Patents by Inventor Andrew Hoffa
Andrew Hoffa 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: 9421096Abstract: An expandable venous valve having a support structure that is configured to enlarge the area adjacent to the valve structure such that the flow patterns of retrograde flow are modified in a way that facilitates the flushing of the pockets at the base of the valve area to prevent stagnation of bodily fluid, which in the venous system, can lead to thrombus formation. The enlarged pocket areas can be created by forming an artificial sinus adjacent the valve structure in an unsupported section of vessel wall between two support frame sections or the support frame can comprise an expanded-diameter intermediate or proximal section that forms an artificial sinus adjacent the valve structure.Type: GrantFiled: July 16, 2012Date of Patent: August 23, 2016Assignee: COOK MEDICAL TECHNOLOGIES LLCInventors: Brian C. Case, Michael L. Garrison, Andrew Hoffa, Darin G. Schaeffer, Jacob A. Flagle
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Publication number: 20130018453Abstract: An expandable venous valve having a support structure that is configured to enlarge the area adjacent to the valve structure such that the flow patterns of retrograde flow are modified in a way that facilitates the flushing of the pockets at the base of the valve area to prevent stagnation of bodily fluid, which in the venous system, can lead to thrombus formation. The enlarged pocket areas can be created by forming an artificial sinus adjacent the valve structure in an unsupported section of vessel wall between two support frame sections or the support frame can comprise an expanded-diameter intermediate or proximal section that forms an artificial sinus adjacent the valve structure.Type: ApplicationFiled: July 16, 2012Publication date: January 17, 2013Inventors: Brian C. Case, Michael L. Garrison, Andrew Hoffa, Darin G. Schaeffer, Jacob A. Flagle
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Patent number: 8221492Abstract: An expandable venous valve having a support structure that configured to enlarge the area adjacent to the valve structure such that the flow patterns of retrograde flow are modified in a way that facilitates the flushing of the pockets at the base of the valve area to prevent stagnation of bodily fluid, which in the venous system, can lead to thrombus formation. The enlarged pocket areas can be created by forming an artificial sinus adjacent the valve structure in an unsupported section of vessel wall between two support frame section or the support frame can comprise an expanded-diameter intermediate or proximal section that forms an artificial sinus adjacent the valve structure.Type: GrantFiled: April 21, 2004Date of Patent: July 17, 2012Assignee: Cook Medical TechnologiesInventors: Brian C. Case, Michael L. Garrison, Andrew Hoffa, Darin G. Schaeffer, Jacob A. Flagle
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Publication number: 20100131055Abstract: An expandable venous valve having a support structure configured to enlarge the area adjacent the valve structure. The enlarged pocket areas can be created by forming an artificial sinus adjacent the valve structure in an unsupported section of vessel wall between two support frame sections.Type: ApplicationFiled: November 9, 2009Publication date: May 27, 2010Applicant: COOK INCORPORATEDInventors: Brian C. Case, Michael L. Garrison, Andrew Hoffa, Darin G. Schaeffer, Jacob A. Flagle
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Publication number: 20080097586Abstract: An valve prosthesis, such as an artificial venous valve, having a support frame and leaf structure comprising one or more leaflets in which the outer edge of each leaflet engages the inner circumference of the bodily passageway along a serpentine path urged against the passageway by an expandable frame, while the inner edges move in response to fluid to restrict retrograde flow. Optionally, one or more elements can extend from the support frame/leaf structure to provide centering support and/or protection from the leaflet adhering to the vessel wall. In one embodiment, the centering support structure comprises a second or third expandable frames attached to and extending from the proximal and/or distal ends of main valve structure and support frame. In another embodiment, one or more support elements extend outward from the valve support frame to engage the vessel wall to provide greater longitudinal stability.Type: ApplicationFiled: October 31, 2007Publication date: April 24, 2008Inventors: DUSAN PAVCNIK, THOMAS OSBORNE, BRIAN Case, JACOB FLAGLE, MICHAEL GARRISON, RAM PAUL, ANDREW HOFFA, RAYMOND LEONARD, DARIN SCHAEFFER, RICHARD SISKEN
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Publication number: 20070260327Abstract: An expandable venous valve having a support structure that configured to enlarge the area adjacent to the valve structure such that the flow patterns of retrograde flow are modified in a way that facilitates the flushing of the pockets at the base of the valve area to prevent stagnation of bodily fluid, which in the venous system, can lead to thrombus formation. The enlarged pocket areas can be created by forming an artificial sinus adjacent the valve structure in an unsupported section of vessel wall between two support frame section or the support frame can comprise an expanded-diameter intermediate or proximal section that forms an artificial sinus adjacent the valve structure.Type: ApplicationFiled: April 21, 2004Publication date: November 8, 2007Inventors: Brian Case, Michael Garrison, Andrew Hoffa, Darin Schaeffer, Jacob Flagle
