When a patient suffers the bloating from intubation of the laryngeal mask airway, how to solve this problem? Maybe an extra gastric lumen will be needed to deliver a stomach tube down to the stomach for the drainage purpose. In this situation, you can choose a double lumen gastric laryngeal mask airway, normally the double lumen LMA is made of medical grade silicone. There are many sizes available for the Infant, Child, and Adult, and they are all sterilized by EO gas in the manufacturer. Product details Double Lumen Gastric Laryngeal Mask Airway Made of medical grade silicone with great compatibility. With gastric lumen for drainage Sizes from #1 to #5 for options Sterilization package for single use only