In sinus endoscopy, an endoscope is inserted into the nose, and the interior of the nasal passages, the sinuses, and the throat are examined.

This procedure can be done in a physician's office. The endoscope is inserted into a nostril and is threaded through the sinus passages to the throat.

To make viewing of these areas easier, and to record the areas being examined, a camera, monitor, or other similar viewing device is connected to the endoscope.