The Effect of Erector Spinae Plane Block in Combination With Physical Therapy on Pain, Disability, and Quality of Life in Patients With Degenerative Scoliosis: Prospective, Randomized, Clinical Study

Patients over 60 years of age, with low back or low back-leg pain for at least 3 months, who had received pharmacologic treatment but did not respond, and diagnosed with degenerative lumbar scoliosis are included in the study. Patients are randomized into to groups according to the interventions as: physical therapy group (G-1) and physical therapy and ESPB injection group (G-2). The physical therapy program is planned as a total of 15 sessions in the lumbar region, each session consisting of TENS (50-100 Hz stimulation frequency, 200 µs pulse duration, intensity is increased as much as the patient could tolerate, 20 minutes in total), hotpack (to be placed on the painful area, 20 minutes), US (1 mHz frequency, 10 minutes, 1.5 watt/cm2 intensity). Ultrasound-guided lumbar ESPB is performed using an in-line cephalic approach, and after contacting the corner of the L3 transverse process, a small dose of saline is injected into the fascial space between the L3 transverse process and the erector spinae muscles to "lift off" the fascia. After verification, a mixture of 20 mL of 1% lidocaine and 3 mg betamethasone are administered for unilateral injection. The procedure is performed bilaterallyThe primary endpoint of the study is pain intensity assasment by using a numerical rating scale (NRS), and secondary endpoints are functional status, quality of life and disability status assasment by using SRS-22 and Oswestry disability index. Patients are evaluated before and 1 week, 1 month and 3 months after treatment. In the 2nd group, pain intensity at 1 hour after injection is additionally evaluated with a NRS. As a result of the power analysis, the minimum sample size was planned as a total of 16 patients with 8 patients in each group with a 15% dropout rate. Shapiro Wilk test is applied to examine the normality of the data distribution. The difference between groups is evaluated by Mann Whitney U according to normal distribution and by ANOVA for time-dependent within-group change.