Fig. 4From: Application of a targeted and quantificational foraminoplasty device in percutaneous transforaminal endoscopic discectomy for L5–S1 disc herniation: preliminary clinical outcomesOne case in the ZESSYS group. a, b A 57-year-old female patient diagnosed with lumbar disc herniation at L5–S1 and underwent PTED with the ZESSYS device. c Part of the ventral side of the SAP was cut and removed during the foraminoplasty procedure. d The S1 nerve root (N) was clearly visualized. e, f Postoperative (3 days after surgery) MRI scan showing good decompression and incomplete annulus restorationBack to article page