Abstract:Objective To investigate the clinical application value and safety of magnetically controlled capsule gastroscopy (MCCG) in gastric and duodenal examination of children in comparison with conventional gastroscopy. Methods Data of 160 outpatients or inpatients with abdominal pain accompanied by Helicobacter pylori infection aged 8-16 who underwent either MCCG or conventional gastroscopy in Shanghai Children''s Hospital from March 2020 to March 2022 were retrospectively analyzed. Children were divided into the MCCG group (n=80) and the conventional gastroscopy group (n=80) according to different examination methods. The detection and examination time of lesions in upper gastrointestinal tract, tolerance and safety between the two groups were analyzed. Results MCCG was successfully performed in 79 children and conventional gastroscopy was successfully performed in 78 children, respectively. The positive detection rates were 1.3% (1/79) and 1.3% (1/78) in the esophagus (χ2=0.000, P>0.999), 87.3% (69/79) and 91.0% (71/78) in the stomach (χ2=0.552, P=0.327) , 15.2% (12/79) and 19.2% (15/78) in duodenum (χ2=0.450, P=0.533) with no significant difference between the two groups. There was no significant difference in the examination time [72.0 (41.0, 109.5) min VS 6.0 (4.3, 7.0) min,U=24,P<0.001] in the MCCG group and the conventional gastroscopy group. No adverse event occurred in either group. Conclusion There is no significant difference in the detection rate of gastric and duodenal lesions between the MCCG group and the conventional gastroscopy group. MCCG is safe and stable, and can be used as an diagnostic tool for gastric and duodenal diseases in children.