Patents by Inventor Marwan Abboud

Marwan Abboud 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: 7794455
    Abstract: The present invention advantageously provides a method and system for cryogenically ablating large areas of tissue within the left atrium. In an exemplary embodiment a cryotherapy device includes a catheter body having a substantially fixed diameter, a proximal end and a distal end; a first lumen for permitting passage of a cooling fluid from the proximal end to the distal end; a second lumen permitting return of the cooling fluid from the distal end to the proximal end; and an ablation element expandable from a first diameter that is substantially the same as the diameter of the catheter body to a second diameter that is at least twice the diameter of the catheter body, the ablation element having a surface portion that conforms to the uneven surface topography of the cardiac tissue. The ablation element can include one or more balloon and/or a flexible element that is deformed by moving the distal end of the catheter toward the proximal end of the catheter.
    Type: Grant
    Filed: April 29, 2005
    Date of Patent: September 14, 2010
    Assignee: Medtronic Cryocath LP
    Inventors: Marwan Abboud, Fredric L. Milder, George Klein
  • Patent number: 7780657
    Abstract: A cryogenic medical system includes a medical device and a console connectable to the medical device at a connection point. The console controls the temperature of the medical device. The console includes a first cooling system directing coolant to the medical device at a first temperature along a coolant supply line and a second cooling system chilling the coolant within the coolant supply line to a temperature below the first temperature before the coolant reaches the connection point.
    Type: Grant
    Filed: February 23, 2007
    Date of Patent: August 24, 2010
    Assignee: Medtronic Cryocath LP
    Inventors: Marwan Abboud, Rachid Mahrouche, Jean-Pierre Lalonde, Dan Wittenberger
  • Publication number: 20100204687
    Abstract: The present invention provides a surgical device including an elongate body defining a fluid flow path therethrough. An expandable element may be coupled to the elongate body and placed in fluid communication with the fluid flow path. Moreover, the surgical device may include a first leak detection element at least partially surrounding a portion of the expandable element, and a second leak detection element may be provided in fluid communication with the fluid flow path. In addition, a console may be provided, where the console may be in communication with the first and second leak detection elements. Further, a supply of cryogenic fluid as well as a vacuum source may be provided in fluid communication with the fluid flow path.
    Type: Application
    Filed: April 26, 2010
    Publication date: August 12, 2010
    Applicant: MEDTRONIC CRYOCATH LP
    Inventors: Marwan ABBOUD, Dan WITTENBERGER
  • Patent number: 7740627
    Abstract: The present invention advantageously provides a method and system for cryogenically ablating large areas of tissue within the left atrium. In an exemplary embodiment a cryotherapy device includes a catheter body, a proximal end and a distal end; a first lumen; a second lumen; and an ablation element expandable from a first diameter to a second diameter, the ablation element having a surface portion that conforms to the uneven surface topography of the cardiac tissue. The ablation element can include one or more deformable balloon and/or flexible elements. The surface of the balloon can further be shaped by regulation of pressure within the one or more balloons. In an exemplary method, a tissue ablation device is provided and tissue in the left atrium is ablated with the device, whereby the ablation is created by freezing tissue.
    Type: Grant
    Filed: January 6, 2006
    Date of Patent: June 22, 2010
    Assignee: Medtronic Cryocath LP
    Inventors: James Gammie, Randy Jordan, Marwan Abboud, Allan Zingeler, Saqib Masroor
  • Patent number: 7727228
    Abstract: A system and method for controlling the inflation, ablation, and deflation of a balloon catheter is provided. The system includes a balloon catheter, a console having a pressurized gas or liquid inflation source, and an umbilical system to deliver pressurized coolant to the balloon catheter. The system comprises a PID (Proportional Integral Derivative) controller or other pressure-sensing device that monitors the amount of pressure and volume within the balloon catheter. During inflation, the pressure and/or volume of fluid within the balloon is maintained at a target amount in order to provide sufficient mechanized pressure against the desired target region. The system limits the inflation pressure such that a safe quantity of gas would be released should a leak occur. If the amount falls below a certain threshold level, gas or fluid egress is presumed and the inflation process is halted.
