Chapman D. Anaesthesia 2009; 64(2): 228
This letter is a reply to Baxter (2008). Baxter described two incidents where air was ‘entrained through the suction port’ leading to decreased end-tidal sevoflurane and lightened anaesthesia. This response suggests that the devices in question may not have been inserted fully, meaning that the airway and gastric channels were not isolated from each other. To ensure full insertion takes place, users should make sure that the level of anaesthesia, patient position and insertion method are correct.