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Table 3 Prior surgical intervention undertaken at index level

From: Percutaneous transforaminal endoscopic surgery (PTES) for symptomatic lumbar disc herniation: a surgical technique, outcome, and complications in 209 consecutive cases

Prior procedure at index level No. of patients Percent
Laminectomy and discectomy 14 6.7
Endoscopic discectomy 2 1.0
Decompression and fusion 2 1.0
Radiofrequency ablation 2 1.0
Ozone injections 1 0.5