Patents by Inventor Xuan Yen Khieu
Xuan Yen Khieu 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: 20230301714Abstract: An elongate medical device shaft may comprise an elongate body and an annular electrode disposed on the elongate body. The annular electrode may define a longitudinal axis and have an outer diameter. The outer diameter may be greater at an axial center of the electrode than at an axial end of the electrode. Additionally or alternatively, the elongate body may comprise three longitudinal sections having three wall thicknesses. The middle wall thickness may be less than the proximal and distal wall thicknesses and the distal wall thickness may be less than the proximal wall thickness. Additionally or alternatively, the shaft may comprise an inner cylindrical structure and an outer tube. The outer tube may comprise a first radial layer and a second radial layer that is radially-outward of the first radial layer, the first radial layer, second radial layer, and inner structure having different stiffnesses.Type: ApplicationFiled: May 16, 2023Publication date: September 28, 2023Inventors: Zachary L. Helgeson, Alexander C. Houck, John Her, Salo Arias, Somally Mom, Brian M. Monahan, Neil D. Hawkinson, James R. Nigg, James C. Marrs, Xuan Yen Khieu, Troy T. Tegg, Jill A. LaFavor, Israel A. Byrd
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Patent number: 11690670Abstract: An elongate medical device shaft may comprise an elongate body and an annular electrode disposed on the elongate body. The annular electrode may define a longitudinal axis and have an outer diameter. The outer diameter may be greater at an axial center of the electrode than at an axial end of the electrode. Additionally or alternatively, the elongate body may comprise three longitudinal sections having three wall thicknesses. The middle wall thickness may be less than the proximal and distal wall thicknesses and the distal wall thickness may be less than the proximal wall thickness. Additionally or alternatively, the shaft may comprise an inner cylindrical structure and an outer tube. The outer tube may comprise a first radial layer and a second radial layer that is radially-outward of the first radial layer, the first radial layer, second radial layer, and inner structure having different stiffnesses.Type: GrantFiled: June 3, 2021Date of Patent: July 4, 2023Assignee: St. Jude Medical, Cardiology Division, Inc.Inventors: Zachary L. Helgeson, Alexander C. Houck, John Her, Salo Arias, Somally Mom, Brian M. Monahan, Neil D. Hawkinson, James R. Nigg, James C. Marrs, Xuan Yen Khieu, Troy T. Tegg, Jill A. LaFavor, Israel A. Byrd
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Publication number: 20210322095Abstract: A catheter tip is disclosed comprising a tip electrode comprising a ledge feature, and a center cavity and a manifold assembly comprising a fluid lumen manifold and a stop tube. The stop tube can be coupled to the fluid lumen manifold and configured to abut the ledge feature such that a distal end of the fluid lumen manifold extends a pre-determined distance into the center cavity of the tip electrode. The fluid lumen manifold can comprise a plurality of sideholes which can be sized and configured to distribute an irrigant to the tip electrode. The catheter tip can comprise a flexible tip electrode.Type: ApplicationFiled: April 30, 2021Publication date: October 21, 2021Inventors: Daniel Joe Potter, Xuan Yen Khieu, Benjamin Carl Breidall, Andrew Oliverius, Sameer Deviprasad Pai, Troy T. Tegg
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Patent number: 11020177Abstract: A catheter tip is disclosed comprising a tip electrode comprising a ledge feature, and a center cavity and a manifold assembly comprising a fluid lumen manifold and a stop tube. The stop tube can be coupled to the fluid lumen manifold and configured to abut the ledge feature such that a distal end of the fluid lumen manifold extends a pre-determined distance into the center cavity of the tip electrode. The fluid lumen manifold can comprise a plurality of sideholes which can be sized and configured to distribute an irrigant to the tip electrode. The catheter tip can comprise a flexible tip electrode.Type: GrantFiled: November 30, 2017Date of Patent: June 1, 2021Assignee: St. Jude Medical, Cardiology Division, Inc.Inventors: Daniel Joe Potter, Xuan Yen Khieu, Benjamin Carl Breidall, Andrew Oliverius, Sameer Deviprasad Pai, Troy T. Tegg
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Patent number: 10493708Abstract: A method of manufacturing a flexible tubular body for a medical device includes extruding an inner layer from a thermoplastic polymer, pulling it over a mandrel, and tightening it down. If wire lumens were not formed in the inner layer when extruded, polymer spaghetti tubes with wire lumens are laid along the outer surface of the inner layer. Deflection wires are fed into the wire lumens. A wire braid is placed over the inner layer (and spaghetti tubes, if present) and tightened down. The components are encased in an outer polymer layer and a heat shrinkable tube. Pressurized fluid is injected into each wire lumen to maintain the internal diameter thereof greater than the diameter of the deflection wire received therein. Heat is applied to the assembled components, causing the layers to laminate. Once the laminated body has cooled, the heat-shrinkable tube is removed.Type: GrantFiled: September 24, 2012Date of Patent: December 3, 2019Assignee: St. Jude Medical, Atrial Fibrillation Division, Inc.Inventors: Eric John Wilkowske, Allan Manuel Fuentes, Xiaoping Guo, Xuan Yen Khieu, Linda Kay Nemec, Richard E. Stehr
