• Chong H Kim, Mohammed A Issa, and Richard M Vaglienti.
• West Virginia University Department of Neurosurgery, Pain Division, Morgantown, WV 26506, USA. kimc@wvuhealthcare.com
• Pain Physician. 2011 Nov 1;14(6):525-30.

BackgroundSpinal cord stimulation (SCS) is an established treatment option for chronic pain. Prior to permanent implantation, temporary trials are performed to evaluate the SCS treatment. Currently there are multiple manufacturers with varying fundamental differences in delivery and resultant paresthesias. However, trials are typically limited to one manufacturer for the patient to evaluate.ObjectiveTo evaluate the role of the Observational Mechanical Gateway (OMG) Connector for patients undergoing SCS trials.Study DesignRetrospective cohort design study. Patients undergoing SCS trials were offered at the end of the 7 day trial to experience stimulation using the OMG Connector.SettingAcademic university-based pain management center.MethodParticipants were trialed using the OMG Connector at the end of the 7 day spinal cord stimulation trial. Data based on participants' preference were collected.ResultsThe average pain score at baseline was 7.3 on a 10-point scale overall, with improvement during the SCS trial to 2.9 overall; 3.5 in Medtronic (MT); and 2.4 in St. Jude (SJ) SCS trials (P = 0.04). The average pain score with OMG was 2.6 overall; 2.8 in MT; and 2.4 in SJ (P = 0.28). In terms of overall coverage of pain distribution, paresthesia and overall satisfaction, the P values were 0.24, 0.21 and 0.33 respectively. Overall, 12 of 16 participants underwent permanent implantation. One of the 4 failed trials was successfully retrialed with the OMG Connector.Limitations  Small sample of participants and the duration of the OMG Connector trial.ConclusionsThe OMG Connector offers patients another opportunity to better access the available treatment options during the SCS trial period.

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