The aim of this study is to examine the effects of bilateral sphenopalatine ganglion block on surgical conditions, hemodynamics, intraoperative and postoperative analgesic use, recovery characteristics, and postoperative pain during septorhinoplasty under general anesthesia. The study was planned as double-blind, randomized, controlled. 72 patients who will undergo septorhinoplasty surgery will be collected. (g power analysis was performed.) Evaluation of the effectiveness of bilateral sphenopalatine ganglion block was planned. Patients will be divided into 2 equal groups (36 patients). After the induction of general anesthesia, one group (Group: 1) will be administered 8mg dexamethasone and 10mg bupivacaine submucosal, the other group (group:2) will be administered 4 cc saline. aspects will be evaluated.

Inclusion Criteria:

- patients with an ASA score of I-II and between the ages of 17-45 years, who were to undergo general anesthesia with desflurane, were included in the study.

Exclusion Criteria:

• Patients aged <17 and >45 years, patients with liver and/or kidney failure, obese patients (BMI >30), trauma patients, ASA III-IV patients, patients with bleeding disorders, those using drugs that may affect the coagulation system, patients with cardiomyopathy, cerebrovascular disease, immobility, and malnutrition were excluded from the study.