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Publication number: 20190255287Abstract: Various embodiments of the present disclosure can provide an adjustable catheter straightener (102). The adjustable catheter straightener can include a first elongate shaft (104) extending along a shaft longitudinal axis and can include a first shaft proximal end (106) and a first shaft distal end (108). A first shaft inner wall (110) of the first elongate shaft can define a first shaft lumen (112) extending therethrough. A second elongate shaft (114) is disposed within the first shaft lumen extending along the shaft longitudinal axis and comprises a second shaft proximal end and a second shaft distal end. A second shaft inner wall of the second elongate shaft defines a second shaft lumen extending therethrough. The first shaft lumen and the second shaft lumen form a continuous lumen and the first elongate shaft and the second elongate shaft are configured to move longitudinally with respect to one another.Type: ApplicationFiled: October 23, 2017Publication date: August 22, 2019Inventors: Xuan Yen Khieu, John Hong
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Publication number: 20180154069Abstract: A catheter tip is disclosed comprising a tip electrode comprising a ledge feature, and a center cavity and a manifold assembly comprising a fluid lumen manifold and a stop tube. The stop tube can be coupled to the fluid lumen manifold and configured to abut the ledge feature such that a distal end of the fluid lumen manifold extends a pre-determined distance into the center cavity of the tip electrode. The fluid lumen manifold can comprise a plurality of sideholes which can be sized and configured to distribute an irrigant to the tip electrode. The catheter tip can comprise a flexible tip electrode.Type: ApplicationFiled: November 30, 2017Publication date: June 7, 2018Inventors: Daniel Joe Potter, Xuan Yen Khieu, Benjamin Carl Breidall, Andrew Oliverius, Sameer Deviprasad Pai, Troy T. Tegg
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Patent number: 9861738Abstract: A catheter tip is disclosed comprising a tip electrode comprising a ledge feature, and a center cavity and a manifold assembly comprising a fluid lumen manifold and a stop tube. The stop tube can be coupled to the fluid lumen manifold and configured to abut the ledge feature such that a distal end of the fluid lumen manifold extends a pre-determined distance into the center cavity of the tip electrode. The fluid lumen manifold can comprise a plurality of sideholes which can be sized and configured to distribute an irrigant to the tip electrode. The catheter tip can comprise a flexible tip electrode.Type: GrantFiled: March 14, 2014Date of Patent: January 9, 2018Assignee: St. Jude Medical, Cardiology Division, Inc.Inventors: Daniel Joe Potter, Xuan Yen Khieu, Benjamin Carl Breidall, Andrew Oliverius, Sameer Deviprasad Pai, Troy T. Tegg
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Publication number: 20140200441Abstract: A catheter tip is disclosed comprising a tip electrode comprising a ledge feature, and a center cavity and a manifold assembly comprising a fluid lumen manifold and a stop tube. The stop tube can be coupled to the fluid lumen manifold and configured to abut the ledge feature such that a distal end of the fluid lumen manifold extends a pre-determined distance into the center cavity of the tip electrode. The fluid lumen manifold can comprise a plurality of sideholes which can be sized and configured to distribute an irrigant to the tip electrode. The catheter tip can comprise a flexible tip electrode.Type: ApplicationFiled: March 14, 2014Publication date: July 17, 2014Inventors: Daniel Joe Potter, Xuan Yen Khieu, Benjamin Carl Breidall, Andrew Oliverius, Sameer Deviprasad Pai, Troy T. Tegg
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Publication number: 20130300036Abstract: The present invention is a method of manufacturing a flexible tubular body for catheter, sheath or similar medical device. The method comprises pre-extruding an inner layer of the body from a thermoplastic polymer and then pulling the inner layer over a mandrel and tightening the layer down. If wire lumens were not integrally formed in the inner layer when pre-extruded, then two polymer spaghetti tubes, each with wire lumens, are laid 180 degrees apart axially along the outer surface of the inner layer. Deflection wires are then fed into the wire lumens. A cylindrical wire braid is woven or pulled over the inner layer (and the spaghetti tubes, as the case may be) and tightened down. The aforementioned components are then encased in an outer polymer layer. A heat-shrinkable tube is then placed over the outer layer.Type: ApplicationFiled: September 24, 2012Publication date: November 14, 2013Inventors: Eric John Wilkowske, Allan Manuel Fuentes, Xiaoping Guo, Xuan Yen Khieu, Linda Kay Nemec, Richard E. Stehr
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Patent number: 8273285Abstract: The present invention is a method of manufacturing a flexible tubular body for catheter, sheath or similar medical device. The method comprises pre-extruding an inner layer of the body from a thermoplastic polymer and then pulling the inner layer over a mandrel and tightening the layer down. If wire lumens were not integrally formed in the inner layer when pre-extruded, then two polymer spaghetti tubes, each with wire lumens, are laid 180 degrees apart axially along the outer surface of the inner layer. Deflection wires are then fed into the wire lumens. A cylindrical wire braid is woven or pulled over the inner layer (and the spaghetti tubes, as the case may be) and tightened down. The aforementioned components are then encased in an outer polymer layer. A heat-shrinkable tube is then placed over the outer layer.Type: GrantFiled: January 10, 2005Date of Patent: September 25, 2012Assignee: St. Jude Medical, Atrial Fibrillation Division, Inc.Inventors: Eric John Wilkowske, Allan Manuel Fuentes, Xiaoping Guo, Xuan Yen Khieu, Linda Kay Nemec, Richard E. Stehr