Dr Kola Tytler MBBS CertHE MBA MRCGPClinical Lead • iatroXYou should consider referring an adult patient for a tonsillectomy due to obstructive sleep apnoea/hypopnoea syndrome (OSAHS) if they have large obstructive tonsils and a body mass index (BMI) of less than 35 kg/m² NICE NG202.View Clinical Reasoning & Logic Key ReferencesNG202 - Obstructive sleep apnoea/hypopnoea syndrome and obesity hypoventilation syndrome in over 16s