Patents by Inventor Christopher J. Geurkink
Christopher J. Geurkink 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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Publication number: 20200305971Abstract: An irrigated ablation catheter includes a shaft and an electrode assembly affixed to a distal end of the shaft. The distal electrode assembly includes a manifold and an ablation electrode affixed together and extending along a center axis. The electrode has a distal irrigation passageway extending therethrough to an opening at a distal tip of the electrode. The opening of the irrigation passageway is offset in distance from the center axis, and allows a thermal sensor such as a thermocouple to be located in a sensor cavity in the electrode on or near the center axis. One variation involves providing a pair of distal irrigation passageways through the electrode where both of the openings of the passageways are offset from the center axis. The thermal sensor in this variation is located in the sensor cavity substantially on the center axis.Type: ApplicationFiled: April 14, 2020Publication date: October 1, 2020Inventors: Huisun Wang, Christopher J. Geurkink
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Patent number: 10653481Abstract: An irrigated ablation catheter includes a shaft and an electrode assembly affixed to a distal end of the shaft. The distal electrode assembly includes a manifold and an ablation electrode affixed together and extending along a center axis. The electrode has a distal irrigation passageway extending therethrough to an opening at a distal tip of the electrode. The opening of the irrigation passageway is offset in distance from the center axis, and allows a thermal sensor such as a thermocouple to be located in a sensor cavity in the electrode on or near the center axis. One variation involves providing a pair of distal irrigation passageways through the electrode where both of the openings of the passageways are offset from the center axis. The thermal sensor in this variation is located in the sensor cavity substantially on the center axis.Type: GrantFiled: September 18, 2018Date of Patent: May 19, 2020Assignee: St. Jude Medical, Atrial Fibrillation Divison, Inc.Inventors: Huisun Wang, Christopher J. Geurkink
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Publication number: 20190083173Abstract: An irrigated ablation catheter includes a shaft and an electrode assembly affixed to a distal end of the shaft. The distal electrode assembly includes a manifold and an ablation electrode affixed together and extending along a center axis. The electrode has a distal irrigation passageway extending therethrough to an opening at a distal tip of the electrode. The opening of the irrigation passageway is offset in distance from the center axis, and allows a thermal sensor such as a thermocouple to be located in a sensor cavity in the electrode on or near the center axis. One variation involves providing a pair of distal irrigation passageways through the electrode where both of the openings of the passageways are offset from the center axis. The thermal sensor in this variation is located in the sensor cavity substantially on the center axis.Type: ApplicationFiled: September 18, 2018Publication date: March 21, 2019Inventors: Huisun Wang, Christopher J. Geurkink
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Patent number: 10105177Abstract: An irrigated ablation catheter includes a shaft and an electrode assembly affixed to a distal end of the shaft. The distal electrode assembly includes a manifold and an ablation electrode affixed together and extending along a center axis. The electrode has a distal irrigation passageway extending therethrough to an opening at a distal tip of the electrode. The opening of the irrigation passageway is offset in distance from the center axis, and allows a thermal sensor such as a thermocouple to be located in a sensor cavity in the electrode on or near the center axis. One variation involves providing a pair of distal irrigation passageways through the electrode where both of the openings of the passageways are offset from the center axis. The thermal sensor in this variation is located in the sensor cavity substantially on the center axis.Type: GrantFiled: December 31, 2008Date of Patent: October 23, 2018Assignee: St. Jude Medical, Atrial Fibrillation Division, Inc.Inventors: Huisun Wang, Christopher J. Geurkink
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Patent number: 9610119Abstract: A method and system for assessing lesion formation in tissue is provided. The system includes an electronic control unit (ECU) configured to acquire magnitudes for a component of a complex impedance between an electrode and tissue, and the power applied to the tissue during lesion formation. The ECU is configured to calculate a value responsive to the complex impedance component and the power. The value is indicative of a predicted lesion depth, a likelihood the lesion has reached a predetermined depth, or a predicted tissue temperature. The method includes acquiring magnitudes for a component of a complex impedance between an electrode and tissue and the power applied during lesion formation. The method includes calculating a value responsive to the complex impedance component and the power, the value being indicative of a predicted lesion depth, a likelihood the lesion has reached a predetermined depth, and/or a predicted tissue temperature.Type: GrantFiled: November 22, 2013Date of Patent: April 4, 2017Assignee: St. Jude Medical, Atrial Fibrillation Division, Inc.Inventors: Jeffrey M. Fish, Israel A. Byrd, Lynn E. Clark, Jeremy D. Dando, Christopher J. Geurkink, Harry A. Puryear, Saurav Paul
