Agents for enhancing the contrast in a diagnostic ultrasound procedure comprise colloidal dispersions of the liquid-in-liquid type, i.e., emulsions or microemulsions, in which the dispersed liquid phase is a high vapor pressure chemical which undergoes a phase change from a dispersed liquid to a highly echogenic dispersed gaseous foam or kugelschaum following administration to an organism. The liquid state of the dispersed phase allows one to manufacture extremely stable, pharmaceutically acceptable emulsions with particle sizes typically below 1000 nm. The gaseous state at body temperature yields highly echogenic microbubbles, typically below 10,000 nm in diameter, which are effective as ultrasound contrast agents. Intravenous, intraarterial, oral, intraperitoneal, and intrauterine dosage forms, methods of administration, and imaging techniques are described.
增强诊断超声成像对比度的药剂包括液-液类型的胶体分散液,即乳液或微乳液,其中分散液相是高蒸汽压
化学物质,给
生物体内注射后会从分散液态变成高回声分散气态泡沫或库格尔沙发。分散相的液态状态允许制造非常稳定、药学上可接受的乳液,粒径通常小于1000纳米。在体温下的气态状态产生高回声的微泡,直径通常小于10,000纳米,可作为超声对比剂。描述了静脉、动脉内、口服、腹腔内和子宫内剂型、给药方法和成像技术。