探讨新型冠状病毒肺炎（COVID-19）疫情防控期间产科超声工作量的变化趋势。

回顾性分析2020年2月至5月（疫情期）北京协和医院超声医学科产科超声检查的工作量，分别与2019年2月至5月（2019年同期）和2019年10月至2020年1月（疫情前期）进行比较。不同时期不同妊娠阶段的工作量占比组间比较采用χ²检验。

疫情期超声医学科总工作量同比下降60.1%，环比下降61.3%，产科超声工作量为7684人次，同比下降23.0%，环比下降19.2%。产科超声工作量占全科总工作量的比例大幅上升，并与疫情严重程度呈正相关，2020年2月至5月每月产科超声工作量占比分别为35.8%、15.3%、9.8%和7.4%，其中2月工作量占比同比增长5.0倍，环比增长5.3倍。不同妊娠阶段的超声检查所占比例存在明显变化，孕早期超声检查占比同比下降6.8%，环比下降5.8%，孕晚期占比同比增长5.2%，环比增长3.1%。疫情期转会诊产科超声工作量为301人次，占产科超声总工作量比例为3.9%，与2019年同期（4.1%）和疫情前期（3.4%）相比差异无统计学意义（P＞0.05）。

COVID-19疫情防控期间超声医学科总工作量显著下降，而产科超声工作量占比明显上升。

To explore the changes of obstetric ultrasound workload during the epidemic period of Corona Virus Disease 2019 (COVID-19).

A retrospective analysis was conducted on the obstetrics ultrasound workload at the Department of Ultrasonography of Peking Union Medical College Hospital from February to May 2020 (the epidemic period), which was compared with that from February to May 2019 (the same period in 2019) and from October 2019 to January 2020 (the pre-epidemic period). Chi-square test was used to compare the proportion of workload between different periods and between different stages of pregnancy.

During the epidemic period, the total workload of the ultrasound department decreased by 60.1% and 61.3%, respectively, compared with that in the same period in 2019 and that in the pre-epidemic period. The total number of examinations of obstetric ultrasound was 7684, with a year-on-year decrease of 23.0% and a decrease of 19.2% from the pre-epidemic period. The proportion of obstetric ultrasound workload increased sharply, and was positively correlated with the severity of the epidemic. From February to May 2020, the proportion of obstetric ultrasound workload was 35.8%, 15.3%, 9.8%, and 7.4%, respectively. Among them, the workload proportion in February 2020 increased by 5.0 times year-on-year and 5.3 times than the pre-epidemic proportion. There were significant changes in the proportion of prenatal ultrasound examinations in different stages of pregnancy. The proportion in the first trimester decreased by 6.8% year-on-year, and decreased by 5.8% compared with the pre-epidemic proportion. The proportion in the third trimester increased by 5.2% year-on-year, and increased by 3.1% compared with the pre-epidemic proportion. During the epidemic period, the number of obstetric ultrasound referrals was 301, accounting for 3.9% of the total obstetric ultrasound workload, and there was no significant difference compared with that in the same period in 2019 (4.1%; χ²=0.331, P=0.588) and the pre-epidemic period (3.4%; χ²=2.895, P=0.093).

During the epidemic period of COVID-19, the total workload of ultrasound department declines sharply, while the proportion of obstetric ultrasound workload increases significantly.