Advancing lumbar disc herniation treatment: a prospective study on the efficacy and safety of percutaneous endoscopic lumbar discectomy under local anesthesia, across symptom severity.

Postoperative analgesic requirements demonstrated a severity-dependent pattern, with 30% of mild symptom patients requiring additional pain medication beyond the standard protocol, compared to 50% and 70% in moderate and severe groups, respectively, though these differences did not reach statistical significance ( p = 0.089).

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