Inhaling Penehyclidine to Prevent Perioperative Respiratory Adverse Events in Children at Risk Undergoing Sevoflurane Anesthesia

The penehyclidine hydrochloride will be diluted to a total volume of 5 mL with normal saline, added to the nebulizer cup for inhalation. Patients will be asked to inhale the entire volume of nebulized drugs within 30 min prior to surgery. The trial drugs will be administered using a jet nebulizer with compressed air flow. Each child will be intructed to begin the nebulization by using a face mask that covers the nose and mouth while the child is seated upright. Children will be encouraged to take deep and slow breaths, inhaling through the mouth and exhaling through the nose, to ensure the drugs effectively reaches the airway.

The normal saline with a total volume of 5 mL will be added to the nebulizer cup for inhalation. Patients will be asked to inhale the entire volume of nebulized drugs within 30 min prior to surgery. The trial drugs will be administered using a jet nebulizer with compressed air flow. Each child will be intructed to begin the nebulization by using a face mask that covers the nose and mouth while the child is seated upright. Children will be encouraged to take deep and slow breaths, inhaling through the mouth and exhaling through the nose, to ensure the drugs effectively reaches the airway.