德国DWL电子系统公司新开发的Embo-Dop血栓检测仪不仅能检测血栓的存在,而且能鉴别出是固体血栓还是气体血栓。由于固态血栓和气态血栓均以不同的方式反射不同频率的超声波,因此他们专门设计了一种特殊的探头,这种探头可同时发射两种不同的频率（2MHz和2.5MHz）,利用多范围技术（Multi-Range）就能正确、有效、可靠地区别 The newly developed Embo-Dop thrombus detector from DWL Electronic Systems in Germany not only detects the presence of thrombi, but also identifies whether it is a solid thrombus or a gas thrombus. Since both solid and gaseous thrombi reflect different frequencies of ultrasound in different ways, they have specifically designed a special probe that can simultaneously emit two different frequencies (2 MHz and 2.5 MHz) using multiple range technologies. (Multi-Range) can distinguish correctly, effectively and reliably