Patents by Inventor Changqing Li
Changqing Li 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: 7950869Abstract: A connection joint (20) is described that is formed by inserting a plastic connector (10) into the end of a silicone tube (14). The connector includes a plurality of barbs (12). A reinforcing agent (16) is placed between each of the barbs (12) of the connector (10). An adhesive (18) is injected between the tube (14), the reinforcing agents (16) and the connector (10). The adhesive (18) is then cured at a predetermined temperature for a predetermined time in order to solidify the connection joint (20).Type: GrantFiled: November 30, 2006Date of Patent: May 31, 2011Assignee: Boston Scientific Scimed, Inc.Inventors: Herbert Alan Sundheimer, Christopher A. Benning, Changqing Li
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Publication number: 20110092912Abstract: A catheter assembly including an internal bolster. According to one embodiment, the catheter assembly includes a medical catheter preferably made of extruded silicone rubber. The catheter is shaped to include a cylindrical wall defining a primary longitudinal bore. A plurality of secondary longitudinal bores are provided in the cylindrical wall, the secondary bores being evenly spaced around the primary bore. The assembly also includes a plurality of identical resilient members collectively forming an anchor at a first end of the catheter. Each resilient member comprises a resilient wire and a protective jacket. Each wire is made of a shape-memory material and is reversibly transformable between a spiral shape, when at rest, and a straightened shape, when forcibly unfurled. One end of each wire is disposed within a secondary bore of the catheter, with the remainder of each wire extending out from the catheter.Type: ApplicationFiled: December 21, 2010Publication date: April 21, 2011Applicant: BOSTON SCIENTIFIC SCIMED, INC.Inventors: Changqing LI, Gene McCALLISTER
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Publication number: 20100318119Abstract: Embodiments of the invention include devices for obtaining tissue including a proximal actuator and a distal assembly having first and second end effectors. The first and second end effectors include the features of at least one element within the inner surface either of the first and second end effectors for aiding in the capture and retention of a targeted tissue sample.Type: ApplicationFiled: June 15, 2010Publication date: December 16, 2010Applicant: Boston Scientific Scimed, Inc.Inventors: Tyler Timberlake, Changqing Li, Otto Anderhub, Douglas M. Bontrager, Gerardo Martin, Robert B. DeVries
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Patent number: 7762960Abstract: Embodiments of the invention include devices for obtaining tissue including a proximal actuator and a distal assembly having first and second end effectors. The first and second end effectors include the features of at least one element within the inner surface either of the first and second end effectors for aiding in the capture and retention of a targeted tissue sample.Type: GrantFiled: May 13, 2005Date of Patent: July 27, 2010Assignee: Boston Scientific Scimed, Inc.Inventors: Tyler Timberlake, Changqing Li, Otto Anderhub, Douglas M. Bontrager, Gerardo Martin, Robert B. DeVries
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Publication number: 20100094212Abstract: A method for percutaneously implanting a medical catheter, such as a gastrostomy feeding tube, and a medical catheter implanting assembly. In one embodiment, the implanting assembly includes a gastrostomy feeding tube, an inner sheath and an outer sheath. The feeding tube has an internal bolster integrally formed at its distal end. The inner sheath includes a bore extending distally from its proximal end to a point prior to its distal end and a transverse window communicating with the bore. The outer sheath includes a proximal end, a distal end and a longitudinal bore. The outer sheath is inserted over the inner sheath, and the feeding tube is inserted into the inner sheath, with the internal bolster being folded and tucked into the window and retained therein by the outer sheath. Movement of the outer sheath relative to the inner sheath to expose the window allows the bolster to decompress.Type: ApplicationFiled: December 17, 2009Publication date: April 15, 2010Applicant: BOSTON SCIENTIFIC SCIMED, INC.Inventors: Patrice A. WESTSTRATE, Boyd A. COLVIN, Changqing LI, Mark L. ADAMS, Donald C. HOVEY, Laurence D. BRENNER
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Patent number: 7654980Abstract: A method for percutaneously implanting a medical catheter, such as a gastrostomy feeding tube, and a medical catheter implanting assembly. In one embodiment, the implanting assembly includes a gastrostomy feeding tube, an inner sheath and an outer sheath. The feeding tube has an internal bolster integrally formed at its distal end. The inner sheath includes a bore extending distally from its proximal end to a point prior to its distal end and a transverse window communicating with the bore. The outer sheath includes a proximal end, a distal end and a longitudinal bore. The outer sheath is inserted over the inner sheath, and the feeding tube is inserted into the inner sheath, with the internal bolster being folded and tucked into the window and retained therein by the outer sheath. Movement of the outer sheath relative to the inner sheath to expose the window allows the bolster to decompress.Type: GrantFiled: May 14, 2004Date of Patent: February 2, 2010Assignee: Boston Scientific Scimed, Inc.Inventors: Patrice A. Weststrate, Boyd A. Colvin, Changqing Li, Mark L. Adams, Donald C. Hovey, Laurence D. Brenner
