Objective To explore the clinical value of sequential ultrasonography in critically ill patients with CoronaVirus Disease 2019（COVID-19）.Methods Two hundred and thirty-two critically ill patients with COVID-19 who underwentultrasonography in our hospital were selected

the ultrasonography items and the results were and analyzed retrospectively.Results Ultrasonography items of critically ill patients with COVID-19 included bedside echocardiography（181 cases）

thoracic ultrasound（131 cases）

hepatobiliary pancreas spleen ultrasound（134 cases）

kidneys and ureter ultrasound（125 cases）

lower extremity arteries and deep vein ultrasound（75 cases）

abdominal large vessel ultrasound（51 cases）

cervical vascularultrasound（14 cases）

uterus and its accessories ultrasound（4 cases）

submandibular gland ultrasound（2 cases）

bladder andprostate ultrasound（2 cases）

thyroid ultrasound（24 cases）

adrenal ultrasound（22 cases）

testicles and epididymal ultrasound（1 case）.The positive rates were 92%

100%

87%

68%

81%

61%

43%

75%

50%

50%

75%

9% and 100%

respectively.Conclusion Sequential ultrasonography plays an important role in the diagnosis and treatment of critically ill patients withCOVID-19.