In spite that variable techniques for lumbar MBRF exists, the tunnel vision technique is widely recommended for exact radiofrequency needle placement. However, this method uses the concept of a steep caudocephalad axial tilt of the fluoroscopy beam, which result in unusual appearance of vertebral structures and a long distance from skin to the target site. In our institution, therefore, the investigators have used a modified method that is easy and safe to place RF needle parallel to the lumbar medial branch in oblique fluoroscopic view. Accordingly, our objectives were to evaluate our modified technique for lumbar MBRF, comparing with the tunnel vision technique, and additionally to assess complications with respect to these two techniques.
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numerical rating scale (NRS)(1)
Timeframe: change from baseline in NRS at 4 weeks