肺脏作为含气器官,通常被认为是超声检查的盲区,但随着超声医学技术的不断进步和发展,肺超声的应用逐渐被关注。由于超声波在肺表面产生反射,会形成一种水平走行的胸膜混响伪像,称为A线。有研究表明,其实它是由于肺内空气和组织液的体积发生改变而产生的~([1])。在1998年,国外研究者用超声检查肺部时,首次提出了从肺壁界面发出的多重的,双边的传播至 As a gas-containing organ, the lungs are usually considered as blind spots for ultrasound examination. However, with the development of ultrasound medical technology, the application of pulmonary ultrasound has drawn increasing attention. As the ultrasound produces reflections on the surface of the lungs, a horizontally moving pleural reverb artifact forms, called the A-line. Some studies show that, in fact, it is due to changes in the volume of air and interstitial fluid produced ~ ([1]). In 1998, when foreign researchers examined the lungs ultrasonically, it was the first time that multiple, bilateral transmission from the pulmonary wall interface to