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Τετάρτη 16 Νοεμβρίου 2022

Cervical Dorsal Root Ganglion Stimulation for Complex Regional Pain Syndrome: Technical Description and Results of Seven Cases

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Abstract

Introduction

Complex regional pain syndrome (CRPS) is characterized by nociplastic pain with alterations in sympathetic function. Neuromodulation could be a useful alternative therapy option. Dorsal root ganglion (DRG) stimulation has demonstrated better results than conventional spinal cord stimulation (SCS) for patients with CRPS in lower limbs.

Methods

We report a case series of seven patients treated with cervical DRG stimulation for CRPS of the hand that required neuromodulation for pain relief, after no response with other analgesic techniques (medication and interventional). We report retrospective data collection of seven consecutive patients with a one year follow up.

Results

Seven patients were trialed, and six were implanted with a permanent pulse generator after achieving more than 50% pain relief during two to seven days of trial phase. The average pain relief (rated on a standard 100 mm visual analog scale) after one year of treatment was 64.3% ± 16.6. No major complications were observed during a one year follow up.

Discussion

The results for cervical DRG stimulation are similar to other DRG stimulation studies for the treatment of refractory CRPS at lower levels. The cervical DRG implant technique guided with C-arm fluoroscopy and under conscious sedation could be a safe and effective option for relieving pain of the upper limbs CRPS. Monitoring neural status is required for cervical DRG stimulation either with a responder awake patient or with intraoperative neural monitoring in non-responder patients.

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