Prediction Accuracy for Langeal Mask Unique TM Size in Pediatric Patient

sixty-six pediatric subjects aged between 1 - 10 years old underwent general anesthesia using laryngeal mask Unique TM. Laryngeal mask inserted using the size based on subject's weight. Effectivity was confirmed if there is no air sound from patient's mouth, airway seal pressure ≥20 cmH2O, maximum inspiration pressure was ≤ 20 cmH2O, difference in expiration and inspiration tidal volume less than 5%, and there is no cuff appear in mouth.