Patents by Inventor Kenny L. Dang
Kenny L. Dang 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: 8623003Abstract: A surgical apparatus for welding and severing tissue includes first and second elongated jaws, at least one of the jaws movable with respect to the other, and a first heating element and a second heating element, wherein the first heating element is adapted to weld tissue and the second heating element is adapted to sever tissue.Type: GrantFiled: July 13, 2012Date of Patent: January 7, 2014Assignee: Maquet Cardiovascular LLCInventors: Liming Lau, Arthur M. Lin, Samnuel Ho, Ryan C. Abbott, Kenny L. Dang, Jesse McQuiston, Arnold M. Escano, Jerry Jarrard
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Publication number: 20130018373Abstract: A surgical apparatus and methods for severing and welding tissue, in particular blood vessels. The apparatus includes an elongated shaft having a pair of relatively movable jaws at a distal end thereof. A first heating element on one of the jaws is adapted to heat up to a first temperature and form a welded region within the tissue, while a second heating element on one of the jaws is adapted to heat up to a second temperature and sever the tissue within the welded region. The first and second heating elements may be provided on the same or opposite jaws. A control handle provided on the proximal end of the elongated shaft includes controls for opening and closing the jaws, and may include an actuator for sending current through the first and second heating elements. The first and second heating elements may be electrically connected in series, and the first heating element may be bifurcated such that it conducts about one half of the current as the second heating element.Type: ApplicationFiled: July 13, 2012Publication date: January 17, 2013Inventors: Liming Lau, Arthur M. Lin, Samuel Ho, Ryan C. Abbott, Kenny L. Dang, Jesse McQuiston, Arnold M. Escano, Jerry Jarrard
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Publication number: 20120316550Abstract: A surgical apparatus includes an elongated shaft having a pair of relatively movable jaws at a distal end thereof. A first heating element on one of the jaws is adapted to heat up to a first temperature and form a welded region within the tissue, while a second heating element on one of the jaws is adapted to heat up to a second temperature and sever the tissue within the welded region. The first and second heating elements may be provided on the same or opposite jaws. A control handle provided on the proximal end of the elongated shaft includes controls for opening and closing the jaws, and may include an actuator for sending current through the first and second heating elements. The first and second heating elements may be electrically connected in series.Type: ApplicationFiled: June 12, 2012Publication date: December 13, 2012Inventors: Liming Lau, Arnold M. Escano, Jerry Jarrard, Samuel Ho, Ryan C. Abbott, Arthur M. Lin, Jesse McQuiston, Kenny L. Dang
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Publication number: 20110257643Abstract: A surgical apparatus and methods for severing and welding tissue, in particular blood vessels. The apparatus includes an elongated shaft having a pair of relatively movable jaws at a distal end thereof. A first heating element on one of the jaws is adapted to heat up to a first temperature and form a welded region within the tissue, while a second heating element on one of the jaws is adapted to heat up to a second temperature and sever the tissue within the welded region. The first and second heating elements may be provided on the same or opposite jaws. A control handle provided on the proximal end of the elongated shaft includes controls for opening and closing the jaws, and may include an actuator for sending current through the first and second heating elements. The first and second heating elements may be electrically connected in series, and the first heating element may be bifurcated such that it conducts about one half of the current as the second heating element.Type: ApplicationFiled: March 14, 2011Publication date: October 20, 2011Applicant: MAQUET CARDIOVASCULAR LLCInventors: Liming Lau, Arthur M. Lin, Sam Ho, Ryan C. Abbott, Kenny L. Dang, Jesse McQuiston, Peter L. Callas, Arnold M. Escano, Michael C. Stewart, Jerry Jarrard, Joseph N. Lamberti, Justin N. Williams, Kristopher Yee
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Patent number: 7918848Abstract: A surgical apparatus and methods for severing and welding tissue, in particular blood vessels, include a pair of relatively movable jaws at a distal end of an elongated shaft. A first heating element on one of the jaws is adapted to heat up to a first temperature and form a welded region within the tissue, while a second heating element on one of the jaws is adapted to heat up to a second temperature and sever the tissue within the welded region. A force-limiting mechanism is provided to limit the pressure applied to the tissue by the jaws to ensure that the tissue is severed and the ends effectively welded within a short amount of time.Type: GrantFiled: March 25, 2005Date of Patent: April 5, 2011Assignee: Maquet Cardiovascular, LLCInventors: Liming Lau, Arnold M. Escano, Jerry Jarrard, Sam Ho, Ryan C. Abbott, Arthur M. Lin, Jesse McQuiston, Peter L. Callas, Geoffrey H. Willis, Michael C. Stewart, Kimberly D. Barkman, Joseph N. Lamberti, Kenny L. Dang
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Publication number: 20080306335Abstract: Components for an endoscopic vessel harvesting system suitable for harvesting target vessels such as the saphenous vein or radial artery for cardiac artery bypass graft surgery. The main components of such systems include a vessel dissector and a vessel harvester, both of which work in conjunction with a separately provided endoscope. The vessel dissector is an elongated cannula having a blunt tip for separating layers of facial around vessels. The tip may be movable, and is typically transparent to permit viewing forward of the tip using the endoscope. Internal features of the tip may reduce glare back to the endoscope. Several devices improve visibility through the tip by reducing interference from tissue or fluid on the tip. The vessel harvester also has an elongated cannula for receiving the endoscope. Several tools within the harvester permit manipulation, severing, and sealing of vessels forward of the distal end.Type: ApplicationFiled: June 1, 2006Publication date: December 11, 2008Inventors: Liming Lau, Peter L. Callas, Michael C. Stewart, Geoffrey H. Willis, Ryan C. Abbott, Charles J. Adam, Kimberly D. Barkman, Albert K. Chin, Kenny L. Dang, Joseph N. Lamberti, Arthur M. Lin, Ravi Pamnani
