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AssigneeBTG International Limited
InventorsDavid Dakin Iorwerth Wright, Anthony David Harman, Nikki Robinson, Garry Hodges, Adil Kadar, Geoffrey D. Moggridge, Hugh Van Liew
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A therapeutic foam for the treatment of, inter alia, varicose veins comprises a sclerosing solution foamed with a physiological gas such as carbon dioxide, oxygen or a mixture thereof. The foam has a nitrogen content of less than 0.8%. It may be generated using a pressurized canister system incorporating a fine mesh of micron dimensions through which the gas and sclerosing liquid are passed to make the foam. Alternatively, the foam may be generated by passing gas and solution between two syringes through a fine mesh. Techniques are described for minimizing the amount of nitrogen in a canister or syringe based product. A technique for generating and delivering foam simultaneously using a syringe based device is also disclosed.
A method of making a canister, the contents of which consist of a liquid component and a gas component, maintained at above atmospheric pressure, wherein the liquid component comprises at least one sclerosing agent and the gas component consists essentially of gaseous nitrogen present in an amount ranging from 0.0001% to 0.8% by volume and at least one other physiologically acceptable gas, the method comprising:
Dependencies are inferred from the claim text.