A tip of a needle is inserted into large vein of a patient. The needle is mounted
in a butterfly device axially engaged to a generally cylindrical housing containing
a Y-connector. A pharmaceutically acceptable solution is fed to the needle through
the Y-connector to the housing. A quartz optic fiber is fed through the housing
and needle to the tip of the needle in the patient's venous system. A source of
UV and visible light directs both UV and visible light alternatively through the
optic fiber to the patient's venous system to kill pathogens in the venous system.
