Patents by Inventor Gholam-Reza Zadno-Azizi

Gholam-Reza Zadno-Azizi 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).

  • Publication number: 20050228401
    Abstract: There is disclosed an accommodating intraocular lens for implantation in an eye having an optical axis. The lens comprises an anterior portion which in turn comprises an anterior viewing element and an anterior biasing element. The lens further comprises a posterior portion which in turn comprises a posterior viewing element in spaced relationship to the anterior viewing element and a posterior biasing element. The anterior portion and posterior portion meet at first and second apices of the intraocular lens. The anterior portion and the posterior portion and/or the apices are responsive to force thereon to cause the separation between the viewing elements to change. Additional embodiments and methods are also disclosed.
    Type: Application
    Filed: March 15, 2005
    Publication date: October 13, 2005
    Inventors: Gholam-Reza Zadno-Azizi, Tuan Nguyen
  • Publication number: 20050165410
    Abstract: There is disclosed an accommodating intraocular lens for implantation in an eye having an optical axis. The lens comprises an anterior portion which in turn comprises an anterior viewing element and an anterior biasing element. The lens further comprises a posterior portion which in turn comprises a posterior viewing element in spaced relationship to the anterior viewing element and a posterior biasing element. The anterior portion and posterior portion meet at first and second apices of the intraocular lens. The anterior portion and the posterior portion and/or the apices are responsive to force thereon to cause the separation between the viewing elements to change. Additional embodiments and methods are also disclosed.
    Type: Application
    Filed: November 12, 2004
    Publication date: July 28, 2005
    Inventors: Gholam-Reza Zadno-Azizi, Tuan Nguyen
  • Patent number: 6899732
    Abstract: There is disclosed an accommodating intraocular lens for implantation in an eye having an optical axis. The lens comprises an anterior portion which in turn comprises an anterior viewing element and an anterior biasing element. The lens further comprises a posterior portion which in turn comprises a posterior viewing element in spaced relationship to the anterior viewing element and a posterior biasing element. The anterior portion and posterior portion meet at first and second apices of the intraocular lens. The anterior portion and the posterior portion and/or the apices are responsive to force thereon to cause the separation between the viewing elements to change. Additional embodiments and methods are also disclosed.
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: May 31, 2005
    Assignee: Visiogen, Inc.
    Inventors: Gholam-Reza Zadno-Azizi, Tuan Anh Nguyen
  • Patent number: 6884261
    Abstract: There is disclosed a method of preparing an accommodating intraocular lens having an optical axis for subsequent implantation. The method comprises providing an intraocular lens having first and second viewing elements interconnected by plural members. At least a portion of the members are disposed from the optical axis by a distance greater than a periphery of at least one of the viewing elements. The distance is measured orthogonal to the optical axis. The method further comprises drawing the members inwardly toward the optical axis by relatively rotating the first and second viewing elements. The method further comprises increasing the separation between the viewing elements along the optical axis while drawing the members inwardly.
    Type: Grant
    Filed: July 25, 2002
    Date of Patent: April 26, 2005
    Assignee: Visiogen, Inc.
    Inventors: Gholam-Reza Zadno-Azizi, Tuan Anh Nguyen
  • Publication number: 20050055092
    Abstract: There is disclosed an accommodating intraocular lens for implantation in an eye having an optical axis. The lens comprises an anterior portion which in turn comprises an anterior viewing element and an anterior biasing element. The lens further comprises a posterior portion which in turn comprises a posterior viewing element in spaced relationship to the anterior viewing element and a posterior biasing element. The anterior portion and posterior portion meet at first and second apices of the intraocular lens. The anterior portion and the posterior portion and/or the apices are responsive to force thereon to cause the separation between the viewing elements to change. Additional embodiments and methods are also disclosed.
    Type: Application
    Filed: June 25, 2004
    Publication date: March 10, 2005
    Inventors: Tuan Nguyen, Valdemar Portney, Gholam-Reza Zadno-Azizi, Albert Ting
  • Publication number: 20050049700
    Abstract: There is disclosed an accommodating intraocular lens for implantation in an eye having an optical axis. The lens comprises an anterior portion which in turn comprises an anterior viewing element and an anterior biasing element. The lens further comprises a posterior portion which in turn comprises a posterior viewing element in spaced relationship to the anterior viewing element and a posterior biasing element. The anterior portion and posterior portion meet at first and second apices of the intraocular lens. The anterior portion and the posterior portion and/or the apices are responsive to force thereon to cause the separation between the viewing elements to change. Additional embodiments and methods are also disclosed.
