Transnasal Sphenopalatine Ganglion Block for Postoperative Pain and Recovery in Tonsillectomy (TONwoPA)

The aim of this clinical trial is to evaluate the effectiveness of transnasal transmucosal sphenopalatine ganglion block in reducing post-tonsillectomy pain. The study also investigates its impact on rescue analgesic requirements and postoperative recovery by comparing 5% lidocaine with placebo. Participants will receive a transnasal transmucosal sphenopalatine ganglion block with either 5% lidocaine or placebo (saline). Postoperative pain levels and opioid consumption will be monitored during the first 24 hours after surgery. In addition, length of hospital stay, the occurrence of primary and secondary post-tonsillectomy hemorrhage up to 14 days, unplanned hospital readmissions after discharge, and patient satisfaction on postoperative day 14 will be assessed.

Inclusion Criteria: * Patients aged ≥ 12 years * Patients weighing ≥ 50 kg * Patients without coagulation disorders * ASA physical status I-II patients scheduled for tonsillectomy * Patients who are fully oriented and able to cooperate Exclusion Criteria: * Lack of informed consent * Patients aged \< 12 years * Patients weighing \< 50 kg * Body mass index (BMI) \> 30 kg/m² * History of allergy to local anesthetics * History of facial trauma or infection * Presence of coagulation disorders * Patients who are disoriented and/or unable to cooperate * Patients with comorbidities requiring opioid use * History of neuropathic pain * Patients with chronic pain syndrome