The average threshold to evoke a bilateral EMG response using single site DeRidder Burst was 3.2 mA. The thresholds for EMG recruitment with DeRidder Burst differed across patients owing to anatomic and physiological variations. Evoked responses were compared across multiple trials of burst stimulation in which the number of independent burst areas were varied. Subdermal electrode needles were placed into lower extremity muscle groups, in addition to the rectus abdominis muscles, for EMG recording. Each patient underwent the surgical placement of a Penta Paddle electrode via laminectomy at the T8-T10 spinal levels. Neuromonitoring was performed during permanent implant of SCS leads in nine patients diagnosed with chronic intractable back and/or leg pain. This study aimed to identify the effect of intraburst frequency, multiarea stimulation, and location of DeRidder Burst on the evoked electromyography (EMG) responses. Multiarea DeRidder Burst programming is a new option to treat multisite pain by delivering stimulation to multiple areas along the spinal cord. This can provide challenges in effectively programming stimulation and long-term therapy efficacy. However, nearly 80% of patients have two or more noncontiguous pain areas. Burst spinal cord stimulation (SCS) has shown superior relief from overall pain and a reduction in back and leg pain compared with traditional tonic neurostimulation therapies.

Emg of spine