Acton C M
Mercy Hospital for Women, Melbourne.
Aust Fam Physician. 1997 Mar;26(3):239-43.
An ultrasound scan is a medical imaging diagnostic test used in obstetrics for over 20 years. With technological improvements, increased image quality and Doppler techniques, the capabilities and limitations can now be more clearly defined and cost effectiveness taken into consideration. This article reviews just what information a scan can provide and what it can't. The indications are divided into three main time periods. The 18-20 week scan which provides the most information and in many patients will be the only scan required. Reasons for performing the early pre 12 week and late post 26 week scans are also reviewed. Obstetric scanning has added significantly to the development of fetal medicine. This involves the antenatal detection of a condition, that may require treatment or alter management of the pregnant patient.
超声扫描作为一种医学影像诊断检查，在产科领域已应用了20多年。随着技术的进步、图像质量的提高以及多普勒技术的发展，其功能和局限性如今能得到更清晰的界定，同时也考虑到了成本效益。本文回顾了超声扫描能提供哪些信息以及不能提供哪些信息。其适应证主要分为三个时间段。妊娠18至20周的扫描能提供最多信息，对许多患者来说，这可能是唯一需要的扫描。本文还对妊娠12周前早期扫描和妊娠26周后晚期扫描的进行原因进行了回顾。产科超声扫描极大地推动了胎儿医学的发展。这包括对可能需要治疗或改变孕妇管理方式的病症进行产前检测。
