Evaluation of CRPS Patients Using an SCS System with Multiple Waveform and Stimulation Frequency Options

Introduction: A recent study demonstrated that strikingly different frequencies and waveforms were preferred by individual patients using spinal cord stimulation (SCS) for treatment of complex regional pain syndrome (CRPS) [1]. To further verify and expand upon this work, we assessed clinically diag...

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Published in:Pain medicine (Malden, Mass.) Mass.), 2019-03, Vol.20 (3), p.652
Main Authors: Atallah, Joseph, Han, John J, Pyles, Stephen T, Metzger, Clark S, Hammond, M. Blake, Washabaugh, Edward P, Pei, Yu, Lechleiter, Kristen, Jain, Roshini
Format: Article
Language:English
Subjects:
Care and treatment
Complex regional pain syndromes
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Summary:Introduction: A recent study demonstrated that strikingly different frequencies and waveforms were preferred by individual patients using spinal cord stimulation (SCS) for treatment of complex regional pain syndrome (CRPS) [1]. To further verify and expand upon this work, we assessed clinically diagnosed CRPS patients implanted with a newer-generation SCS system that provides for multiple waveform and stimulation frequency options. Methods: All eligible patients of this real-world case series were diagnosed with CRPS and implanted with a multiple-waveform SCS system (Precision Spectra, Boston Scientific). Assessments of (or related to) pain relief over time are actively being conducted, as captured from retrospective chart review. Additionally, documentation of waveforms and/or stimulation frequencies utilized during the duration of treatment will be presented. Institutional review board-approved waivers of consent were obtained for this case series evaluation. Results: The mean numerical rating scale scores at baseline and last follow-up (mean duration = 389 days) were 7.6 and 3.7, respectively ([DELTA] = 3.9, P < 0.0001), for 35 patients. Eighty-one percent of patients (17/21) reported >50% improvement at their last follow-up, and 38% (8/21) reported 91-100% pain relief at last follow-up. Updated data will be presented. Conclusions: The ability to provide various options within a single SCS device is thought to be helpful in avoiding loss of efficacy due to adaptation or other modes of disease plasticity over time. This study seeks to add to the overall compendium of data investigating SCS-implanted patients with CRPS who have access to multiple options that enable individually selected use of various waveforms and/or stimulation frequencies. Reference: 1) Kriek N, et al. Eur J Pain 2017;21(3):507-19.
ISSN:1526-2375