    Type: Grant
    Filed: March 23, 2004
    Date of Patent: June 1, 2010
    Assignee: Medtronic Cryocath LP
    Inventors: Marwan Abboud, Rachid Mahrouche, Teresa Ann Mihalik, Chadi Harmouche, Eric Monger
  • Patent number: 7716966
    Abstract: The present invention provides a surgical device including an elongate body defining a fluid flow path therethrough. An expandable element may be coupled to the elongate body and placed in fluid communication with the fluid flow path. Moreover, the surgical device may include a first leak detection element at least partially surrounding a portion of the expandable element, and a second leak detection element may be provided in fluid communication with the fluid flow path. In addition, a console may be provided, where the console may be in communication with the first and second leak detection elements. Further, a supply of cryogenic fluid as well as a vacuum source may be provided in fluid communication with the fluid flow path.
    Type: Grant
    Filed: June 28, 2006
    Date of Patent: May 18, 2010
    Assignee: Medtronic Cryocath LP
    Inventors: Marwan Abboud, Dan Wittenberger
  • Publication number: 20100114269
    Abstract: A medical device is provided 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: October 30, 2009
    Publication date: May 6, 2010
    Applicant: MEDTRONIC CRYOCATH LP
    Inventors: Dan WITTENBERGER, Marwan ABBOUD, Iona Alina DEAC
  • Patent number: 7648497
    Abstract: An elongated catheter device with a distal balloon assembly is adapted for endovascular insertion. Coolant injected through the device may, in different embodiments, directly cool tissue contacting the balloon, or may cool a separate internal chamber. In the first case, the coolant also inflates the balloon, and spent coolant is returned to the handle via a return passage extending through the body of the catheter. Plural balloons may be provided, wherein a secondary outer balloon surrounds a primary inner balloon, the primary balloon being filled with coolant and acting as the cooling chamber, the secondary balloon being coupled to a vacuum return lumen to serve as a robust leak containment device and thermal insulator around the cooling chamber. Various configurations, such as surface modification of the balloon interface, or placement of particles, coatings, or expandable meshes or coils in the balloon interface, may be employed to achieve this function.
    Type: Grant
    Filed: October 6, 2005
    Date of Patent: January 19, 2010
    Assignee: Medtronic Cryocath LP
    Inventors: Miriam Lane, Leonilda Capuano, David Holtan, Jean-Pierre Lalonde, Claudia L├╝ckge, Jean-Luc Pageard, Marwan Abboud, Johnny Al Asmar, Abderrahim Benrabah, Ken Chen, John W. Lehmann, Philippe Marchand, Robert Martin, Fredric L. Milder, Daniel Nahon
  • Patent number: 7625369
    Abstract: A method is disclosed for treating heart and vascular tissue with cryotreatment. A medical instrument, such as a catheter is positioned to contact a target region of cardiac tissue such as the epicardial tissue. The instrument or catheter provided includes a cryotreatment element that has thermally-transmissive properties. The cryotreatment element may be a cryochamber for enclosing the flow of a fluid refrigerant therein. The cryotreatment element is disposed at the situs of heart or vascular tissue to be treated, usually by piercing the epicardium sac via an opening in the patient's body. A refrigerant flow within the cryochamber creates endothermic cooling with respect to the targeted heart or vascular tissue, inducing hypothermia and forming iceballs proximate the tissue. The cooling may be reversible and non-permanent, or may be permanent leading to cell death, necrosis, apoptosis and/or surgical excision or ablation of tissue.
    Type: Grant
    Filed: September 25, 2006
    Date of Patent: December 1, 2009
    Assignee: Medtronic Cryocath LP
    Inventors: Marwan Abboud, Dan Wittenberger, Daniel Nahon, Steven G. Arless
  • Publication number: 20090287201
    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: May 16, 2008
    Publication date: November 19, 2009
    Inventors: Jean-Pierre LALONDE, Dan WITTENBERGER, Marwan ABBOUD, Constantin Bogdan CIOBOTARU, Ramin SABBAGHE-KERMANI
  • Patent number: 7591814
    Abstract: A catheter having an extended treatment zone for cooling tissue is provided. The catheter includes an elongate catheter body having a distal tip, and a fluid injection conduit disposed inside the catheter body defining a return lumen therein. The fluid injection conduit further defines two or more injection orifices including a first distal orifice near the distal tip, and a second orifice longitudinally offset along the fluid injection conduit to be less proximate the distal tip than the first orifice. Fluid cryogen flowing through the orifices creates an extended tissue cooling contour about the distal end portion of the catheter. At least one ECG ring electrode is provided about the catheter body near the second orifice. The catheter may thus provide for electrocardiographic mapping of tissue nodes lying transversely between the distal tip and the ECG ring electrode.