    Type: Application
    Filed: June 25, 2004
    Publication date: March 3, 2005
    Inventors: Gholam-Reza Zadno-Azizi, Valdemar Portney, Erica Rogers, Tuan Nguyen, Albert Ting
  • Patent number: 6858040
    Abstract: There is disclosed an accommodating intraocular lens for implantation in an eye having an optical axis. The lens comprises an anterior portion which in turn comprises an anterior viewing element and an anterior biasing element. The lens further comprises a posterior portion which in turn comprises a posterior viewing element in spaced relationship to the anterior viewing element and a posterior biasing element. The anterior portion and posterior portion meet at first and second apices of the intraocular lens. The anterior portion and the posterior portion and/or the apices are responsive to force thereon to cause the separation between the viewing elements to change. Additional embodiments and methods are also disclosed.
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: February 22, 2005
    Assignee: Visiogen, Inc.
    Inventors: Tuan Anh Nguyen, Valdemar Portney, Gholam-Reza Zadno-Azizi, Albert C. Ting
  • Patent number: 6846326
    Abstract: There is disclosed an accommodating intraocular lens for implantation in an eye having an optical axis. The lens comprises an anterior portion which in turn comprises an anterior viewing element and an anterior biasing element. The lens further comprises a posterior portion which in turn comprises a posterior viewing element in spaced relationship to the anterior viewing element and a posterior biasing element. The anterior portion and posterior portion meet at first and second apices of the intraocular lens. The anterior portion and the posterior portion and/or the apices are responsive to force thereon to cause the separation between the viewing elements to change. Additional embodiments and methods are also disclosed.
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: January 25, 2005
    Assignee: Visiogen, Inc.
    Inventors: Gholam-Reza Zadno-Azizi, Valdemar Portney, Tuan Anh Nguyen
  • Patent number: 6805692
    Abstract: A method for the treatment of a stenosis or an occlusion in a blood vessel in which an occlusive device is first delivered and activated at a site distal to the occlusion to at least partially occlude the vessel. A therapy catheter is then introduced to treat the occlusion and a debris removal device is delivered to aspirate debris from the vessel. The present invention eliminates the need for a separate irrigation catheter and irrigation fluid which allows the procedure to be performed quickly and efficiently, and is especially useful in the removal of occlusion from saphenous vein grafts, the coronary and carotid arteries, arteries above the aortic arch and vessels of similar size and pressure.
    Type: Grant
    Filed: August 5, 2002
    Date of Patent: October 19, 2004
    Assignee: Medtronic AVE, Inc.
    Inventors: Ketan P. Muni, Gholam Reza Zadno-Azizi, Celso Bagaoisan
  • Patent number: 6790204
    Abstract: A method for the treatment of a stenosis or an occlusion in a blood vessel is disclosed in which a main catheter is first delivered to a site proximal to the occlusion. The main catheter may include an occlusive device at its distal end. An inner catheter or elongate member (e.g., a guidewire) having an occlusive device at its distal end is delivered to the site of the occlusion, and the occlusive device is activated at a site distal to the occlusion. A therapy catheter is then introduced to treat the occlusion. Next, a catheter is delivered just proximal to the occlusive device, and this catheter is used to aspirate and/or irrigate the area removing particles and debris. The aspiration and irrigation steps are preferably repeated until the particles and debris are removed. Perfusion may be performed by using a perfusion-filter distal of the lesion to be treated or a hypotube which extends beyond the occlusive device attached to the guidewire.
    Type: Grant
    Filed: April 15, 2003
    Date of Patent: September 14, 2004
    Assignee: Medtronic Vascular, Inc.
