Flow chart of the present study. There were 1707 patients who were diagnosed with intussusception using US. We excluded 1461 patients who did not meet the inclusive criteria and ultimately enrolled 246 ones in this study. There were 90 patients in Control Group (pre-pandemic), 70 patients in Study Group 1 (pandemic), and 86 patients in Study Group 2 (“post-pandemic”). A: Refers to patients with intussusception combined with other acute abdominal diseases, such as appendicitis, pancreatitis, and intestinal obstruction of unknown origin. B: Refers to patients with intussusception receiving X-ray-guided pneumatic enema reduction, direct surgical treatment, and other non-invasive therapies. Note: US = ultrasound.