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Publication number: 20090182272Abstract: A medical catheter assembly including a multi-piece connector. In one embodiment, the medical catheter assembly is a PEG implanting assembly comprising a tubular dilator and a silicone feeding tube having an internal bolster at its rear end. The assembly also comprises a multi-piece connector comprising an inner ring, a fitting and an outer ring. The inner ring has an outer diameter greater than the inner diameter of the feeding tube and is coaxially disposed within the feeding tube by a friction-fit. The fitting comprises a front portion, an intermediate portion and a rear portion, the intermediate portion including a shoulder having an outer diameter greater than the inner diameter of the feeding tube. The front portion of the fitting is inserted through the rear end of the dilator and is secured to the dilator by a plurality of barbs.Type: ApplicationFiled: March 23, 2009Publication date: July 16, 2009Inventors: Changqing Li, Gray Wood, Herbert Alan Sundheimer, Laddvanh Bouphvichith, Patrice A. Weststrate, Laurence D. Brenner
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Patent number: 7507230Abstract: A medical catheter assembly including a multi-piece connector. In one embodiment, the medical catheter assembly is a PEG implanting assembly comprising a tubular dilator and a silicone feeding tube having an internal bolster at its rear end. The assembly also comprises a multi-piece connector comprising an inner ring, a fitting and an outer ring. The inner ring has an outer diameter greater than the inner diameter of the feeding tube and is coaxially disposed within the feeding tube by a friction-fit. The fitting comprises a front portion, an intermediate portion and a rear portion, the intermediate portion including a shoulder having an outer diameter greater than the inner diameter of the feeding tube. The front portion of the fitting is inserted through the rear end of the dilator and is secured to the dilator by a plurality of barbs.Type: GrantFiled: May 16, 2003Date of Patent: March 24, 2009Assignee: Boston Scientific Scimed, Inc.Inventors: Changqing Li, Gary Wood, Herbert Alan Sundheimer, Laddvanh Bouphavichith, Patrice A. Weststrate, Laurence D. Brenner
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Publication number: 20090024091Abstract: A catheter assembly including a medical catheter and an internal bolster. In a preferred embodiment, the catheter is an elongated, tubular structure preferably made of a flexible, biocompatible material. The catheter is shaped to include a generally cylindrical wall terminating in a first end and in a second end, the wall coaxially surrounding and defining a longitudinal bore preferably used to convey fluids, such as food and/or medications, to a patient in need thereof. The internal bolster is an elongated, semi-tubular structure preferably made of a flexible, biocompatible material. The bolster is resiliently and reversibly transformable between a generally planar shape, when at rest, and a straightened shape, when forcibly unfurled. The bolster has an inner end and an outer end, the inner end being generally centrally located.Type: ApplicationFiled: March 29, 2008Publication date: January 22, 2009Inventors: Changqing Li, Ken Brown, Alan Sundheimer, Boyd Colvin
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Publication number: 20080167628Abstract: A push catheter for placement of a biliary stent. The push catheter includes an elongate shaft extending from a hub assembly. The elongate shaft includes a distal segment having a lumen extending therethrough, and a proximal segment having a plurality of lumens extending therethrough. The proximal segment is secured to the distal segment, such that the plurality of lumens of the proximal segment are in association with the lumen of the distal segment. The distal end of the proximal segment may be formed at an oblique angle to the longitudinal axis of the elongate shaft. Additionally, the elongate shaft may include a side port providing access to one or more of the plurality of lumens of the proximal segment.Type: ApplicationFiled: January 5, 2007Publication date: July 10, 2008Applicant: BOSTON SCIENTIFIC SCIMED, INC.Inventors: Changqing Li, James M. Weldon, Christopher A. Benning, Gary A. Jordan
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Publication number: 20070255222Abstract: A catheter assembly including an internal bolster. According to one embodiment, the catheter assembly includes a medical catheter preferably made of extruded silicone rubber. The catheter is shaped to include a cylindrical wall defining a primary longitudinal bore. A plurality of secondary longitudinal bores are provided in the cylindrical wall, the secondary bores being evenly spaced around the primary bore. The assembly also includes a plurality of identical resilient members collectively forming an anchor at a first end of the catheter. Each resilient member comprises a resilient wire and a protective jacket. Each wire is made of a shape-memory material and is reversibly transformable between a spiral shape, when at rest, and a straightened shape, when forcibly unfurled. One end of each wire is disposed within a secondary bore of the catheter, with the remainder of each wire extending out from the catheter.Type: ApplicationFiled: March 27, 2006Publication date: November 1, 2007Inventors: Changqing Li, Gene McCallister
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Publication number: 20070140786Abstract: A connection joint (20) is described that is formed by inserting a plastic connector (10) into the end of a silicone tube (14). The connector includes a plurality of barbs (12). A reinforcing agent (16) is placed between each of the barbs (12) of the connector (10). An adhesive (18) is injected between the tube (14), the reinforcing agents (16) and the connector (10). The adhesive (18) is then cured at a predetermined temperature for a predetermined time in order to solidify the connection joint (20).Type: ApplicationFiled: November 30, 2006Publication date: June 21, 2007Applicant: SCIMED LIFE SYSTEMS, INC.Inventors: Herbert Sundheimer, Christopher Benning, Changqing Li
