Patents by Inventor Sumita Bhola
Sumita Bhola 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: 8571626Abstract: Catheters and methods for obtaining monophasic action potential (“MAP”) electrograms include a flexible catheter body defining a longitudinal axis, and a distal assembly affixed to the catheter body distal end defining a distal tip. The distal assembly has at least three MAP recording electrodes, and at least one reference electrode for determining reference potential. The recording electrodes are each positioned a radial distance from the longitudinal axis in at least three different radial directions, defining a recording geometry substantially having radial symmetry. The reference electrode is a longitudinal distance from the recording geometry. Optional features include a steerable catheter shaft, one or more radio-frequency ablation electrodes, and a dedicated pacing electrode. Different possible embodiments include a dome housing having the recording electrodes in a fixed spatial arrangement, and a distal loop assembly having an array of electrodes on at least three flexible loop elements.Type: GrantFiled: September 5, 2012Date of Patent: October 29, 2013Assignee: Medtronic Ablation Frontiers LLCInventors: Michael Lau, Randell L. Werneth, Timothy J. Corvi, Sumita Bhola, Mark T. Stewart, Michel Haissaguerre, Meleze Hocini
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Patent number: 8565851Abstract: Catheters and methods for obtaining monophasic action potential (“MAP”) electrograms include a flexible catheter body defining a longitudinal axis, and a distal assembly affixed to the catheter body distal end defining a distal tip. The distal assembly has at least three MAP recording electrodes, and at least one reference electrode for determining reference potential. The recording electrodes are each positioned a radial distance from the longitudinal axis in at least three different radial directions, defining a recording geometry substantially having radial symmetry. The reference electrode is a longitudinal distance from the recording geometry. Optional features include a steerable catheter shaft, one or more radio-frequency ablation electrodes, and a dedicated pacing electrode. Different possible embodiments include a dome housing having the recording electrodes in a fixed spatial arrangement, and a distal loop assembly having an array of electrodes on at least three flexible loop elements.Type: GrantFiled: July 31, 2009Date of Patent: October 22, 2013Assignee: Medtronic Ablation Frontiers LLCInventors: Michael Lau, Randell Werneth, Timothy J. Corvi, Sumita Bhola, Mark T. Stewart, Michel Haïssaguerre, Meleze Hocini
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Publication number: 20130006082Abstract: Catheters and methods for obtaining monophasic action potential (“MAP”) electrograms include a flexible catheter body defining a longitudinal axis, and a distal assembly affixed to the catheter body distal end defining a distal tip. The distal assembly has at least three MAP recording electrodes, and at least one reference electrode for determining reference potential. The recording electrodes are each positioned a radial distance from the longitudinal axis in at least three different radial directions, defining a recording geometry substantially having radial symmetry. The reference electrode is a longitudinal distance from the recording geometry. Optional features include a steerable catheter shaft, one or more radio-frequency ablation electrodes, and a dedicated pacing electrode. Different possible embodiments include a dome housing having the recording electrodes in a fixed spatial arrangement, and a distal loop assembly having an array of electrodes on at least three flexible loop elements.Type: ApplicationFiled: September 5, 2012Publication date: January 3, 2013Applicant: MEDTRONIC ABLATION FRONTIERS LLCInventors: Michael LAU, Randell WERNETH, Timothy J. CORVI, Sumita BHOLA, Mark T. STEWART, Michel HAISSAGUERRE, Meleze HOCINI
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Patent number: 8280477Abstract: Catheters and methods for obtaining monophasic action potential (“MAP”) electrograms include a flexible catheter body defining a longitudinal axis, and a distal assembly affixed to the catheter body distal end defining a distal tip. The distal assembly has at least three MAP recording electrodes, and at least one reference electrode for determining reference potential. The recording electrodes are each positioned a radial distance from the longitudinal axis in at least three different radial directions, defining a recording geometry substantially having radial symmetry. The reference electrode is a longitudinal distance from the recording geometry. Optional features include a steerable catheter shaft, one or more radio-frequency ablation electrodes, and a dedicated pacing electrode. Different possible embodiments include a dome housing having the recording electrodes in a fixed spatial arrangement, and a distal loop assembly having an array of electrodes on at least three flexible loop elements.Type: GrantFiled: July 29, 2009Date of Patent: October 2, 2012Assignee: Medtronic Cryocath LPInventors: Michael Lau, Randell Werneth, Timothy J. Corvi, Sumita Bhola, Mark T. Stewart, Michel Haïssaguerre, Meleze Hocini
