During the procedure

The test needs to be done under sedation - a ‘cannula’ (plastic needle) will be inserted into your hand or arm to give you a sedative; this will make you feel comfortable and relaxed. Following sedation many patients may not remember anything about the test.

Some anaesthetic spray will be gently sprayed on the back of your throat, and some gel placed into your nostrils. There may be a different sensation to breathing and swallowing after this spray as the throat becomes ‘frozen’ – this is normal. You will be able to breathe and swallow normally, although it may feel different. You can cough and swallow if you wish during the test.

You will lay on your back for the test, a plastic mouthguard will be put into your mouth to protect your teeth and gums from the camera. The procedure takes around an hour, depending on how many samples are taken.