Methods for making ultrasound contrast agents
First Claim
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1. A method for preparing a phospholipid suspension useful for preparing an ultrasound contrast agent comprisingcombining DPPA, DPPC and MPEG5000-DPPE, in propylene glycol to form a phospholipid solution, the MPEG5000-DPPE selected as having a calcium concentration of less than 115 parts per million (ppm), wherein the phospholipid solution has a calcium concentration of less than 0.7 ppm, andcombining the phospholipid solution with an aqueous solution to form a phospholipid suspension.
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Abstract
Provided herein are improved methods for preparing phospholipid formulations including phospholipid UCA formulations.
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18 Claims
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1. A method for preparing a phospholipid suspension useful for preparing an ultrasound contrast agent comprising
combining DPPA, DPPC and MPEG5000-DPPE, in propylene glycol to form a phospholipid solution, the MPEG5000-DPPE selected as having a calcium concentration of less than 115 parts per million (ppm), wherein the phospholipid solution has a calcium concentration of less than 0.7 ppm, and combining the phospholipid solution with an aqueous solution to form a phospholipid suspension.
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10. A method for preparing a phospholipid suspension useful for preparing an ultrasound contrast agent comprising
combining DPPA, DPPC and MPEG5000-DPPE in propylene glycol, in a methanol and toluene free and methyl t-butyl ether free condition, to form a phospholipid solution, wherein MPEG5000-DPPE has a calcium concentration of less than 115 parts per million (ppm), and wherein the phospholipid solution has a calcium concentration of less than 0.7 ppm, and combining the phospholipid solution with an aqueous solution to form a phospholipid suspension.
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