Emergence agitation; generally refers to a situation that may occur after a surgical intervention or anesthesia. This situation describes the irritability and agitation of the patient during the recovery process and the period of recovery from anesthesia. Recovery agitation may occur when the patient begins to recover and is usually a short-term condition. It resolves spontaneously. However, in some cases, this agitation may be more pronounced and disturbing. This may affect the patient's condition and relaxation. Rapid recovery from anesthesia in the clinic is also a risk factor for agitation.

When the literature is examined, there are not enough studies on Bis suppression ratio and its relationship with recovery agitation is not yet known enough. For this purpose, our study aimed to question this relationship.

There are not enough studies on BIS suppression ratio, and its relationship with recovery agitation is not yet well known. For this purpose, our study aimed to question this relationship.

For this purpose, patients' post-anesthesia recovery scores and perioperative BIS and BIS suppression rates will be compared.

Inclusion Criteria:

• Patients with ASA score 1,2,3
• Patients to be extubated in the postoperative operating room
• Patients without known vascular diseases will be included.

Exclusion Criteria:

• Intraoperative surgery or aesthesia complication developments
• Those who need postoperative intensive care
• Patients who are not planned to be extubated in the operating room

Patients over the age of 18 who will undergo lumbar spine surgery and will be operated under general anesthesia constitute the study population.

Sharing of data is prohibited without written permission from the institution where the research was conducted.