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Neuromodulation ; 19(2): 179-87, 2016 Feb.
Article in English | MEDLINE | ID: mdl-26890015

ABSTRACT

OBJECTIVE: This longitudinal, clinical outcome study was a multicenter, prospective, observational, registry with a 24-month assessment of patients implanted with spinal cord stimulation (SCS) systems for the management of chronic pain of the trunk and/or limbs. METHODS: On informed consent and institutional review board approval, 614 patients from 39 sites were enrolled within 30 days following permanent SCS system implantation. Medication usage, patient-reported pain relief (PRP), categorical ratings of pain relief, pain disability index scores (PDI), quality of life (QoL), and patient satisfaction were assessed at enrollment, 3-, 6-, 12-, 18-, and 24-month postimplant. Device-related adverse events (AEs) were recorded and reported. RESULTS: Across all visits, statistically significant improvements were reported on all outcome measures. Mean PRP was 58.5% (± 26.4) at 3 months, 56.8% (± 29.2) at 6 months, 57.7% (± 28.9) at 12 months, 55.6% (± 29.8) at 18 months, and 56.3% (± 30.3) at 24 months. More than 65% of patients at any visit reported a PRP ≥ 50%. Mean PDI scores reduced from 46.9 points at baseline to 32.7, 31.8, 31.5, 32.1, 32.1 points at 3, 6, 12, 18, and 24 months (p ≤ 0.0001), respectively. Greater than 76% of patients at any visit were satisfied with their therapy. The majority of patients categorized pain relief as excellent or good on a 5-item scale and reported overall QoL as greatly improved or improved on a 5-item scale. An average of 88% of patients stopped, decreased, or did not change dose of narcotics/opioids. The most common AE was diminished or loss of pain relief in 11.4% of enrolled patients. CONCLUSIONS: Most patients experienced substantial pain relief and a significant improvement in all outcome measures. These results further support the safety, efficacy, and sustainability of SCS in clinical practice.


Subject(s)
Chronic Pain/therapy , Product Surveillance, Postmarketing , Recovery of Function , Registries , Spinal Cord Stimulation , Female , Humans , Longitudinal Studies , Male , Patient Satisfaction , Treatment Outcome
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