The Relationship Between Upper and Lower Extremity Blood Pressure in Thyroid Surgery Patients Under General Anesthesia

Brief Summary

The goal of this observational study is to clarify the relationship between upper and lower limb blood pressure in thyroid surgery patients under general anesthesia. The hemodynamic state during anesthesia is different from that during the awake state. Therefore, to assess whether the difference in blood pressure between the upper and lower limbs observed in the awake state is consistent with that observed under general anesthesia, the investigators will compare the inter-limb blood pressure differences before anesthesia induction and during general anesthesia.