desired while the fluid delivery pressure remains the same. Additional configurations provided herein allow for the selective manipulation of a footprint or therapeutic pattern achievable with the medical device during a single procedure, negating the need for the removal and insertion of multiple devices to achieve the same variations in treatment geometry or characteristics.
    Type: Grant
    Filed: March 25, 2016
    Date of Patent: May 14, 2019
    Assignee: Medtronic CryoCath LP
    Inventors: Regina E. Groves, Jean-Pierre Lalonde, Timothy G. Laske, Claudia Lueckge, Dan Wittenberger, Ramin Sabbaghe-Kermani, Mahmoud Kabir-Seraj
  • Publication number: 20180235685
    Abstract: The present invention provides a medical system, including a catheter defining an injection lumen, a chamber in fluid communication with the injection lumen, and an exhaust lumen in fluid communication with the chamber; a first temperature sensor positioned in the exhaust lumen proximal to the chamber; a second temperature sensor positioned in the chamber; and a console in electrical communication with the first and second temperature sensors, the controller modifying coolant flow through the medical device based at least in part upon a signal received from the first and second temperature sensor. The system may further include a thermally-conductive element circumscribing a substantial portion of the exhaust lumen proximal to the chamber, where the first temperature sensor is mounted to the thermally-conductive element, and the thermally-conductive element may include at least one of a braid, coil, and band.
    Type: Application
    Filed: March 13, 2018
    Publication date: August 23, 2018
    Inventors: Jean-Pierre LALONDE, Dan WITTENBERGER, Marwan ABBOUD, Constantin Bogdan CIOBOTARU, Ramin SABBAGHE-KERMANI
  • Publication number: 20180214045
    Abstract: A device and system for providing mapping and treatment capabilities without increasing stiffness of the device. An embodiment of a device may include a flexible elongate body and at least one mapping element on the distal portion of the elongate body. Each mapping element may be an area of thermally conductive material, such as metallic nanoparticles, that is embedded within, integrated with, or deposited on the elongate body. The flexibility of the areas of thermally conductive material is at least substantially the same as that of the elongate body so the device may include many electrodes without compromising flexibility and maneuverability of the device. Alternatively, the device may include a treatment element coupled to the elongate body, such as a balloon. The mapping elements may be embedded within, integrated with, or deposited on the balloon and may have at least substantially the same flexibility as that of the balloon.
    Type: Application
    Filed: January 27, 2017
    Publication date: August 2, 2018
    Inventors: Dan WITTENBERGER, Claudia LUECKGE
  • Publication number: 20180199980
    Abstract: A system and method for providing greater control over the temperature of a thermal treatment element of a medical device, enabling an operator to extend a thawing period of a cryoablation procedure. The system may include a fluid flow path that bypasses a subcooler, giving the operator selective control over the temperature of refrigerant delivered to the treatment element and, therefore, treatment element temperature. Additionally or alternatively, the system may include a fluid delivery conduit that is in communication with a liquid refrigerant and a gaseous refrigerant. Adjustment of the ratio of liquid to gaseous refrigerant also offers control over the treatment element temperature. Additionally or alternatively, the system may include one or more valves and/or heating elements in the fluid delivery and recovery conduits to control the treatment element temperature.
    Type: Application
    Filed: March 15, 2018
    Publication date: July 19, 2018
    Inventors: Rachid MAHROUCHE, Dan WITTENBERGER
  • Patent number: 9956024
    Abstract: A system and method for providing greater control over the temperature of a thermal treatment element of a medical device, enabling an operator to extend a thawing period of a cryoablation procedure. The system may include a fluid flow path that bypasses a subcooler, giving the operator selective control over the temperature of refrigerant delivered to the treatment element and, therefore, treatment element temperature. Additionally or alternatively, the system may include a fluid delivery conduit that is in communication with a liquid refrigerant and a gaseous refrigerant. Adjustment of the ratio of liquid to gaseous refrigerant also offers control over the treatment element temperature. Additionally or alternatively, the system may include one or more valves and/or heating elements in the fluid delivery and recovery conduits to control the treatment element temperature.
    Type: Grant
    Filed: July 11, 2014
    Date of Patent: May 1, 2018
    Assignee: Medtronic CryoCath LP
    Inventors: Rachid Mahrouche, Dan Wittenberger
  • Publication number: 20180104006
    Abstract: A medical system, comprising an ablation catheter is disclosed. The ablation catheter includes an elongate shaft with a proximal end, a distal end and a lumen disposed between the proximal end and the distal end. The ablation catheter also includes an expandable element in fluid communication with the lumen, a first temperature sensor operable to measure a first temperature; and a second temperature sensor operable to measure a second temperature. The first temperature sensor and the second temperature sensor are longitudinally separated from each other by at least a portion of the expandable element.