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Patent number: 7165910Abstract: A connection joint (20) is described that is formed by inserting a plastic connector (10) into the end of a silicone tube (14). The connector includes a plurality of barbs (12). A reinforcing agent (16) is placed between each of the barbs (12) of the connector (10). An adhesive (18) is injected between the tube (14), the reinforcing agents (16) and the connector (10). The adhesive (18) is then cured at a predetermined temperature for a predetermined time in order to solidify the connection joint (20).Type: GrantFiled: September 21, 2004Date of Patent: January 23, 2007Assignee: Scimed Life Systems, Inc.Inventors: Herbert Alan Sundheimer, Christopher A Benning, Changqing Li
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Publication number: 20060258954Abstract: Embodiments of the invention include devices for obtaining tissue including a proximal actuator and a distal assembly having first and second end effectors. The first and second end effectors include the features of at least one element within the inner surface either of the first and second end effectors for aiding in the capture and retention of a targeted tissue sample.Type: ApplicationFiled: May 13, 2005Publication date: November 16, 2006Inventors: Tyler Timberlake, Changqing Li, Otto Anderhub, Douglas Bontrager, Gerardo Martin, Robert DeVries
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Publication number: 20050256455Abstract: A method for percutaneously implanting a medical catheter, such as a gastrostomy feeding tube, and a medical catheter implanting assembly. In one embodiment, the implanting assembly includes a gastrostomy feeding tube, an inner sheath and an outer sheath. The feeding tube has an internal bolster integrally formed at its distal end. The inner sheath includes a bore extending distally from its proximal end to a point prior to its distal end and a transverse window communicating with the bore. The outer sheath includes a proximal end, a distal end and a longitudinal bore. The outer sheath is inserted over the inner sheath, and the feeding tube is inserted into the inner sheath, with the internal bolster being folded and tucked into the window and retained therein by the outer sheath. Movement of the outer sheath relative to the inner sheath to expose the window allows the bolster to decompress.Type: ApplicationFiled: May 14, 2004Publication date: November 17, 2005Inventors: Patrice Weststrate, Boyd Colvin, Changqing Li, Mark Adams, Donald Hovey, Laurence Brenner
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Publication number: 20050036831Abstract: A connection joint (20) is described that is formed by inserting a plastic connector (10) into the end of a silicone tube (14). The connector includes a plurality of barbs (12). A reinforcing agent (16) is placed between each of the barbs (12) of the connector (10). An adhesive (18) is injected between the tube (14), the reinforcing agents (16) and the connector (10). The adhesive (18) is then cured at a predetermined temperature for a predetermined time in order to solidify the connection joint (20).Type: ApplicationFiled: September 21, 2004Publication date: February 17, 2005Applicant: SCIMED Life Systems, Inc.Inventors: Herbert Sundheimer, Christopher Benning, Changqing Li
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Publication number: 20040146341Abstract: A connection joint (20) is described that is formed by inserting a plastic connector (10) into the end of a silicone tube (14). The connector includes a plurality of barbs (12). A reinforcing agent (16) is placed between each of the barbs (12) of the connector (10). An adhesive (18) is injected between the tube (14), the reinforcing agents (16) and the connector (10). The adhesive (18) is then cured at a predetermined temperature for a predetermined time in order to solidify the connection joint (20).Type: ApplicationFiled: January 28, 2003Publication date: July 29, 2004Applicant: SCIMED Life Systems, Inc.Inventors: Herbert Alan Sundheimer, Christopher A. Benning, Changqing Li
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Publication number: 20040044330Abstract: A medical catheter assembly including a multi-piece connector. In one embodiment, the medical catheter assembly is a PEG implanting assembly comprising a tubular dilator and a silicone feeding tube having an internal bolster at its rear end. The assembly also comprises a multi-piece connector comprising an inner ring, a fitting and an outer ring. The inner ring has an outer diameter greater than the inner diameter of the feeding tube and is coaxially disposed within the feeding tube by a friction-fit. The fitting comprises a front portion, an intermediate portion and a rear portion, the intermediate portion including a shoulder having an outer diameter greater than the inner diameter of the feeding tube. The front portion of the fitting is inserted through the rear end of the dilator and is secured to the dilator by a plurality of barbs.Type: ApplicationFiled: May 16, 2003Publication date: March 4, 2004Inventors: Changqing Li, Gary Wood, Herbert Alan Sundheimer, Laddvanh Bouphavichith, Patrice A. Weststrate, Laurence D. Brenner
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Patent number: D490890Type: GrantFiled: May 2, 2003Date of Patent: June 1, 2004Assignee: SciMed Life Systems, Inc.Inventor: Changqing Li