Gas emulsions stabilized with fluorinated ethers having low Ostwald coefficients
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United States of America Patent
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Sep 8, 1998
Grant Date -
N/A
app pub date -
Jun 7, 1995
filing date -
Jun 7, 1995
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Expired
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Abstract
Long lasting gas emulsions for ultrasound and magnetic resonance imaging contrast enhancement utilize low Ostwald coefficient fluoromono- and fluoropolyether compounds. Gas emulsion preparations are disclosed containing air mixed with perfluorodiglyme (CF.sub.3 (OCF.sub.2 CF.sub.2).sub.2 OCF.sub.3), perfluoromonoglyme (CF.sub.3 OCF.sub.2 CF.sub.2 OCF.sub.3), perfluorodiethylether, C.sub.2 F.sub.5 OC.sub.2 F.sub.5, perfluoroethylmethylether, CF.sub.3 OC.sub.2 F.sub.5, and perfluorodimethylether, CF.sub.3 OCF.sub.3.
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