How soon after preparation must foam made from Fibrovein (sodium tetradecyl sulfate) 1% or 3% solution for injection be used?

Foam made from Fibrovein (sodium tetradecyl sulfate) 1% or 3% solution for injection must be prepared just before use and administered within 60 seconds of production by a physician appropriately trained in foam generation and administration; discard any foam remaining after 60 seconds.