Percutaneous Extraforaminotomy using BS extraforamonotomy kit(BioSpine Co.,Ltd, Seoul, South Korea), was performed in patients who did not show improvement lasting more than 1 month after diagnostic conventional fluoroscopically guided transforaminal epidural block with local anesthetic and steroid. Numeric rating scale(NRS) pain score, Oswestry disability index (ODI), Roland-Morris Disability Questionnaire (RDQ), claudication distance(CD) was checked before and after the procedure.
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NRS score
Timeframe: 4 weeks after intervention