    Inventors: Gholam-Reza Zadno-Azizi, Mukund R. Patel, Ketan P. Muni, Celso J. Bagaosian, Hung V. Ha
  • Patent number: 6786934
    Abstract: There is disclosed an accommodating intraocular lens for implantation in an eye having an optical axis. The lens has an anterior portion which in turn includes an anterior viewing element and an anterior biasing element. The lens also has a posterior portion which in turn includes a posterior viewing element in spaced relationship to the anterior viewing element and a posterior biasing element. The anterior portion and posterior portion meet at first and second apices of the intraocular lens. The anterior portion and the posterior portion and/or the apices are responsive to force thereon to cause the separation between the viewing elements to change. Additional embodiments and methods are also disclosed.
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: September 7, 2004
    Assignee: Visiogen, Inc.
    Inventors: Gholam-Reza Zadno-Azizi, Tuan Anh Nguyen, Albert C. Ting, Valdemar Portney
  • Patent number: 6786888
    Abstract: A low profile catheter valve comprises a movable sealer portion positioned within the inflation lumen of a catheter. The sealer portion forms a fluid tight seal with the inflation lumen by firmly contacting the entire circumference of a section of the inflation lumen. The sealer portion may be positioned proximally of a side-access inflation port on the catheter, to establish an unrestricted fluid pathway between the inflation port and an inflatable balloon on the distal end of the catheter. As desired, the clinician may move the sealer portion to a position distal of the inflation port, thereby preventing any fluid from being introduced into or withdrawn from the balloon via the inflation port.
    Type: Grant
    Filed: October 6, 2000
    Date of Patent: September 7, 2004
    Assignee: Medtronic AVE, Inc.
    Inventors: Gholam-Reza Zadno-Azizi, Celso J. Bagaoisan, Jefferey C. Bleam
  • Patent number: 6764511
    Abstract: There is disclosed an accommodating intraocular lens for implantation in an eye having an optical axis. The lens comprises an anterior portion which in turn comprises an anterior viewing element and an anterior biasing element. The lens further comprises a posterior portion which in turn comprises a posterior viewing element in spaced relationship to the anterior viewing element and a posterior biasing element. The anterior portion and posterior portion meet at first and second apices of the intraocular lens. The anterior portion and the posterior portion and/or the apices are responsive to force thereon to cause the separation between the viewing elements to change. Additional embodiments and methods are also disclosed.
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: July 20, 2004
    Assignee: Visiogen, Inc.
    Inventors: Gholam-Reza Zadno-Azizi, Valdemar Portney, Erica J. Rogers, Tuan Anh Nguyen, Albert C. Ting
  • Patent number: 6761737
    Abstract: There is disclosed an accommodating intraocular lens for implantation in an eye having an optical axis. The lens comprises an anterior portion which in turn comprises an anterior viewing element and an anterior biasing element. The lens further comprises a posterior portion which in turn comprises a posterior viewing element in spaced relationship to the anterior viewing element and a posterior biasing element. The anterior portion and posterior portion meet at first and second apices of the intraocular lens. The anterior portion and the posterior portion and/or the apices are responsive to force thereon to cause the separation between the viewing elements to change. Additional embodiments and methods are also disclosed.
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: July 13, 2004
    Assignee: Visiogen, Inc.
    Inventors: Gholam-Reza Zadno-Azizi, Tuan Anh Nguyen, Valdemar Portney, Albert C. Ting
  • Publication number: 20040054347
    Abstract: A method for the treatment of a stenosis or an occlusion in a blood vessel is disclosed in which a main catheter is first delivered to a site proximal to the occlusion. The main catheter may include an occlusive device at its distal end. An inner catheter or elongate member (e.g., a guidewire) having an occlusive device at its distal end is delivered to the site of the occlusion, and the occlusive device is activated at a site distal to the occlusion. A therapy catheter is then introduced to treat the occlusion. Next, a catheter is delivered just proximal to the occlusive device, and this catheter is used to aspirate and/or irrigate the area removing particles and debris. The aspiration and irrigation steps are preferably repeated until the particles and debris are removed. Perfusion may be performed by using a perfusion-filter distal of the lesion to be treated or a hypotube which extends beyond the occlusive device attached to the guidewire.
