The goal of this clinical trial is to evaluate the application of intravenous contrast-enhanced ultrasound examination in children with intra-abdominal diseases that require clear diagnoses. The main questions it aims to answer are: * Is intravenous contrast-enhanced ultrasound helpful for the diagnosis of intra-abdominal diseases in children? * What medical problems do participants have when participating in intravenous contrast-enhanced ultrasound examination? * How can ultrasound doctors conduct intravenous contrast-enhanced ultrasound examinations in a standardized manner? Researchers will performing intravenous contrast-enhanced ultrasound examinations on participants and collecting research subjects to establish a multicenter clinical data database. Participants will: * Perform abdominal ultrasound examination to assess the condition. * At least conduct one intravenous contrast-enhanced ultrasound examination. Based on the result of the contrast examination, decide whether to conduct another examination. * Keep a diary of their symptoms and therapeutic process in 30 days.
Study Type
OBSERVATIONAL
Enrollment
108
to evaluate the the application of contrast-enhanced ultrasound examination in children with intra-abdominal diseases that require clear diagnoses aged from 29 days to 18 years old
perform contrast enhanced ultrasound (CEUS) using Sonovue as the contrast agent
Children's Hospital, Zhejiang University School of Medicine
Hangzhou, Zhejiang, China
RECRUITINGsensitivity
to calculate the sensitivity of venous contrast-enhanced ultrasound examination in children
Time frame: Thirty days after the last venous ultrasound contrast examination
specificity
to calculate the specificity of venous contrast-enhanced ultrasound examination in children
Time frame: Thirty days after the last venous ultrasound contrast examination
Positive predictive value
to calculate the positive predictive value of venous contrast-enhanced ultrasound examination in children
Time frame: Thirty days after the last venous ultrasound contrast examination
Negative predictive value
to calculate the negative predictive value of venous contrast-enhanced ultrasound examination in children
Time frame: Thirty days after the last venous ultrasound contrast examination
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