Patents by Inventor John C. Docherty

John C. Docherty 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).

  • Near infra red fluorescence imaging for visualization of blood vessels during endoscopic harvest
    Patent number: 10492671
    Abstract: Endoscopic identification and dissection of a blood vessel in tissue during endoscopic harvest can be enhanced by injecting a bolus of ICG into the bloodstream, illuminating the target vessels with excitation light capable of exciting fluorescence in the ICG, and locating the vessel to be harvested by observing the ICG fluorescence. Moreover, collapsed blood vessel may be harvested by inserting an endoscope into the collapsed blood vessel, injecting into the collapsed blood vessel a bolus containing ICG to re-inflate the blood vessel, illuminating the target vessels with excitation light capable of exciting fluorescence in the ICG; and locating the re-inflated blood vessel by observing the ICG fluorescence.
    Type: Grant
    Filed: May 10, 2010
    Date of Patent: December 3, 2019
    Assignee: Novadaq Technologies ULC
    Inventors: Douglas R. Carroll, Robert W. Flower, John C. Docherty
  • Method and apparatus for performing intra-operative angiography
    Patent number: 8892190
    Abstract: Method for assessing the patency of a patient's blood vessel, advantageously during or after treatment of that vessel by an invasive procedure, comprising administering a fluorescent dye to the patient; obtaining at least one angiographic image of the vessel portion; and evaluating the at least one angiographic image to assess the patency of the vessel portion. Other related methods are contemplated, including methods for assessing perfusion in selected body tissue, methods for evaluating the potential of vessels for use in creation of AV fistulas, methods for determining the diameter of a vessel, and methods for locating a vessel located below the surface of a tissue.
    Type: Grant
    Filed: March 13, 2012
    Date of Patent: November 18, 2014
    Assignee: National Research Council of Canada
    Inventors: John C. Docherty, Mark Hewco, Gurpreet Mangat, Robert W. Flower, Seshadri M. Chari
  • Method and apparatus for performing intra-operative angiography
    Patent number: 7881777
    Abstract: Method for assessing the patency of a patient's blood vessel, advantageously during or after treatment of that vessel by an invasive procedure, comprising administering a fluorescent dye to the patient; obtaining at least one angiographic image of the vessel portion; and evaluating the at least one angiographic image to assess the patency of the vessel portion. Other related methods are contemplated, including methods for assessing perfusion in selected body tissue, methods for evaluating the potential of vessels for use in creation of AV fistulas, methods for determining the diameter of a vessel, and methods for locating a vessel located below the surface of a tissue.
    Type: Grant
    Filed: November 28, 2007
    Date of Patent: February 1, 2011
    Assignee: National Research Council of Canada
    Inventors: John C. Docherty, Mark Hewko, Gurpreet Mangat, Robert W. Flower, Seshadri M. Chari
  • NEAR INFRA RED FLUORESCENCE IMAGING FOR VISUALIZATION OF BLOOD VESSELS DURING ENDOSCOPIC HARVEST
    Publication number: 20100286529
    Abstract: Endoscopic identification and dissection of a blood vessel in tissue during endoscopic harvest can be enhanced by injecting a bolus of ICG into the bloodstream, illuminating the target vessels with excitation light capable of exciting fluorescence in the ICG, and locating the vessel to be harvested by observing the ICG fluorescence. Moreover, collapsed blood vessel may be harvested by inserting an endoscope into the collapsed blood vessel, injecting into the collapsed blood vessel a bolus containing ICG to re-inflate the blood vessel, illuminating the target vessels with excitation light capable of exciting fluorescence in the ICG; and locating the re-inflated blood vessel by observing the ICG fluorescence.
    Type: Application
    Filed: May 10, 2010
    Publication date: November 11, 2010
    Applicant: NOVADAQ TECHNOLOGIES INC.
    Inventors: Douglas R. Carroll, Robert W. Flower, John C. Docherty
  • Method and apparatus for performing intra-operative angiography
    Patent number: 6915154
    Abstract: Method for assessing the patency of a patient's blood vessel, advantageously during or after treatment of that vessel by an invasive procedure, comprising administering a fluorescent dye to the patient; obtaining at least one angiographic image of the vessel portion; and evaluating the at least one angiographic image to assess the patency of the vessel portion. Other related methods are contemplated, including methods for assessing perfusion in selected body tissue, methods for evaluating the potential of vessels for use in creation of AV fistulas, methods for determining the diameter of a vessel, and methods for locating a vessel located below the surface of a tissue.
    Type: Grant
    Filed: August 11, 2000
    Date of Patent: July 5, 2005
    Assignee: National Research Council of Canada
    Inventors: John C. Docherty, Mark Hewko, Gurpreet Mangat, Robert W. Flower, Seshadri M. Chari