A nasendoscopy is a thin, flexible tube with a camera at the end is used to look at the back of your mouth, nose, throat (pharynx) and larynx. The procedure can be uncomfortable, so before the procedure you’ll be asked whether you’d like anesthetic sprayed on the back of your throat.

You will be asked to sit upright with a headrest behind your head. The endoscope is inserted gently into one of your nostrils. The endoscope is then pushed slowly up through your nasal cavity, down through your throat (pharynx) and to just above your voice box (larynx). The clinician looks at the images from the endoscope (with an eyepiece or on a screen) to spot any abnormal areas in the nose, throat, or voice box. During the test you may be asked to perform several movements. These may include puffing out your cheeks, talking, swallowing some coloured water or poking out your tongue. These can make it easier to spot some types of abnormalities in the nose, throat, or voice box.

Sometimes, the clinician may take one or more small samples (biopsies) of parts of the inside lining of the nose, throat or voice box – depending on why the test is done and what they see. Once all of the important areas have been inspected, the nasoscope is then gently pulled out of the nose. A nasoendoscopy can be done in less than a minute, but may take a few minutes longer in some cases. Having a nasoendoscopy can be uncomfortable. It doesn’t usually hurt. Tell the clinician if you are in pain during the procedure, or if you want them to stop.