To Study the Application of Bedside Ultrasound in Gastric Tube Placement and Determination of the Position of the End of the Gastric Tube in Children Aged 0 to 6 Years With Congenital Heart Disease

Bedside blind insertion is the most common method for gastric tube indwelling in clinical practice. The key problem is that the position of the tube cannot be accurately determined in real time.Bedside ultrasound has become a common medical technology, and resources are easy to obtain. Therefore, bedside ultrasound has the advantages of fast, accurate, real-time repeatable, and non-invasive in determining the position of the end of the indwelling gastric tube.The purpose of this study is to investigate the accuracy of bedside ultrasound in guiding gastric tube placement and judging the position of the end of the tube in children with CHD aged 0-6 years. To explore the feasibility and effectiveness of bedside ultrasound guided gastric tube placement during perioperative period in children with congenital heart disease (CHD), this study plans to procedure the prospective randomized controlled study.