Stable microbubble suspensions as enhancement agents for ultrasonic echography
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United States of America Patent
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Feb 13, 2001
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N/A
app pub date -
Sep 11, 1998
filing date -
Nov 2, 1992
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Abstract
Disclosed are injectable suspensions of gas filled microbubbles in an aqueous carrier liquid usable as contrast agents in ultrasonic echography. The suspensions comprise amphipathic compounds of which at least one may be a laminarized phospholipid as a stabilizer of the microbubbles against collapse with time and pressure. The concentration of phospholipids in the carrier liquid is below 0.01% wt but is at least equal to or above that at which phospholipid molecules are present solely at the gas microbubble-liquid interface. Also disclosed is a method of preparation of the stable suspensions of air or gas filled microbubbles.
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