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Patent number: 7118592Abstract: A polymeric material such as polyurethane, PET, or ePTFE is used to cover an intravascular stent. The cover material has an overlapping portion which is slidable upon itself so that when the stent is expanded, the cover material does not contribute to stent foreshortening, if any. The cover material can be provided with holes to permit endothelialization and can be drug loaded to facilitate repair of a damaged vessel.Type: GrantFiled: September 12, 2000Date of Patent: October 10, 2006Assignee: Advanced Cardiovascular Systems, Inc.Inventors: Kenny L. Dang, Han Juanta, Nazanine Matin
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Patent number: 7060093Abstract: An implantable prosthesis, for example a stent, is provided having one or more elements that form the body structure of the prosthesis. The elements have a width that is variable from a nominal or conventional width to an increased width. The elements can have depots formed in the elements and are generally located at the increased width portions of the elements. Substances such as therapeutic substances, polymeric materials, polymeric materials containing therapeutic substances, radioactive isotopes, and radiopaque materials can be deposited into the depots.Type: GrantFiled: May 26, 2004Date of Patent: June 13, 2006Assignee: Advanced Cardiovascular Systems, Inc.Inventors: Kenny L. Dang, Nazanine Matin, Henjen Ho
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Patent number: 6979349Abstract: The present invention provides an improved stent design for repairing a vessel. The stent design incorporates crimpable, short non linear links which are flexible in three dimensions and which include flexible arms. The ability to accommodate both small deformations that occur during delivery and larger deformations that occur upon expansion within the vessel is enhanced without sacrificing stent crimp diameter. The link may incorporate a short flexible link with a perpendicular transition to provide added flexibility.Type: GrantFiled: August 14, 2003Date of Patent: December 27, 2005Assignee: Advanced Cardiovascular Systems, Inc.Inventors: Kenny L. Dang, Andreina Gomez, Su-Wen Ueng
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Publication number: 20040220662Abstract: An implantable prosthesis, for example a stent, is provided having one or more elements that form the body structure of the prosthesis. The elements have a width that is variable from a nominal or conventional width to an increased width. The elements can have depots formed in the elements and are generally located at the increased width portions of the elements. Substances such as therapeutic substances, polymeric materials, polymeric materials containing therapeutic substances, radioactive isotopes, and radiopaque materials can be deposited into the depots.Type: ApplicationFiled: May 26, 2004Publication date: November 4, 2004Inventors: Kenny L. Dang, Nazanine Matin, Henjen Ho
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Patent number: 6758859Abstract: An implantable prosthesis, for example a stent, is provided having one or more elements that form the body structure of the prosthesis. The elements have a width that is variable from a nominal or conventional width to an increased width. Depots are formed in the elements and are generally located at the increased width portions of the elements. The diameter of the depots is based on a percentage of the width of the element. As such, the depots have increased drug-loading capabilities. Substances such as therapeutic substances, polymeric materials, polymeric materials containing therapeutic substances, radioactive isotopes, and radiopaque materials can be deposited into the depots. Further, the variable width of the elements ensures that sufficient material surrounds each depot so as not to compromise the structural integrity of the prosthesis.Type: GrantFiled: October 30, 2000Date of Patent: July 6, 2004Inventors: Kenny L. Dang, Nazanine Matin, Henjen Ho
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Patent number: 6607554Abstract: The present invention provides an improved stent design for repairing a vessel. The stent design incorporates crimpable, short non-linear links which are flexible in three dimensions and which include flexible arms. The ability to accommodate both small deformations that occur during delivery and larger deformations that occur upon expansion within the vessel is enhanced without sacrificing stent crimp diameter. The link may incorporate a short flexible link with a perpendicular transition to provide added flexibility.Type: GrantFiled: June 29, 2001Date of Patent: August 19, 2003Assignee: Advanced Cardiovascular Systems, Inc.Inventors: Kenny L. Dang, Andreina Gomez, Su-Wen Ueng
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Publication number: 20030004566Abstract: The present invention provides an improved stent design for repairing a vessel. The stent design incorporates crimpable, short non-linear links which are flexible in three dimensions and which include flexible arms. The ability to accommodate both small deformations that occur during delivery and larger deformations that occur upon expansion within the vessel is enhanced without sacrificing stent crimp diameter. The link may incorporate a short flexible link with a perpendicular transition to provide added flexibility.Type: ApplicationFiled: June 29, 2001Publication date: January 2, 2003Inventors: Kenny L. Dang, Andreina Gomez, Su-Wen Ueng
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Patent number: 5935162Abstract: Radially-expandable stents are provided with improved longitudinal flexibility and stability, improved torsional flexibility and stability, improved trackability and conformability, and improved hoop strength. The stents combine the advantages typically associated with wire stents with those typically associated longitudinal stability.Type: GrantFiled: March 16, 1998Date of Patent: August 10, 1999Assignee: Medtronic, Inc.Inventor: Kenny L. Dang
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Patent number: 5843168Abstract: A radially expandable stent for implantation within a body vessel, comprising a first and second elongated element having a series of peaks alternating with valleys forming a wave shape therein. The first elongated element is interwoven with the second elongated element in a series of crossovers, with each crossover forming a symmetrical intersection and each successive pair of crossovers defining a loop. The interwoven first and second elongated elements are wound into a hollow cylindrical shape with at least one longitudinal strut extending parallel to a longitudinal axis of the hollow cylindrical shape and passing through at least one of the loops along the hollow cylindrical shape.Type: GrantFiled: March 31, 1997Date of Patent: December 1, 1998Assignee: Medtronic, Inc.Inventor: Kenny L. Dang