Van den Hof Michiel C
Halifax, NS.
J Obstet Gynaecol Can. 2018 May;40(5):627-632. doi: 10.1016/j.jogc.2017.11.023.
To review the biological effects and safety of obstetric ultrasound.
Outline the circumstances in which safety may be a concern with obstetric ultrasound.
The 2005 version of this guideline was used as a basis and updated following a Medline search and review of relevant publications. Sources included guidelines and reports by Health Canada and the American Institute of Ultrasound in Medicine.
Review by principal author and the Diagnostic Imaging Committee of the SOGC. The quality of evidence and classification of recommendations have been adapted from the Report of the Canadian Task Force on the Periodic Health Examination.
BENEFITS, HARMS, AND COSTS: Obstetric ultrasound should only be done for medical reasons, and exposure should be kept as low as reasonably achievable because of the potential for tissue heating. Higher energy is of particular concern in the following scenarios: Doppler studies (pulsed, colour, and power), first trimester ultrasound with a long trans-vesical path (>5 cm), second or third trimester exams when bone is in the focal zone, when scanning tissue with minimal perfusion (embryonic), or in patients who are febrile. Operators can minimize risk by limiting dwell time and exposure to critical structures. It is also important to be aware of equipment-generated exposure information.
回顾产科超声的生物学效应和安全性。
概述产科超声安全性可能受到关注的情况。
本指南2005年版本作为基础，并在进行Medline检索及回顾相关出版物后进行更新。资料来源包括加拿大卫生部和美国医学超声学会的指南及报告。
由主要作者及加拿大妇产科医师学会诊断成像委员会进行审查。证据质量和推荐分级改编自加拿大定期健康检查特别工作组的报告。
益处、危害和成本：产科超声仅应用于医学目的，鉴于存在组织发热的可能性，应将暴露保持在合理可行的最低水平。在以下情况下，较高能量尤其值得关注：多普勒检查（脉冲、彩色和功率）、经膀胱路径较长（>5厘米）的孕早期超声检查、骨位于聚焦区的孕中期或孕晚期检查、扫描灌注极少的组织（胚胎）时，或发热患者。操作人员可通过限制驻留时间和减少对关键结构的暴露来降低风险。了解设备产生的暴露信息也很重要。
