Patent ID: 7070722

Claim:
A process of producing a sterile foam for medical or veterinary use, said process comprising the following steps: a) forming a physiologically acceptable foam for application to a body, said foam comprising a foamable gelling agent, and wherein said gelling agent is treated with a first precipitant which is calcium citrate, calcium-releasing water-soluble glass, or a combination thereof, and wherein said first precipitant is combined with said gelling agent before or during the foaming of the gelling agent and stabilises the gelling agent; b) allowing the foam thus obtained to cure; c) immersing the cured foam in a bath of a second precipitant which is calcium citrate, calcium-releasing water-soluble glass, or a combination thereof, to form a treated foam; d) drying the treated foam; and e) sterilising said dried treated foam by exposure to gamma-irradiation or ethylene oxide.