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Publication number: 20110028820Abstract: Catheters and methods for obtaining monophasic action potential (“MAP”) electrograms include a flexible catheter body defining a longitudinal axis, and a distal assembly affixed to the catheter body distal end defining a distal tip. The distal assembly has at least three MAP recording electrodes, and at least one reference electrode for determining reference potential. The recording electrodes are each positioned a radial distance from the longitudinal axis in at least three different radial directions, defining a recording geometry substantially having radial symmetry. The reference electrode is a longitudinal distance from the recording geometry. Optional features include a steerable catheter shaft, one or more radio-frequency ablation electrodes, and a dedicated pacing electrode. Different possible embodiments include a dome housing having the recording electrodes in a fixed spatial arrangement, and a distal loop assembly having an array of electrodes on at least three flexible loop elements.Type: ApplicationFiled: July 29, 2009Publication date: February 3, 2011Inventors: Michael LAU, Randell WERNETH, Timothy J. CORVI, Sumita BHOLA, Mark T. STEWART
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Publication number: 20110028966Abstract: Catheters and methods for obtaining monophasic action potential (“MAP”) electrograms include a flexible catheter body defining a longitudinal axis, and a distal assembly affixed to the catheter body distal end defining a distal tip. The distal assembly has at least three MAP recording electrodes, and at least one reference electrode for determining reference potential. The recording electrodes are each positioned a radial distance from the longitudinal axis in at least three different radial directions, defining a recording geometry substantially having radial symmetry. The reference electrode is a longitudinal distance from the recording geometry. Optional features include a steerable catheter shaft, one or more radio-frequency ablation electrodes, and a dedicated pacing electrode. Different possible embodiments include a dome housing having the recording electrodes in a fixed spatial arrangement, and a distal loop assembly having an array of electrodes on at least three flexible loop elements.Type: ApplicationFiled: July 31, 2009Publication date: February 3, 2011Inventors: Michael LAU, Randell WERNETH, Timothy J. CORVI, Sumita BHOLA, Mark T. STEWART
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Patent number: 7655005Abstract: The present invention involves a surgical device and method of use, particularly an assembly and method incorporating dual expandable members along the distal region of an ablation device to facilitate ablation of a circumferential region of tissue engaged by the expandable member. The ablation device assembly includes an elongate body with a proximal end portion, a distal end portion, and a longitudinal axis. A first expansion element is located along the distal end portion of the elongate body, and is fluidly coupled to a first source of inflation fluid. A second expansion element having a circumferential wall is located along the distal end portion proximal the first expansion element, and is fluidly coupled to a second source of inflation fluid.Type: GrantFiled: December 23, 2004Date of Patent: February 2, 2010Assignee: Biosense Webster, Inc.Inventor: Sumita Bhola
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Publication number: 20050171527Abstract: The present invention involves a surgical device and method of use, particularly an assembly and method incorporating a peanut or barbell shaped expandable member along the distal region of an ablation device to facilitate ablation of a circumferential region of tissue engaged by the expandable member. The ablation device assembly includes an elongate body with a proximal end portion, a distal end portion, and a longitudinal axis. A contact member is located along the distal end portion of the elongate body. The contact member has a circumferential wall and is expandable from a radially collapsed condition to a radially expanded condition. The contact member also includes a single chamber having first and second bulbous sections separated by a longitudinal mid-section, wherein the first bulbous section has a smaller outside diameter than the second bulbous section when the contact member is in the expanded condition.Type: ApplicationFiled: December 23, 2004Publication date: August 4, 2005Inventor: Sumita Bhola
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Publication number: 20050165388Abstract: The present invention involves a surgical device and method of use, particularly an assembly and method incorporating dual expandable members along the distal region of an ablation device to facilitate ablation of a circumferential region of tissue engaged by the expandable member. The ablation device assembly includes an elongate body with a proximal end portion, a distal end portion, and a longitudinal axis. A first expansion element is located along the distal end portion of the elongate body, and is fluidly coupled to a first source of inflation fluid. A second expansion element having a circumferential wall is located along the distal end portion proximal the first expansion element, and is fluidly coupled to a second source of inflation fluid.Type: ApplicationFiled: December 23, 2004Publication date: July 28, 2005Inventor: Sumita Bhola