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).
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Patent number: 7591814Abstract: 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: GrantFiled: March 29, 2005Date of Patent: September 22, 2009Assignee: CryoCath Technologies Inc.Inventors: Domenic Santoianni, Marwan Abboud, Sean Carroll
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Publication number: 20090182319Abstract: 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: ApplicationFiled: March 25, 2009Publication date: July 16, 2009Applicant: CryoCath Technologies Inc.Inventors: Miriam Lane, Marwan Abboud, Rachid Mahrouche, Teresa Mihalik
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Publication number: 20090182318Abstract: 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: ApplicationFiled: January 19, 2009Publication date: July 16, 2009Applicant: CRYOCATH TECHNOLOGIES INC.Inventors: Marwan ABBOUD, Johnny Al ASMAR, Chadi HARMOUCHE
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Publication number: 20090118723Abstract: 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: ApplicationFiled: November 12, 2008Publication date: May 7, 2009Inventors: Jean-Pierre LALONDE, Marwan ABBOUD, Teresa Ann MIHALIK, Jean-Pierre DESMARAIS, Dan WITTENBERGER
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Patent number: 7527622Abstract: 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: GrantFiled: July 8, 2004Date of Patent: May 5, 2009Assignee: CryoCath Technologies Inc.Inventors: Miriam Lane, Marwan Abboud, Rachid Mahrouche, Teresa Mihalik
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Publication number: 20090088735Abstract: 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: ApplicationFiled: September 26, 2008Publication date: April 2, 2009Applicant: CRYOCATH TECHNOLOGIES INC.Inventors: Marwan ABBOUD, Rachid MAHROUCHE
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Publication number: 20090030288Abstract: 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: ApplicationFiled: October 3, 2008Publication date: January 29, 2009Applicant: CRYOCATH TECHNOLOGIES INC.Inventors: Marwan Abboud, Teresa Ann Mihalik, Johnny Al Asmar, Chadi Harmouche
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Patent number: 7465300Abstract: 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: GrantFiled: September 2, 2005Date of Patent: December 16, 2008Assignee: Cryocath Technologies Inc.Inventors: Steven G. Arless, Fredric L. Milder, Marwan Abboud, Dan Wittenberger, Sean Carroll
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Publication number: 20080243111Abstract: 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: ApplicationFiled: January 6, 2006Publication date: October 2, 2008Inventors: James Gammie, Randy Jordan, Marwan Abboud, Allan Zingeler, Saqib Masroor
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Publication number: 20080221508Abstract: 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: ApplicationFiled: May 22, 2008Publication date: September 11, 2008Applicant: CryoCath Technologies Inc.Inventors: Marwan Abboud, Rachid Mahrouche, Teresa Ann Mihalik, Chadi Harmouche, Jean-Luc Pageard, John W. Lehmann
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Publication number: 20080215043Abstract: 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: ApplicationFiled: May 14, 2008Publication date: September 4, 2008Applicant: CryoCath Technologies Inc.Inventors: Marwan Abboud, Fredric L. Milder, George Klein
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Publication number: 20080200828Abstract: Methods and systems for detecting fluid egress, assessing lesion quality, determining tissue composition or structure, determining ice coverage of catheter tip and providing tissue contact assessment, by providing a catheter having a shaft with a proximal end portion and a distal end portion, the proximal end portion and the distal end portion define at least one fluid pathway therebetween with the shaft having a plurality of electrodes, positioning the catheter at a tissue treatment site, applying an electrical current between at least two of the plurality of electrodes, measuring impedance voltage between the at least two of the plurality of electrodes and, processing the measured impedance voltage caused by the applied electrical current to determine if fluid egress is present, to assess lesion quality, to determine tissue composition, ice cover of catheter tip, and to provide contact assessment.Type: ApplicationFiled: April 25, 2008Publication date: August 21, 2008Applicant: CRYOCATH TECHNOLOGIES INC.Inventors: Marwan ABBOUD, Johnny AL ASMAR, Chadi HARMOUCHE