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Patent number: 9095349Abstract: A method and system for determining a likelihood of barotrauma occurring in tissue during formation of a lesion therein is provided. The system includes an electronic control unit (ECU). The ECU is configured to acquire at least one value of at least one component of a complex impedance between an electrode and the tissue. The ECU is configured to calculate an index responsive to the at least one value of the at least one complex impedance component. The index is indicative of a likelihood of barotrauma occurring in the tissue. The method comprises acquiring at least one value of at least one component of a complex impedance between an electrode and the tissue. The method comprises calculating an index responsive to the at least one value of the at least one complex impedance component. The calculated index is indicative of a likelihood of barotrauma occurring in the tissue.Type: GrantFiled: December 10, 2010Date of Patent: August 4, 2015Assignee: St. Jude Medical, Atrial Fibrillation Division, Inc.Inventors: Jeffrey M. Fish, Israel A. Byrd, Lynn Gilmour, Jeremy D. Dando, Christopher J. Geurkink, Rohan Lathia, Harry A. Puryear, Valtino X. Afonso, Saurav Paul
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Publication number: 20140194867Abstract: A method and system for assessing lesion formation in tissue is provided. The system includes an electronic control unit (ECU) configured to acquire magnitudes for a component of a complex impedance between an electrode and tissue, and the power applied to the tissue during lesion formation. The ECU is configured to calculate a value responsive to the complex impedance component and the power. The value is indicative of a predicted lesion depth, a likelihood the lesion has reached a predetermined depth, or a predicted tissue temperature. The method includes acquiring magnitudes for a component of a complex impedance between an electrode and tissue and the power applied during lesion formation. The method includes calculating a value responsive to the complex impedance component and the power, the value being indicative of a predicted lesion depth, a likelihood the lesion has reached a predetermined depth, and/or a predicted tissue temperature.Type: ApplicationFiled: November 22, 2013Publication date: July 10, 2014Applicant: St. Jude Medical, Atrial Fibrillation Division, Inc.Inventors: Jeffrey M. Fish, Israel A. Byrd, Lynn E. Clark, Jeremy D. Dando, Christopher J. Geurkink, Harry A. Puryear, Saurav Paul
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Patent number: 8603084Abstract: A method and system for assessing lesion formation in tissue is provided. The system includes an electronic control unit (ECU) configured to acquire magnitudes for a component of a complex impedance between an electrode and tissue, and the power applied to the tissue during lesion formation. The ECU is configured to calculate a value responsive to the complex impedance component and the power. The value is indicative of a predicted lesion depth, a likelihood the lesion has reached a predetermined depth, or a predicted tissue temperature. The method includes acquiring magnitudes for a component of a complex impedance between an electrode and tissue and the power applied during lesion formation. The method includes calculating a value responsive to the complex impedance component and the power, the value being indicative of a predicted lesion depth, a likelihood the lesion has reached a predetermined depth, and/or a predicted tissue temperature.Type: GrantFiled: November 16, 2010Date of Patent: December 10, 2013Assignee: St. Jude Medical, Atrial Fibrillation Division, Inc.Inventors: Jeffrey M. Fish, Israel A. Byrd, Lynn E. Clark, Jeremy D. Dando, Christopher J. Geurkink, Harry A. Puryear, Saurav Paul
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Patent number: 8585697Abstract: Irrigated ablation catheter assemblies and methods of facilitating parallel irrigation fluid flow along irrigated assemblies includes a catheter, an irrigated ablation electrode assembly, a flow member, and a catheter shaft having a fluid lumen. The electrode assembly includes at least one irrigation passageway and a distal portion. The proximal portion can include a proximal member and the distal portion can include a distal member which is connected to the proximal member. The proximal end of the flow member couples to the catheter shaft and the distal end of the flow member is disposed about the proximal portion of the assembly. Fluid flow is guided at least in part by the member and traverses the outer surface of the proximal portion along the outer surface of the distal portion substantially parallel with the longitudinal axis of the electrode assembly.Type: GrantFiled: September 13, 2012Date of Patent: November 19, 2013Assignee: St. Jude Medical, Atrial Fibrillation Division, Inc.Inventors: Huisun Wang, Christopher J. Geurkink, Harry Puryear
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Patent number: 8273082Abstract: The invention relates to irrigated ablation catheter assemblies and methods of facilitating parallel irrigation fluid flow along irrigated assemblies. An irrigated catheter assembly according to an embodiment includes a catheter, an irrigated ablation electrode assembly, and a flow member. The catheter includes a catheter shaft having a fluid lumen. The irrigated ablation electrode assembly includes a proximal portion having at least one irrigation passageway and a distal portion. The proximal portion of the electrode assembly may include a proximal member and the distal portion of the electrode assembly may include a distal member which is connected to the proximal member. The proximal end of the flow member is coupled or connected to the catheter shaft and the distal end of the flow member is disposed about the proximal portion of the electrode assembly.Type: GrantFiled: December 21, 2007Date of Patent: September 25, 2012Assignee: St. Jude Medical, Atrial Fibrillation Division, Inc.Inventors: Huisun Wang, Christopher J. Geurkink, Harry Puryear
