Long-lasting aqueous dispersions or suspensions of pressure-resistant gas-filled microvesicles and methods for the preparation thereof

   
   

One can impart outstanding resistance against collapse under pressure to gas-filled microvesicle used as contrast agents in ultrasonic echography by using as fillers gases whose solubility in water, expressed in liter of gas by liter of water under standard conditions, divided by the square root of the molecular weight does not exceed 0.003.

On peut donner la résistance exceptionnelle contre l'effondrement sous pression au microvesicle plein de gaz utilisé comme agents de contraste dans l'echography ultrasonique en employant pendant que les gaz de remplisseurs dont l'hydrosolubilité, exprimée en litre de gaz par le litre de l'eau dans des conditions standard, divisé par la racine carrée du poids moléculaire n'excède pas 0.003.

 
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