Patents by Inventor David F. Leighton
David F. Leighton 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: 6770066Abstract: Multi-lumen catheters are intended for advancement through the accessory channel on endoscope into a body passage into the gastrointestinal system. The catheters have two or more independent lumens extending continuously to ports at the distal tip for injection of a contrast medium simultaneously with a guide wire for ERCP procedures and for passage of accessories such as visualization devices, polypectomy snares, cytology brushes, papillotomes and stone baskets for catheterization, diagnosis and treatment within the biliary tract. Use of balloons for maintaining a catheter in fixed position in the biliary tract and for dilatation is also disclosed. The catheters employed are extrusions of a resin comprised of nylon and PEBA. The catheters may also be extruded from polyurethane. Multi-lumen catheters having a reduced diameter distal tip portion on which a dilatation balloon is located are also disclosed. The reduced diameter distal tip portion may serve as a platform for support of a stent.Type: GrantFiled: July 5, 2000Date of Patent: August 3, 2004Assignee: Ballard Medical ProductsInventors: George W. Weaver, Harold Jacob, David F. Leighton, Damond C. Holsinger
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Patent number: 5843028Abstract: Multi-lumen catheters are intended for advancement through the accessory channel on endoscope into a body passage into the gastrointestinal system. The catheters have two or more independent lumens extending continuously to ports at the distal tip for injection of a contrast medium simultaneously with a guide wire for ERCP procedures and for passage of accessories such as visualization devices, polypectomy snares, cytology brushes, papillotomes and stone baskets for catheterization, diagnosis and treatment within the biliary tract. Use of balloons for maintaining a catheter in fixed position in the biliary tract and for dilatation is also disclosed. The catheters employed are extrusions of a resin comprised of nylon and PEBA. The catheters may also be extruded from polyurethane. Multi-lumen catheters having a reduced diameter distal tip portion on which a dilatation balloon is located are also disclosed. The reduced diameter distal tip portion may serve as a platform for support of a stent.Type: GrantFiled: August 30, 1996Date of Patent: December 1, 1998Assignee: Medical Innovations CorporationInventors: George W. Weaver, Harold Jacob, David F. Leighton, Damond C. Holsinger
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Patent number: 5788681Abstract: Multi-lumen catheters are intended for advancement through the accessory channel on endoscope into a body passage into the gastrointestinal system. The catheters have two or more independent lumens extending continuously to ports at the distal tip for injection of a contrast medium simultaneously with a guide wire for ERCP procedures and for passage of accessories such as visualization devices, polypectomy snares, cytology brushes, papillotomes and stone baskets for catheterization, diagnosis and treatment within the biliary tract. Use of balloons for maintaining a catheter in fixed position in the biliary tract and for dilatation is also disclosed. The catheters employed are extrusions of a resin comprised of nylon and PEBA. The catheters may also be extruded from polyurethane. Multi-lumen catheters having a reduced diameter distal tip portion on which a dilatation balloon is located are also disclosed. The reduced diameter distal tip portion may serve as a platform for support of a stent.Type: GrantFiled: October 15, 1996Date of Patent: August 4, 1998Assignee: Medical Innovations CorporationInventors: George W. Weaver, Harold Jacob, David F. Leighton, Damond C. Holsinger
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Patent number: 5599300Abstract: A method of electrosurgically obtaining access to the biliary tree of a patient and visualizing a duct thereof using a catheter having at least a first lumen and a second lumen defined therethrough, each lumnen terminating in an opening defined at a distal end of the catheter, the first lumen of the catheter having a needle-knife disposed therein and the second lumen of the catheter enabling infusion of a contrast medium to visualize the duct of the patient while the needle-knife remains in the first lumen of the catheter, the needle-knife having a distal end and being connected to a deployment mechanism at a proximal end of the catheter for extending and retracting the needle-knife between a deployed position and a fully sheathed position relative to the distal end of the catheter, the deployment mechanism having an adjustable stop for adjusting the distance between the distal end of the needle-knife and the distal end of the catheter, the needle-knife electrically communicating with a power source to enableType: GrantFiled: May 12, 1995Date of Patent: February 4, 1997Assignee: Arrow Precision Products, Inc.Inventors: George W. Weaver, Damond C. Holsinger, David F. Leighton, Harold Jacob
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Patent number: 5599299Abstract: Multi-lumen catheters are intended for advancement through the accessory channel on endoscope into a body passage into the gastrointestinal system. The catheters have two or more independent lumens extending continuously to ports at the distal tip for injection of a contrast medium simultaneously with a guide wire for ERCP procedures and for passage of accessories such as visualization devices, polypectomy snares, cytology brushes, papillotomes and stone baskets for catheterization, diagnosis and treatment within the biliary tract. Use of balloons for maintaining a catheter in fixed position in the biliary tract and for dilatation is also disclosed. The catheters employed are extrusions of a resin comprised of nylon and PEBA. The catheters may also be extruded from polyurethane. Multi-lumen catheters having a reduced diameter distal tip portion on which a dilatation balloon is located are also disclosed. The reduced diameter distal tip portion may serve as a platform for support of a stent.Type: GrantFiled: January 31, 1994Date of Patent: February 4, 1997Assignee: Arrow Precision Products, Inc.Inventors: George W. Weaver, Harold Jacob, David F. Leighton, Damond C. Holsinger
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Patent number: 5536248Abstract: A method of electrosurgically obtaining access to the biliary tree of a patient and visualizing a duct thereof using a catheter having a least a first lumen and a second lumen. The first lumen has a needle-knife disposed therein, which knife may be moved between a deployed position and a sheathed position and is in electrical communication with a power source.Type: GrantFiled: November 1, 1994Date of Patent: July 16, 1996Assignee: Arrow Precision Products, Inc.Inventors: George W. Weaver, Damond C. Holsinger, David F. Leighton, Harold Jacob
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Patent number: 5397302Abstract: A improved biliary catheter is disclosed. The catheter comprises a tube constructed from a polyurethane or nylon having a durometer of about 60D and coated with a hydrophilic coating to provide lubricity, kink resistance and suppleness. The tube has substantially cylindrical sidewalls and a proximal end for connection to a source of contrast medium and a distal end for entry into the common biliary duct of a patient. The tube contains a first crescent-shaped lumen channel extending between the proximal and the distal end, the first lumen channel transporting the contrast medium from the source of contrast medium to the biliary duct; and a second circular lumen channel extending between the proximal end and said distal end for facilitating the insertion and threading of a spring wire guide into the dual-lumen biliary catheter.Type: GrantFiled: May 11, 1993Date of Patent: March 14, 1995Assignee: Arrow Precision Products, Inc.Inventors: George W. Weaver, Harold Jacob, David F. Leighton