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.
