Fig. 2

A Sub-annular combo (working channel-endoscope). A’ Endoscopic view of annulus. B Combo with midline crossing grasper. B′ Endoscopic view, Astrix: red; annulus, green; opposite side below right traversing root, yellow; space created by removed nucleus, blue; decompressed cord. C Combo position while doing the endoscopic foraminoplasty. C′ Endoscopic view, Astrix: blue; decompressed traversing root, yellow; space created dorsal to traversing root removing the LF, red; burred facet, green; ventral decompression, white; annulus and black; redundant non compressive capsule and LF* in superior foramen. *LF ligamentum flavum