- Sodium Teradecyl Sulfate [ˈsʌlˌfet] 十六烷基硫酸钠(STS)
Sclerotherapy Foam 硬化泡沫
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STS and polidocanol
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Room air: risk of nitrogen retention-escape
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CO2: 50X more diffusible than nitrogen
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Exchanged 20 times without interruption
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Stable, homogenous and viscous microfoam with fine bubbles.
Ideal Foam: 理想的泡沫
Homogeneous bubbles – viscosity and stability
Small bubbles (< 100 µm):
High pressure and surface tension
More effective
Surfactants stabilize bubbles (Marangoni effect)
Emulsions (oil suspended in water) surfactant decrease in surface tension, stability
Size of bubbles
Macrofoam > 500 µm
Minifoam 250 – 500 µm
Microfoam < 250 µm
