Steps of the nasal sinus negative pressure replacement therapy

Under normal circumstances, a laryngoscope is inserted through the nasal cavity into the pharynx using a thin, flexible tube equipped with an endoscope, allowing examination of the mucosa of the nose and pharynx for any obvious abnormalities. The specific procedure is as follows:

1. The patient should fast for at least 8 hours prior to the examination.

2. Apply topical anesthetic spray to the patient's oropharynx and laryngopharynx.

3. Ten minutes later, have the patient sit upright and disinfect their face.

4. Insert the laryngoscope through the patient's nasal cavity into the pharynx to examine the mucosa and related structures of the throat.

5. Capture images during the procedure.

6. Remove the laryngoscope, wipe the patient's face dry, and complete the procedure.

After the examination, the patient should temporarily refrain from eating, and avoid spicy, stimulating, or hard foods on the same day. Laryngoscopy should be performed at a reputable medical facility by a qualified healthcare professional.