Background and aims:
Patients using SCS systems who have endured problems with device longevity and/or loss of efficacy may be able to achieve better outcomes utilizing newer technologies that offer an increased variety of waveforms and programming options to address their chronic pain. In this retrospective study, we examined the outcomes of previously-implanted patients who went on to use a commercially-available adaptor enabling connection to an SCS system that offers multiple neurostimulation based treatment approaches to regain and maintain efficacious therapy.

Materials / Methods: 
This is a real-world, retrospective study of patients who were previously implanted with an SCS system (commercially-available SCS device, Abbott) who then went on to utilize an adaptor (Precision S8, Boston Scientific) to connect to a new SCS system capable of multiple modality stimulation and/or combination therapy. Pain relief and other associated outcomes with both previously-implanted SCS systems and newly connected commercially¬ available systems (Boston Scientific) are being collected.

Results:
Data from a total of 8 patients who provided all pain scores have been collected and analyzed to date. Six of 8 patients utilizing a device adaptor reported better pain relief after connection to and use of a multiple waveform SCS system (i.e. pain scores after using current versus previous system at post-baseline follow-up assessment). A mean 4.7 ± 1.9 point improvement was reported using the current system versus a 2.3 ± 2.8 point improvement using the previous system. Data from additional patients in this ongoing case-series will be presented. 

Conclusions:
In this small, multi-center case-series, no patients reported better pain relief using the previous system versus their current system (multiple waveform SCS) when using a device adaptor. The results of this preliminary study suggest that offering previously implanted SCS patients a system capable of providing multiple waveforms can improve pain relief.

OUTCOMES FOLLOWING UTILIZATION OF A DEVICE ADAPTOR IN PREVIOUSLY-IMPLANTED PATIENTS USING SCS FOR CHRONIC PAIN