    Type: Grant
    Filed: March 29, 2005
    Date of Patent: September 22, 2009
    Assignee: CryoCath Technologies Inc.
    Inventors: Domenic Santoianni, Marwan Abboud, Sean Carroll
  • Publication number: 20090182318
    Abstract: A method of treating tissue is provided, including positioning a portion of a catheter in proximity to cardiac tissue; measuring an impedance value with the catheter; determining a respiratory rate based at least in part on the measured impedance value; and thermally treating the cardiac tissue with the catheter.
    Type: Application
    Filed: January 19, 2009
    Publication date: July 16, 2009
    Applicant: CRYOCATH TECHNOLOGIES INC.
    Inventors: Marwan ABBOUD, Johnny Al ASMAR, Chadi HARMOUCHE
  • Publication number: 20090182319
    Abstract: An elongated catheter device with a distal balloon assembly is adapted for endovascular insertion. Coolant injected through the device may, in different embodiments, directly cool tissue contacting the balloon, or may cool a separate internal chamber. Plural balloons may be provided, wherein a secondary outer balloon surrounds a primary inner balloon, the primary balloon being filled with coolant and acting as the cooling chamber, the secondary balloon being coupled to a vacuum return lumen to serve as a robust leak containment device and thermal insulator around the cooling chamber. One or more sensors may be disposed between the balloons or the vacuum return lumen, to detect leaks and control the flow of fluid through the device. Examples of sensors include pressure and temperature sensors, optical sensors, magnetic flow switches and flow meters.
    Type: Application
    Filed: March 25, 2009
    Publication date: July 16, 2009
    Applicant: CryoCath Technologies Inc.
    Inventors: Miriam Lane, Marwan Abboud, Rachid Mahrouche, Teresa Mihalik
  • Publication number: 20090118723
    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: Application
    Filed: November 12, 2008
    Publication date: May 7, 2009
    Inventors: Jean-Pierre LALONDE, Marwan ABBOUD, Teresa Ann MIHALIK, Jean-Pierre DESMARAIS, Dan WITTENBERGER
  • Patent number: 7527622
    Abstract: An elongated catheter device with a distal balloon assembly is adapted for endovascular insertion. Coolant injected through the device may, in different embodiments, directly cool tissue contacting the balloon, or may cool a separate internal chamber. Plural balloons may be provided, wherein a secondary outer balloon surrounds a primary inner balloon, the primary balloon being filled with coolant and acting as the cooling chamber, the secondary balloon being coupled to a vacuum return lumen to serve as a robust leak containment device and thermal insulator around the cooling chamber. One or more sensors may be disposed between the balloons or the vacuum return lumen, to detect leaks and control the flow of fluid through the device. Examples of sensors include pressure and temperature sensors, optical sensors, magnetic flow switches and flow meters.
    Type: Grant
    Filed: July 8, 2004
    Date of Patent: May 5, 2009
    Assignee: CryoCath Technologies Inc.
    Inventors: Miriam Lane, Marwan Abboud, Rachid Mahrouche, Teresa Mihalik
  • Publication number: 20090088735
    Abstract: A system and method for controlling the inflation, ablation, and deflation of a balloon catheter. The system includes a balloon catheter, a console, a pressurized gas or liquid inflation source, and an umbilical system to deliver pressurized coolant to the balloon catheter. The system may include controller that monitors the amount of pressure and volume within the balloon catheter. During inflation, the pressure and/or volume of fluid within the balloon is maintained at a target amount in order to provide sufficient mechanized pressure against the desired target region. The system limits the inflation pressure such that a safe quantity of gas would be released should a leak occur. If the amount falls below a certain threshold level, gas or fluid egress is presumed and the inflation process is halted.