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Patent number: 8052684Abstract: Embodiments of the present invention provide an irrigated catheter having irrigation fluid directed at a taper angle generally in parallel with a proximally tapered portion of the tip electrode to provide improved electrode surface cooling. In one embodiment, an irrigated ablation electrode assembly for use with an irrigated catheter device comprises a proximal member having at least one passageway for a fluid with an outlet disposed at an external surface of the proximal member; and a distal member connected with the proximal member and having an external surface, the distal member including an electrode. The external surface of the distal member has a tapered proximal portion narrowing toward the proximal member at a taper angle with respect to a longitudinal axis of the distal member.Type: GrantFiled: November 30, 2007Date of Patent: November 8, 2011Assignee: St. Jude Medical, Atrial Fibrillation Division, Inc.Inventors: Huisun Wang, Christopher J. Geurkink, Harry Puryear
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Publication number: 20110144657Abstract: A method and system for determining a likelihood of barotrauma occurring in tissue during the formation of a lesion therein is provided. The system includes an electronic control unit (ECU). The ECU is configured to acquire at least one value of at least one component of a complex impedance between an electrode and the tissue. The ECU is further configured to calculate an index responsive to the at least one value of the at least one complex impedance component. The index is indicative of a likelihood of barotrauma occurring in the tissue. The method comprises acquiring at least one value of at least one component of a complex impedance between an electrode and the tissue. The method further comprises calculating an index responsive to the at least one value of the at least one complex impedance component. The calculating index is indicative of a likelihood of barotrauma occurring in the tissue.Type: ApplicationFiled: December 10, 2010Publication date: June 16, 2011Inventors: Jeffrey M. Fish, Israel A. Byrd, Lynn E. Clark, Jeremy D. Dando, Christopher J. Geurkink, Rohan Lathia, Harry A. Puryear, Valtino X. Afonso, Saurav Paul
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Publication number: 20110118727Abstract: A method and system for assessing lesion formation in tissue is provided. The system includes an electronic control unit (ECU) configured to acquire magnitudes for a component of a complex impedance between an electrode and tissue, and the power applied to the tissue during lesion formation. The ECU is configured to calculate a value responsive to the complex impedance component and the power. The value is indicative of a predicted lesion depth, a likelihood the lesion has reached a predetermined depth, or a predicted tissue temperature. The method includes acquiring magnitudes for a component of a complex impedance between an electrode and tissue and the power applied during lesion formation. The method includes calculating a value responsive to the complex impedance component and the power, the value being indicative of a predicted lesion depth, a likelihood the lesion has reached a predetermined depth, and/or a predicted tissue temperature.Type: ApplicationFiled: November 16, 2010Publication date: May 19, 2011Inventors: Jeffrey M. Fish, Israel A. Byrd, Lynn E. Clark, Jeremy D. Dando, Christopher J. Geurkink, Harry A. Puryear, Saurav Paul
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Publication number: 20100168729Abstract: An irrigated ablation catheter includes a shaft and an electrode assembly affixed to a distal end of the shaft. The distal electrode assembly includes a manifold and an ablation electrode affixed together and extending along a center axis. The electrode has a distal irrigation passageway extending therethrough to an opening at a distal tip of the electrode. The opening of the irrigation passageway is offset in distance from the center axis, and allows a thermal sensor such as a thermocouple to be located in a sensor cavity in the electrode on or near the center axis. One variation involves providing a pair of distal irrigation passageways through the electrode where both of the openings of the passageways are offset from the center axis. The thermal sensor in this variation is located in the sensor cavity substantially on the center axis.Type: ApplicationFiled: December 31, 2008Publication date: July 1, 2010Inventors: Huisun Wang, Christopher J. Geurkink
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Publication number: 20090163913Abstract: The invention relates to irrigated ablation catheter assemblies and methods of facilitating parallel irrigation fluid flow along irrigated assemblies. An irrigated catheter assembly according to an embodiment includes a catheter, an irrigated ablation electrode assembly, and a flow member. The catheter includes a catheter shaft having a fluid lumen. The irrigated ablation electrode assembly includes a proximal portion having at least one irrigation passageway and a distal portion. The proximal portion of the electrode assembly may include a proximal member and the distal portion of the electrode assembly may include a distal member which is connected to the proximal member. The proximal end of the flow member is coupled or connected to the catheter shaft and the distal end of the flow member is disposed about the proximal portion of the electrode assembly.Type: ApplicationFiled: December 21, 2007Publication date: June 25, 2009Inventors: Huisun WANG, Christopher J. GEURKINK, Harry PURYEAR
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Publication number: 20090143779Abstract: Embodiments of the present invention provide an irrigated catheter having irrigation fluid directed at a taper angle generally in parallel with a proximally tapered portion of the tip electrode to provide improved electrode surface cooling. In one embodiment, an irrigated ablation electrode assembly for use with an irrigated catheter device comprises a proximal member having at least one passageway for a fluid with an outlet disposed at an external surface of the proximal member; and a distal member connected with the proximal member and having an external surface, the distal member including an electrode. The external surface of the distal member has a tapered proximal portion narrowing toward the proximal member at a taper angle with respect to a longitudinal axis of the distal member.Type: ApplicationFiled: November 30, 2007Publication date: June 4, 2009Inventors: Huisun Wang, Christopher J. Geurkink, Harry Puryear