    Type: Application
    Filed: April 15, 2003
    Publication date: March 18, 2004
    Inventors: Gholam-Reza Zadno-Azizi, Mukund R. Patel, Ketan P. Muni, Celso J. Bagaoisan, Hung V. Ha
  • Publication number: 20040015150
    Abstract: Disclosed herein is a catheter for use in an emboli containment system. In one embodiment, the catheter includes a flexible elongate member having self-expanding sealing means mounted on its distal extremity. This self-expanding sealing means can take any suitable form, such as a braided structure formed of a suitable shape memory material such as a nickel titanium alloy. In order to prevent abrasion of a vessel, it is desirable to cover the braided structure with a covering of a suitable material such as a polymer which extends over the braided structure and which moves with the braided structure as it expands and contracts.
    Type: Application
    Filed: April 30, 2003
    Publication date: January 22, 2004
    Inventor: Gholam-Reza Zadno-Azizi
  • Patent number: 6652480
    Abstract: A method for reducing distal embolization during insertion of devices to treat plaque, thrombi and other intravascular occlusions. Using a guide catheter, a guidewire is delivered to a site proximal to the lesion. An aspiration catheter is then introduced over the guidewire, and the two are moved together in a distal to proximal direction across the occlusion. The aspiration catheter is then moved in a proximal to distal direction while continuously aspirating, which prevents embolization of any particles which may be created during the crossing of the guidewire.
    Type: Grant
    Filed: November 10, 1999
    Date of Patent: November 25, 2003
    Assignee: Medtronic Ave., Inc.
    Inventors: Mir A. Imran, Ketan P. Muni, Gholam-Reza Zadno-Azizi
  • Publication number: 20030212452
    Abstract: A device to provide body fluid flow control in the form of a valve to be located within a duct or passageway. The device is controlled through pressure above a preselected threshold. Bulk resilience about a passageway in a valve body provides the mechanism for controlled flow. One-way valve operation may be provided through a flap or through a pressure differential on the valve body depending upon the direction of flow. A frame structure positioned within a resilient seal includes longitudinally elongate elements which may be of spring material, malleable material or heat recoverable material so as to accomplish an initial insertion state and an expanded anchoring state. A valve support transitions between the resilient seal portion and the valve body to insure that the states do not change the threshold opening pressure. Insertion devices may be employed to position and actuate a change of state of the frame in the body duct or passageway.
    Type: Application
    Filed: June 3, 2003
    Publication date: November 13, 2003
    Inventors: Gholam-Reza Zadno-Azizi, John S. Ford, April Marano-Ford
  • Publication number: 20030208222
    Abstract: Disclosed herein is a catheter for use in an emboli containment system. In one embodiment, the catheter has a tubular body with a metallic braid construction. Two lumens extend through the tubular body, the lumen being in a side-by-side configuration. One of the lumens functions as an inflation lumen, and is in fluid communication with an inflatable balloon mounted on the distal end of the catheter. The second lumen is adapted to receive other therapeutic catheters which comprise the emboli containment system. In another embodiment, apparatus is provided for treatment of a stenosis in a lumen in a blood-carrying vessel comprising a main catheter and a therapeutic catheter. The main catheter comprises a first flexible elongate tubular member having proximal and distal extremities. A sealing element is carried on the distal extremity of the first flexible elongate tubular member.
    Type: Application
    Filed: February 21, 2001
    Publication date: November 6, 2003
    Inventor: Gholam-Reza Zadno-Azizi
  • Publication number: 20030199972
    Abstract: A device to provide body fluid flow control in the form of a valve to be located within a duct or passageway. The device is controlled through pressure above a preselected threshold. Bulk resilience about a passageway in a valve body provides the mechanism for controlled flow. One-way valve operation may be provided through a flap or through a pressure differential on the valve body depending upon the direction of flow. A frame structure positioned within a resilient seal includes longitudinally elongate elements which may be of spring material, malleable material or heat recoverable material so as to accomplish an initial insertion state and an expanded anchoring state. A valve support transitions between the resilient seal portion and the valve body to insure that the states do not change the threshold opening pressure. Insertion devices may be employed to position and actuate a change of state of the frame in the body duct or passageway.
    Type: Application
    Filed: April 18, 2003
    Publication date: October 23, 2003
    Inventors: Gholam-Reza Zadno-Azizi, John S. Ford, April Marano-Ford