A review of the bubble technique and other methods for confirming nasogastric tube position in anesthetized patients

Anesthetized patients may have difficulty with the placement and verification of nasogastric tube, which may make insertion more difficult. We recently compared the bubble technique to the conventional method for confirming nasogastric tube insertion in patients under anesthesia and observed that the bubble technique had a greater confirmation rate than the conventional technique. The purpose of this article is to discuss the different techniques for confirming the nasogastric tubes position in the anaesthetized patient, with a special emphasis on the Bubble approach