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US 4,069,153 AGranted
Method of destroying pyrogens
AssigneeAmerican Sterilizer Company
InventorDonald A. Gunther
Life of this patent
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Abstract
A method of providing a continuous available supply of physiologically safe water for use in fluid therapy by providing a sub-micron filter to remove bacteria at the source, and by continuously treating the water with ultraviolet light at a frequency range and dosage sufficient to destroy substantially all pyrogenicity and organisms, such as viruses, that are not retained by the filter.
Claims2
A method of providing a continuous flow of physiologically safe water comprising,
- providing a continuous flow of water containing lipopolysaccharides known as pyrogens,
- treating said water containing said lipopolysaccharides with ultra-violet light of a wave length and dosage sufficient to chemically alter substantially all pyrogens in said water to destroy substantially all pyrogenicity of said water,
- said ultra-violet light being of a wave length of 1800A to 2000A at a dosage in the order of 100,000 to 300,000 microwatt-seconds per square centimeter of area of said flow path,
- with all said water flowing within 6 millimeters of said light,
- thereby converting a substantial amount of oxygen dissolved in said water to ozone, and
- whereby said pyrogen destruction is enhanced and substantially all pyrogenicity of said water is destroyed and said water is safe for physiological use.
3 more elements
Dependencies are inferred from the claim text.