探讨品管圈在提高孕11~13⁺⁶周胎儿颈后透明层厚度（NT）超声检查图像质量控制中的应用效果。

广东省妇幼保健院超声诊断科于2020年8月至2021年4月开展品管圈活动，选定活动主题为“提高11~13⁺⁶周NT超声检查图像达标率”。对2019年8月至2020年4月（品管圈活动实施前）进行11~13⁺⁶周NT超声检查的14 992例检查者超声图像质量进行收集及分析，对上述超声图像质量进行打分，评判是否达标并统计，然后进行超声图像质量达标与不达标要因分析，设定活动目标、拟定对策。于2020年8月至9月实施拟定对策、确认效果并标准化持续实施。采用χ²检验比较品管圈活动实施前和2020年10月至2021年4月（品管圈活动实施后）的11~13⁺⁶周NT超声检查图像达标率的差异。

开展品管圈活动后统计发现11~13⁺⁶周NT超声检查的11 482例检查者超声图像，其中达标10 576人次，不达标906人次，11~13⁺⁶周NT超声检查图像达标率为92.1%，11~13⁺⁶周NT超声检查图像达标率由品管圈活动实施前的84.9%（12 728/14 992）升至实施后的92.1%，差异有统计学意义（χ²=0.000，P＜0.001）。

品管圈可有效提升11~13⁺⁶周NT超声检查图像达标率，提升超声医学专业质量管理能力。

To investigate the effect of quality control circle (QCC) activity in improving the image quality control of the nuchal translucency (NT) ultrasound in women at 11-13⁺⁶ weeks of pregnancy.

The QCC activity was carried out from August 2020 to April 2021 at Department of Ultrasound, Guangdong Women and Children Hospital. The theme of the selected activity was determined to be"improving the image quality control of the NT ultrasound in the 11-13⁺⁶ weeks of pregnancy". Afterwards, a plan was developed to grasp the current situation. The ultrasound image quality of 14 992 patients who had undergone NT ultrasound examination at 11~13⁺⁶ weeks of pregnancy were collected and retrospectively analyzed from August 2019 to April 2020. The ultrasound examination at 11-13⁺⁶ weeks of pregnancy by the same ultrasound physician was scored by three deputy chief or above physicians to assess whether the ultrasonic images met the standard. Then, the activity goal was set, and the countermeasures were proposed. Based on the data, the goal and measures were determined, confirmed, and implemented continuously from August to September 2020. The image quality control of the NT ultrasound at 11-13⁺⁶weeks of pregnancy before the implementation of the measures (from August to April 2018) was compared with that after the implementation of the measures (from October to April 2019) by χ² test.

After the implementation of QCC activity, statistical analysis showed that 92.1% (10 576/11 482) of cases had NT ultrasound images that met the standard, which was significantly higher than that before the implementation of QCC activity (84.9%, χ²=0.000, P<0.001).

QCC activity can effectively improve NT ultrasound images at 11-13⁺⁶ weeks of pregnancy and the professional quality management ability of ultrasonic medicine.