Objective To evaluate the application value of whole-course dynamic monitoring of ultrasound in thetreatment of nasal bone fracture in children.MethodsForty-eight children with nasal bone fracture were selected.Ultrasound and CT examination were used before operation. Ultrasound were performed to monitor dynamically the position of pesetter

reduction of fracture and nasal packing during operation

the implementation time of manual reduction

secondary manualreduction rate

number of CT scans

CT score

nasal ventilation score

etc.

were recorded.ResultsForty-eight cases were alltreated with manual reduction under general anesthesia

the average preoperative time was（22 ± 6）h

the average hospitalizationtime was（4.5±1.6）d

and no secondary manual adjustment was performed.The average number of CT scans was 2 times perperson.48 cases had preoperative CT score of less than 2 points

47 cases had postoperative CT score of more than 2 points

9 cases had preoperative nasal ventilation score of more than 5 points

47 cases had postoperative CT score of more than 5 points

the differences were statistically significant（both P<0.05）.Conclusion Closed reduction of nasal bone fracture in childrenunder whole-course dynamic monitoring by ultrasound can shorten the time of manual reduction

improve the treatmentefficiency

and help clinically complete diagnosis and treatment.