"Extraglottic devices" are another family of supraglottic devices that are inserted through the mouth to sit on top of the larynx"." Extraglottic devices are used in the majority of operative procedures performed under general anaesthesia. Compared to a cuffed tracheal tube, extraglottic devices provide less protection against aspiration but are more easily inserted and causes less laryngeal trauma. Limitations of extraglottic devices arise in morbidly obese patients, lengthy surgical procedures, surgery involving the airways, laparoscopic procedures and others due to its bulkier design and inferior ability to prevent aspiration. In these circumstances, endotracheal intubation is generally preferred. The most commonly used extraglottic device is the laryngeal mask airway (LMA). An LMA is a cuffed perilaryngeal sealer that is inserted into the mouth and set over the glottis. Once it is in its seated position, the cuff is inflated. Other variations include devices with oesophageal access ports, so that a separate tube can be inserted from the mouth to the stomach to decompress accumulated gases and drain liquid contents. Other variations of the device can have an endotracheal tube passed through the LMA and into the trachea.