Okayama Rosai Hospital 2 articles published in JoVE Neuroscience Transtubular Endoscopic Posterolateral Decompression for L5-S1 Lumbar Lateral Disc Herniation Masato Tanaka1, Shinya Arataki1, Rahul Mehta1, Tsung-Ting Tsai2, Yoshihiro Fujiwara1, Koji Uotani1, Taro Yamauchi1 1Department of Orthopedic Surgery, Okayama Rosai Hospital, 2Department of Orthopedic Surgery, Chang Gung University Presented here is a novel technique of C-arm free transtubular posterolateral decompression for lumbar foraminal stenosis and lateral disc herniation under O-arm navigation. Medicine C-arm-Free Simultaneous OLIF51 and Percutaneous Pedicle Screw Fixation in a Single Lateral Position Masato Tanaka1, Sameer Ruparel1, Yoshiaki Oda1, Yoshihiro Fujiwara1, Sneha Shama1, Koji Uotani1, Shinya Arataki1, Taro Yamauchi1, Naveen Sake1 1Department of Orthopaedic Surgery, Okayama Rosai Hospital C-arm-free oblique lumbar interbody fusion at the L5-S1 level (OLIF51) and simultaneous pedicle screw fixation are performed in a lateral position under navigation guidance. This technique does not expose the surgeon or operating staff to radiation hazards.