    Type: Application
    Filed: December 14, 2017
    Publication date: April 19, 2018
    Inventors: Dan WITTENBERGER, Rachid MAHROUCHE
  • Patent number: 9936998
    Abstract: The present invention provides a medical system, including a catheter defining an injection lumen, a chamber in fluid communication with the injection lumen, and an exhaust lumen in fluid communication with the chamber; a first temperature sensor positioned in the exhaust lumen proximal to the chamber; a second temperature sensor positioned in the chamber; and a console in electrical communication with the first and second temperature sensors, the controller modifying coolant flow through the medical device based at least in part upon a signal received from the first and second temperature sensor. The system may further include a thermally-conductive element circumscribing a substantial portion of the exhaust lumen proximal to the chamber, where the first temperature sensor is mounted to the thermally-conductive element, and the thermally-conductive element may include at least one of a braid, coil, and band.
    Type: Grant
    Filed: May 7, 2015
    Date of Patent: April 10, 2018
    Assignee: Medtronic CryoCath LP
    Inventors: Jean-Pierre Lalonde, Dan Wittenberger, Marwan Abboud, Constantin Bogdan Ciobotaru, Ramin Sabbaghe-Kermani
  • Patent number: 9931152
    Abstract: A medical device includes a catheter body having a first injection lumen, a second injection lumen, and an exhaust lumen, where the first injection lumen provides a fluid flow rate greater than a fluid flow rate provided by the second injection lumen; an expandable element coupled to the catheter body in fluid communication with the first and second injection lumens; a cryogenic fluid source in fluid communication with the first and second injection lumens; a valve in fluid communication with the first and second injection lumens to selectively allow fluid flow to at least one of the first and second injection lumens; a pressure sensor in fluid communication with an interior defined by the expandable element; and a controller in communication with the pressure sensor programmed to regulate fluid flow through the first injection lumen based at least in part on a signal from the pressure sensor.
    Type: Grant
    Filed: July 27, 2010
    Date of Patent: April 3, 2018
    Assignee: Medtronic CryoCath LP
    Inventors: Dan Wittenberger, Claudia Lueckge, Miriam Lane
  • Publication number: 20180064481
    Abstract: A system and device for cryoablation of tissue that is suitable for use within an MRI environment. The device may include an elongate body, a treatment element at the distal portion of the elongate body, and one or more pull fibers. The pull fibers may be composed of a non-ferromagnetic material, such as a polymer. Likewise, none of the other device components may be composed of a ferromagnetic material. The device may also include at least one fiber optic sensor. The elongate body distal portion may include a distal tip to which the pull fibers are directly coupled. Additionally or alternatively, the elongate body may include one or more pull fiber lumens configured to allow the pull fibers to deflect the distal portion when a pull force is exerted on the pull fibers.
    Type: Application
    Filed: April 24, 2017
    Publication date: March 8, 2018
    Inventors: Nicolas COULOMBE, Ioana DEAC, John B. HORRIGAN, Jean-Pierre LALONDE, Dan WITTENBERGER
  • Publication number: 20180064482
    Abstract: The present invention provides a medical device that may include a catheter body having proximal and distal portions, a fluid injection lumen disposed within elongate body, and a guidewire lumen disposed within the elongate body. A tip portion defining a cavity in fluid communication with the fluid injection lumen may be coupled to the distal end of the guidewire lumen, and an expandable element may be coupled to the distal portion of the catheter body and to the tip portion, such that the expandable element is in fluid communication with the fluid injection lumen. A shaping element may at least partially surround the expandable element, where the shaping element is configurable in a first geometric configuration and a second geometric configuration.
    Type: Application
    Filed: November 9, 2017
    Publication date: March 8, 2018
    Inventors: Dan WITTENBERGER, Marwan ABBOUD, Ioana DEAC
  • Patent number: 9867660
    Abstract: A medical system, comprising an ablation catheter is disclosed. The ablation catheter includes an elongate shaft with a proximal end, a distal end and a lumen disposed between the proximal end and the distal end. The ablation catheter also includes an expandable element in fluid communication with the lumen, a first temperature sensor operable to measure a first temperature; and a second temperature sensor operable to measure a second temperature. The first temperature sensor and the second temperature sensor are longitudinally separated from each other by at least a portion of the expandable element.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: January 16, 2018
    Assignee: Medtronic CryoCath LP
    Inventors: Dan Wittenberger, Rachid Mahrouche
  • Patent number: 9861423
    Abstract: A device, system, and method for enhancing cooling uniformity and efficiency of cryogenic fluids and providing a treatment element the shape of which can be adjusted for multiple purposes. The device may include a balloon catheter and fluid dispersion element, the fluid dispersion element directing the flow of coolant from a fluid injection element the interior wall of the balloon. The method of changing the shape of the treatment element may include retracting and extending a shaft to which the distal neck of a balloon is coupled, so that the balloon goes from a first shape to a second shape.