    Type: Application
    Filed: September 26, 2008
    Publication date: April 2, 2009
    Applicant: CRYOCATH TECHNOLOGIES INC.
    Inventors: Marwan ABBOUD, Rachid MAHROUCHE
  • Publication number: 20090030288
    Abstract: A medical apparatus and system for determining contact assessment includes a catheter having an elongate body having a proximal end, a distal end opposite the proximal end, and defining an injection lumen and an exhaust lumen, an expandable membrane defining a cooling chamber disposed at a point along the elongate body, the cooling chamber in fluid communication with the injection lumen and the exhaust lumen, and a contact assessment element which may be a temperature sensor located proximate the coolant return lumen for measuring an internal temperature of the chamber. The system may include the catheter, a console having a fluid supply, an exhaust path and at least one control mechanism operationally coupled to the temperature sensor for processing a temperature signal received from the temperature sensor. The apparatus and system can also have multiple electrodes to measure and process various impedances to determine contact assessment.
    Type: Application
    Filed: October 3, 2008
    Publication date: January 29, 2009
    Applicant: CRYOCATH TECHNOLOGIES INC.
    Inventors: Marwan Abboud, Teresa Ann Mihalik, Johnny Al Asmar, Chadi Harmouche
  • Patent number: 7465300
    Abstract: A catheter includes a cryoablation tip with an electrically-driven ablation assembly for heating tissue. The cryoablation tip may be implemented with a cooling chamber through which a controllably injected coolant circulates to lower the tip temperature, and having an RF electrode at its distal end. The RF electrode may be operated to warm cryogenically-cooled tissue, or the coolant may be controlled to conductively cool the tissue in coordination with an RF treatment regimen, allowing greater versatility of operation and enhancing the lesion size, speed or placement of multi-lesion treatment or single lesion re-treatment cycles. In one embodiment a microwave energy source operates at a frequency to extend beyond the thermal conduction depth, or to penetrate the cryogenic ice ball and be absorbed in tissue beyond an ice boundary, thus extending the depth and/or width of a single treatment locus.
    Type: Grant
    Filed: September 2, 2005
    Date of Patent: December 16, 2008
    Assignee: Cryocath Technologies Inc.
    Inventors: Steven G. Arless, Fredric L. Milder, Marwan Abboud, Dan Wittenberger, Sean Carroll
  • Publication number: 20080243111
    Abstract: The present invention advantageously provides a method and system for cryogenically ablating large areas of tissue within the left atrium. In an exemplary embodiment a cryotherapy device includes a catheter body, a proximal end and a distal end; a first lumen; a second lumen; and an ablation element expandable from a first diameter to a second diameter, the ablation element having a surface portion that conforms to the uneven surface topography of the cardiac tissue. The ablation element can include one or more deformable balloon and/or flexible elements. The surface of the balloon can further be shaped by regulation of pressure within the one or more balloons. In an exemplary method, a tissue ablation device is provided and tissue in the left atrium is ablated with the device, whereby the ablation is created by freezing tissue.
    Type: Application
    Filed: January 6, 2006
    Publication date: October 2, 2008
    Inventors: James Gammie, Randy Jordan, Marwan Abboud, Allan Zingeler, Saqib Masroor
  • Publication number: 20080221508
    Abstract: The present invention provides a medical device having an elongate body with both a proximal end and a distal end, wherein the elongate body defines an intake lumen and an exhaust lumen. The medical device also has a first pliable element defining a cooling chamber disposed at a point along the elongate body, with the cooling chamber being in fluid communication with the intake lumen and the exhaust lumen. A second pliable element is provided which at least partially encloses the first pliable element, thereby defining a junction between the first and second pliable element. Moreover, a check valve is included which is in fluid communication with the junction between the first pliable element and second pliable element, the valve further being in fluid communication with the exhaust lumen. In addition, the medical device may include sensors or other monitoring means in fluid communication with the junction and the cooling chamber.
    Type: Application
    Filed: May 22, 2008
    Publication date: September 11, 2008
    Applicant: CryoCath Technologies Inc.
    Inventors: Marwan Abboud, Rachid Mahrouche, Teresa Ann Mihalik, Chadi Harmouche, Jean-Luc Pageard, John W. Lehmann