1. 2016;19;39-48Randomized Controlled Study of Percutaneous Epidural Neuroplasty Using Racz Catheter and Epidural Steroid Injection in Cervical Disc Disease
   Randomized Trial
   Guy Yeul Ji, MD, Chang Hyun Oh, MD, Keun Su Won, MD, PhD, In Bo Han, MD, PhD, Yoon Ha, MD, PhD, Dong Ah Shin, MD, PhD, and Keung Nyun Kim, MD, PhD.

BACKGROUND: The efficacy of lumbar percutaneous epidural neuroplasty (PEN) as a minimally invasive technique has been relatively well investigated, but the clinical effectiveness of cervical PEN (C-PEN) has yet to be established.

OBJECTIVE: The purpose of this study was to compare clinical outcomes between C-PEN and cervical epidural steroid injection (C-ESI).

STUDY DESIGN: Randomized control study.

SETTING: University hospital center.

METHODS: Eighty patients with neck pain from single level cervical disease with and without radiculopathy were included in this study. Patients were randomly assigned into 2 groups: C-PEN or C-ESI. Clinical outcomes were assessed according to Neck Disability Index (NDI) score and Visual Analog Scale (VAS) score for arm pain until 12 months after treatment.

RESULTS: All C-PEN and C-ESI groups showed better NDI recovery and greater reduction in VAS score at postoperative 6 months (P < 0.001). The C-PEN group demonstrated better NDI score at postoperative 6 months than the C-ESI group (P = 0.014), while there were no differences at 2, 4, and 12 months. Additionally, the C-PEN group showed lower VAS scores at all follow-up intervals compared to the C-ESI group (P < 0.050). Symptom relief was sustained for a significantly longer duration in the C-PEN group than in the C-ESI group (23.4 vs. 20.5 weeks, P < 0.001).

LIMITATIONS: The follow-up period was relatively short with a small sample size, and the grade of cervical disc disease, root compression, and disc degeneration grade were could not considered in this study.

CONCLUSIONS: C-PEN was superior to C-ESI in terms of better NDI recovery (at 6 months) and greater reduction in VAS score (until 12 months) in treating single level cervical disc herniation. Better outcomes with C-PEN may have been achieved via a more localized selective block in the epidural space closer to the dorsal root ganglion and ventral aspect of the nerve root.