Muscle Relaxants on Efficacy of LMA Insertion

Comparison of the Clinical Performances of Flexible Laryngeal Mask Airway in Pediatric Patients Under General Anesthesia With or Without Muscle Relaxant: a Randomized Controlled Non-inferiority Trial

The use of laryngeal mask airway (LMA) is increasing in pediatric anesthesia because it provides lesser direct mechanical stimulation of the airway due to being placed above the larynx. However, LMA insertion can be more difficult in children than in adults due to their unique characteristics of pediatric airway. Neuromuscular blocking agents, so-called, muscle relaxants have long been used to facilitate insertion of airway devices. But there are pros and cons for the efficacy of muscle relaxants in LMA insertion, and most studies were investigated in adults.

Inclusion Criteria:

• Children aged between 2 and 7 years of American Society of Anesthesiologists physical status (ASA PS) I or II who are planned to receive ophthalmic surgery under general anesthesia

Exclusion Criteria:

• Refusal of consent
• Present URI or other respiratory symptoms
• Oro or facial anomaly
• Poor dental condition
• who cannot open their mouth or limited mouth opening
• when the tracheal intubation is definitely needed