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Publication number: 20080200829Abstract: Methods and systems for detecting fluid egress, assessing lesion quality, determining tissue composition or structure, determining ice coverage of catheter tip and providing tissue contact assessment, by providing a catheter having a shaft with a proximal end portion and a distal end portion, the proximal end portion and the distal end portion define at least one fluid pathway therebetween with the shaft having a plurality of electrodes, positioning the catheter at a tissue treatment site, applying an electrical current between at least two of the plurality of electrodes, measuring impedance voltage between the at least two of the plurality of electrodes and, processing the measured impedance voltage caused by the applied electrical current to determine if fluid egress is present, to assess lesion quality, to determine tissue composition, ice cover of catheter tip, and to provide contact assessment.Type: ApplicationFiled: April 25, 2008Publication date: August 21, 2008Applicant: CryoCath Technologies Inc.Inventors: Marwan Abboud, Johnny Al Asmar, Chadi Harmouche
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Patent number: 7404816Abstract: A surgical device includes a device body defining a sealed fluid path having a first end and a second end, a refrigerant supply in communication with the first end of the sealed fluid path, and a vacuum source in communication with the second end of the sealed fluid path. Leak detection apparatus can be provided in communication with the sealed fluid path.Type: GrantFiled: July 12, 2004Date of Patent: July 29, 2008Assignee: Cryocath Technologies Inc.Inventors: Marwan Abboud, Johnny Al Asmar, John W. Lehmann
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Publication number: 20080114345Abstract: 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 retreatment 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: ApplicationFiled: January 9, 2008Publication date: May 15, 2008Applicant: CRYOCATH TECHNOLOGIES INC.Inventors: Steven Arless, Fredric Milder, Marwan Abboud, Dan Wittenberger, Sean Carroll
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Publication number: 20080103493Abstract: 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: ApplicationFiled: January 4, 2008Publication date: May 1, 2008Applicant: CRYOCATH TECHNOLOGIES INC.Inventors: Marwan ABBOUD, Fredric MILDER, George KLEIN
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Publication number: 20080091180Abstract: 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: ApplicationFiled: December 10, 2007Publication date: April 17, 2008Applicant: CRYOCATH TECHNOLOGIES INC.Inventors: Marwan ABBOUD, Fredric MILDER, George KLEIN
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Publication number: 20080077124Abstract: A coolant system for a cryoablation or treatment probe such as a mapping or ablation catheter, or a treatment wand, includes a compressor and condenser having a low pressure inlet side and a high pressure outlet side, wherein the outlet side passes through a heat exchanger and is cooled by the inlet side and conditioned for injection to a catheter inlet. A vacuum return system connectable to the catheter outlet draws thermally expended coolant from the catheter and returns it to the low pressure inlet side. A motorized pressure regulator between the heat exchanger and the catheter inlet determines the pressure of coolant passing into the catheter and thus regulates the cooling rate for a selected mapping or ablation regimen. The low pressure compressor inlet supply preferentially conditions the pressurized coolant to ambient temperature or lower before injection into the catheter, allowing the coolant to travel through the body at ambient before expansion in the tip.Type: ApplicationFiled: November 30, 2007Publication date: March 27, 2008Applicant: CRYOCATH TECHNOLOGIES INC.Inventors: Jean-Pierre LALONDE, Marwan ABBOUD
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Patent number: 7347856Abstract: A medical device is provided having a means for actuating a pair of opposing jaw members. The jaw members are movable relative to one another from a first position, wherein the jaw members are disposed in a spaced apart relation relative to one another, to a second position, wherein the jaw members cooperate to grasp tissue therebetween. An ablation tool is connected to at least one of the jaws members, such that the jaw members are capable of conducting ablation energy through the tissue grasped therebetween.Type: GrantFiled: July 13, 2004Date of Patent: March 25, 2008Assignee: Cryocath Technologies Inc.Inventors: Dan Wittenberger, Cristian Petre, Daniel Nahon, RĂ©al Ste-Marie, Marwan Abboud
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Publication number: 20080039791Abstract: 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: ApplicationFiled: October 18, 2007Publication date: February 14, 2008Applicant: CryoCath Technologies Inc.Inventors: Marwan Abboud, Rachid MAHROUCHE, Chadi HARMOUCHE, Teresa MIHALIK, Gilles DESROCHERS