Ultrasound-Guided Internal Superior Laryngeal Nerve Block for Double-Lumen Bronchial Tube

Inclusion Criteria: * ASA 1 to 3 Exclusion Criteria: * patients who did not provide consent * with a pre-existing sore throat, hoarseness and upper respiratory tract infection * tracheal pathology, tracheostomy * a history of psychosis, diabetes and thyroid, oral cavity or pharynx surgery * known or suspected allergy to ropivacaine * chronic opioid use * use of nonsteroidal anti-inflammatory drug medication within 24 hours * known or suspected difficult airway * patients who will be supported by tube ventilator after the operation.