The air enema procedure for reducing intussusception is relatively safe and is widely used in clinical practice due to its maturity as a technique, but it does impose a time constraint on the patient's condition. It's like a myocardial infarction needing urgent treatment within a certain number of hours; otherwise, the effectiveness is greatly reduced or even null.
Specifically, clinical cases have been statistically analyzed. The data shows that this method is most successful when used within 24 hours of the onset in children, with a success rate of over 90 percent. Beyond 24 hours, there is some effect within 48 hours. After 48 hours, the intussusception site is close to necrosis, and using air at this point is basically ineffective, necessitating surgery. Therefore, Xie Wanying emphasized the need to seize the last window period within 48 hours.