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Publication number: 20070106372Abstract: Medical devices for implantation in a body vessel are provided. A medical device according to the invention comprises a support structure and one or more graft members comprising a valve portion and a constraining portion. The support structure has a first, unexpanded configuration and a second, expanded configuration. The constraining portion is adapted to substantially prevent the support structure from achieving the second, expanded configuration. The valve portion is adapted to permit fluid flow through a body vessel in a first direction and substantially prevent fluid flow through the vessel in a second, opposite direction.Type: ApplicationFiled: October 10, 2006Publication date: May 10, 2007Applicant: COOK INCORPORATEDInventors: Thomas Osborne, Brian Case, Jacob Flagle, Andrew Hoffa, Michael Garrison
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Publication number: 20060142846Abstract: A multiple-sided medical device comprises a frame comprising wire or other resilient material and having a series of bends and interconnecting sides. The device has both a flat configuration and a second, folded configuration which a generally serpentine shape. The device is pushed from a delivery catheter into the lumen of a duct or vessel and may include one or more barbs for anchoring purposes. A full or partial covering of fabric or other flexible material such as DACRON, PTFE, or a collagen-based material such as small intestinal submucosa (SIS), may be sutured or attached to the frame using heat or pressure welding crimping, adhesive, or other techniques to form an occlusion device, a stent graft, or an implantable, intraluminal valve such as for correcting incompetent veins in the lower legs and feet.Type: ApplicationFiled: June 22, 2005Publication date: June 29, 2006Inventors: Dusan Pavcnik, Frederick Keller, Josef Rosch, Thomas Osborne, Brian Bates, John DeFord, Christopher Dixon, Andrew Hoffa, Raymond Leonard, Joseph Obermiller
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Publication number: 20060116643Abstract: A pressure injection syringe with an actuator that includes a plunger for pressurizing viscous fluid material within a chamber. The plunger distal tip includes a high pressure seal defined by a seal member within a seal seat. The high pressure seal is viscoselective to permit air passage therepast for aspiration, and to prohibit viscous material passage therepast during actuation of the actuator wherein high pressure is applied to the material within the chamber. The viscoselective seal may be defined for example by small axial openings in the seal seat that permit aspiration of air therepast during initial plunger insertion into the chamber, but fluid escape is prohibited by the seal member when the seal member is pressed firmly against a collar of the plunger proximally adjacent the seal seat by initial engagement of the seal member with the viscous material, thus completely sealing the chamber at the proximal end thereof.Type: ApplicationFiled: June 23, 2005Publication date: June 1, 2006Inventors: Christopher Dixon, Jacob Flagle, Andrew Hoffa, Joseph Lane
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Publication number: 20050283178Abstract: Delivery systems, methods of making delivery systems, and methods of treatment are provided. A delivery system according to the invention facilitates a visual inspection of an intraluminal medical device included in the delivery system.Type: ApplicationFiled: May 6, 2005Publication date: December 22, 2005Inventors: Jacob Flagle, Brian Case, Andrew Hoffa, Michael Garrison
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Publication number: 20050228479Abstract: A delivery system (10) for implanting a medical device (30) such as a venous valve into the vasculature of a patient. The delivery system includes a delivery catheter (11) having a device-containing portion (15) adjacent to the distal end (14) thereof, and an inner member (16) extending through the catheter and beyond the distal end thereof, to an atraumatic distal tip portion (17) forward of the catheter distal end. Delivery catheter (11) includes inner tube (122), flat wire coil (123) compression fitted therearound, and outer tube (112) mechanically connected to roughened outer surface (126) of the inner tube through the spacing of the coil. Delivery catheter (11) can be provided with a window (184) to allow fluoroscopic visualization of a stent valve within the delivery system.Type: ApplicationFiled: June 9, 2005Publication date: October 13, 2005Inventors: Dusan Pavcnik, Brian Case, Christopher Dixon, Jacob Flagle, Michael Garrison, Andrew Hoffa, Ray Leonard
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Publication number: 20050103332Abstract: Soft-tipped airway exchange apparatus for use when replacing an endotracheal tube in a patient with a new endotracheal tube. The apparatus comprises a polymeric catheter body sized for insertion into a passageway of the endotracheal tube, for ventilating the patient during replacement of the endotracheal tube. The catheter body has a proximal portion, a distal portion and a ventilation passageway extending longitudinally therein. The distal portion has a rigidity which is less than the rigidity of the proximal portion.Type: ApplicationFiled: October 7, 2004Publication date: May 19, 2005Inventors: Bruce Gingles, Daniel Sirota, Andrew Hoffa, Frank Fischer, James Hunt
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Publication number: 20050100580Abstract: A medical device comprises a main body, a therapeutic agent and a radiation-curable hydrophilic coating. The hydrophilic coating allows for easy insertion of medical devices, which may include catheters, cannulae, stents, wire guides, and the like. The medical device may include more than one therapeutic agent.Type: ApplicationFiled: October 14, 2004Publication date: May 12, 2005Inventors: Thomas Osborne, Andrew Hoffa, Bruce Gingles, Jason Urbanski