Effect of ESPB on Intraoperative Remifentanil Consumption
In recent years, regional anesthesia techniques have also been frequently applied to patients for pain relief. Erector spinae plane block (ESPB), is among the regional anesthesia techniques frequently used in lumbar spine surgery.

General anesthesia (GA) is the main method of anesthesia for lumbar spine surgery. However, GA can only inhibit the projection system of the cortical limbic system or hypothalamic cortex. GA cannot completely block the transmission of peripheral noxious stimulus to the central nervous system and cannot effectively inhibit the intraoperative stress response. With the addition of peripheral blocks such as ESPB, lower remifantanil consumption, and more stable hemodynamics are expected by providing preemptive analgesia in patients.

As a result of all these; it was aimed to compare the intraoperative remifantanil consumption of patients who underwent preoperative ESPB in patients who will undergo lumbar spine surgery resection under GA with those who underwent postoperative ESPB.
- EligibilityCriteria: Inclusion Criteria:  18 to 65 years old ASA physical status I-II-III BMI 18 to 40 kg/m2 Elective LDH surgery  Exclusion Criteria:  Patient refusing the procedure Patients who have previously undergone spinal surgery Chronic opioid or analgesic use Patients who will operate under emergency conditions Patients who will not undergo LDH surgery - HealthyVolunteers: No - Gender: All - MinimumAge: 18 Years - MaximumAge: 65 Years - StdAgeList: Adult, Older Adult