A 2-year-old boy was examined by a surgeon on duty for an infringement of an inguinal hernia for 30 hours. The surgeon had an operation during which the hemial protrusion settled on its own. Then the plastic of the inguinal canal was performed according to the Martynovs. 1. What is the doctor’s mistake? 2. What stages of the operation needed to be completed? 3. What complications may arise? 4. What is the postoperative management of the patient?