    Type: Grant
    Filed: November 23, 2015
    Date of Patent: January 9, 2018
    Assignee: Medtronic CryoCath LP
    Inventors: Jean-Pierre Lalonde, Scott W. Davie, Dan Wittenberger
  • Patent number: 9814512
    Abstract: A medical device includes a steering element defining a passage for a guide wire. A fluid injection tube defining a proximal and a distal end is also included, wherein a portion of the fluid injection tube is contoured about a portion of the steering element. A plurality of injection ports may be disposed in the portion of the fluid injection tube contoured about the steering element.
    Type: Grant
    Filed: February 26, 2015
    Date of Patent: November 14, 2017
    Assignee: Medtronic CryoCath LP
    Inventors: Jean-Pierre Lalonde, Marwan Abboud, Teresa Ann Mihalik, Jean-Pierre Desmarais, Dan Wittenberger
  • Patent number: 9814511
    Abstract: The present invention provides a medical device that may include a catheter body having proximal and distal portions, a fluid injection lumen disposed within elongate body, and a guidewire lumen disposed within the elongate body. A tip portion defining a cavity in fluid communication with the fluid injection lumen may be coupled to the distal end of the guidewire lumen, and an expandable element may be coupled to the distal portion of the catheter body and to the tip portion, such that the expandable element is in fluid communication with the fluid injection lumen. A shaping element may at least partially surround the expandable element, where the shaping element is configurable in a first geometric configuration and a second geometric configuration.
    Type: Grant
    Filed: June 28, 2006
    Date of Patent: November 14, 2017
    Assignee: Medtronic CryoCath LP
    Inventors: Dan Wittenberger, Marwan Abboud, Ioana Deac
  • Patent number: 9750555
    Abstract: A method and system for continuously delivering cryotreatment to a treatment device. In one embodiment, the system may include a first PID circuit in the fluid delivery line and a second PID circuit in the fluid return line, and the first and second PID circuits may operate simultaneously to continuously provide coolant to a cryotreatment device during the inflation phase, ablation phase, and warming (or thawing) phase while providing for temperature adjustment. Alternatively, the system may include a bypass line by which coolant may bypass the subcooler system and be delivered to the cryotreatment device at non-ablation temperatures during the inflation phase. During the ablation phase, coolant may flow through the subcooler system.
    Type: Grant
    Filed: April 27, 2015
    Date of Patent: September 5, 2017
    Assignee: Medtronic CryoCath LP
    Inventors: Dan Wittenberger, Rachid Mahrouche
  • Patent number: 9743972
    Abstract: A system, device, and method for the treatment of cardiac arrhythmia by, specifically, cryolipolysis of non-myocardial tissue and cryoablation of myocardial tissue. A system for treating cardiac arrhythmia may include a first thermal treatment device configured for placement within a heart in contact with myocardial tissue, a second thermal treatment device configured for placement in contact with pericardial tissue, an ablation energy source in communication with the first thermal treatment device, and a cooling energy source in communication with the second thermal treatment device, the cooling energy source causing the second thermal treatment device to reach a temperature insufficient for myocardial ablation when the second thermal treatment device is activated.
    Type: Grant
    Filed: July 18, 2014
    Date of Patent: August 29, 2017
    Assignee: Medtronic CryoCath LP
    Inventor: Dan Wittenberger
  • Patent number: 9730755
    Abstract: A system and method for the delivery of a medical device to a treatment location. The device may include an elongate body, the elongate body including a plurality of annular segments and a jacket disposed about the plurality of annular segments and defining an interior space, and a vacuum source in fluid communication with the interior space of the jacket. When a vacuum is applied to the interior space of the jacket, the jacket may constrict about the plurality of annular elements, thereby increasing the frictional forces between the plurality of segments and between the plurality of segments and an inner surface of the jacket.
    Type: Grant
    Filed: January 31, 2014
    Date of Patent: August 15, 2017
    Assignee: Medtronic CryoCath LP
    Inventors: Dan Wittenberger, George D. Mallin, Claudia Lueckge, Mihai-Alexandru Ionescu, Daniel Harvey-Poncelet