Direct Sciatic Nerve Electrical Stimulation for Complex Regional Pain Syndrome Type 1.

Area of Science:

• Neurology
• Pain Management
• Medical Devices

Background:

• Complex Regional Pain Syndrome (CRPS) often causes debilitating foot and leg pain.
• Conventional treatments and spinal cord stimulation (SCS) may not fully alleviate pain, especially in the foot.
• Neuromodulation offers potential for managing refractory CRPS pain.

Purpose of the Study:

• To evaluate the efficacy of direct sciatic nerve electrical stimulation (DISNES) for intractable foot and leg pain in patients with CRPS I.
• To compare DISNES outcomes with previous SCS treatments in a subset of patients.
• To assess the impact of DISNES on pain, disability, quality of life, and autonomic features.

Main Methods:

• A cohort of 16 patients with CRPS I and intractable foot/leg pain underwent ipsilateral DISNES.
• Patients had previously failed conventional medical management; 7 had prior SCS treatment.
• Outcomes were measured using Visual Analog Scale (VAS), Oswestry Disability Index (ODI), EQ-5D, and SF-36 scores.

Main Results:

• Significant reductions in VAS pain scores (59% at F/U 1, 46% at F/U 2) and ODI (40% at F/U 1, 37% at F/U 2) were observed.
• Quality of life scores (SF-36, EQ-5D) showed significant improvements.
• Rapid resolution of autonomic symptoms (edema, hyperemia, allodynia) within 7-10 days occurred; 3 patients returned to work.

Conclusions:

• DISNES is effective in managing disabling foot pain associated with CRPS I.
• The technique improves quality of life, ambulation, and reduces disability in CRPS patients.
• DISNES also alleviates autonomic features and dystonia, though further long-term studies are warranted.