Maximal Analgesic Effect Attained by the Use of Objective Neurophysiological Measurements With Closed-Loop Spinal...

Area of Science:

• Neuroscience
• Biomedical Engineering
• Pain Management

Background:

• Spinal cord stimulation (SCS) therapy optimization is hindered by a lack of neurophysiologic data.
• Current trial-and-error programming leads to suboptimal and variable therapeutic outcomes.

Purpose of the Study:

• To identify neurophysiologic dose metrics and their optimal ranges for spinal cord stimulation.
• To establish an evidence-based regimen for optimizing SCS clinical benefit.

Main Methods:

• Analysis of physiologic metrics from 180 subjects across 3 clinical studies with severe chronic pain.
• Maximal analgesic effect (MAE) defined by pain reduction or cumulative responder score (MCIDs) within 3 months post-SCS implant.

Main Results:

• A neural dose regimen with high accuracy (2.8μV) and dose ratio (1.4) yielded significant pain reduction (79±1%) and MCIDs (12.5±0.4).
• No significant differences in MAE or neurophysiological dose metrics were found between trial and post-implant phases.

Conclusions:

• An evidence-based neural dose regimen is now available for neurostimulation interventions.
• This regimen facilitates optimization of clinical benefit, adherence monitoring, and therapy management.