Patient Information Sheets Septoplasty - Operation to correct defects or deformities of the nasal septum, to relieve nasal obstruction. Endoscopic Dacrocystorhinostomy (EDCR) - Surgical fistulization of the lacrimal sac for external drainage of an obstructed nasolacrimal duct. Ventilation Tubes (Grommets) - Grommets are very small ventilation tubes inserted into the tympanic membrane (ear drum) to improve the ventilation of the middle ear. Tonsillectomy and Adenoidectomy - Surgical removal of tonsils and/or adenoids or a tonsil. Endoscopic Sinus Surgery - The aim of this operation is to restore normal function to the diseased sinuses. Rhinoplasty - Plastic surgery of the nose to correct deformity or to replace lost tissue. Botox