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

Effect of Ultrasound-Guided Internal Superior Laryngeal Nerve Block on Sore Throat After Intubation by Double-Lumen Bronchial Tube for Thoracoscopic Surgery

investigate the effectiveness and safety of ultrasound-guided bilateral internal branch of the SLN (iSLN) block for alleviating POST immediately after the operation.

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.