A microbubble preparation formed of a plurality of microbubbles comprising a first gas and a second gas surrounded by a membrane such as a surfactant, wherein the first gas and the second gas are present in a molar ratio of from about 1:100 to about 1000:1, and wherein the first gas has a vapor pressure of at least about (760 - x) mm Hg at 37 °C, where x is the vapor pressure of the second gas at 37 ° C, and wherein the vapor pressure of each of the first and second gases is greater than about 75 mm Hg at 37 °C; also disclosed are methods for preparing microbubble compositions, including compositions that rapidly shrink from a first average diameter to a second average diameter less than about 75 % of the first average diameter and are stabilized at the second average diameter; methods and kits for preparing microbubbles; and methods for using such microbubbles as contrast agents.
一种微气泡制剂,由多个微气泡组成,微气泡包括被
表面活性剂等膜包围的第一气体和第二气体,其中第一气体和第二气体的摩尔比为约1:100至约1000:其中第一气体在 37 °C时的蒸气压至少为约 (760 - x) mm Hg,其中 x 为第二气体在 37 °C时的蒸气压,且第一和第二气体在 37 °C时的蒸气压均大于约 75 mm Hg;还公开了制备微气泡组合物的方法,包括从第一平均直径快
速收缩到第二平均直径小于第一平均直径的约75%并稳定在第二平均直径的组合物;制备微气泡的方法和试剂盒;以及将这种微气泡用作造影剂的方法。