%0 Journal Article %A Deepak Kumar Jha %A Jaskaran Singh Gosal %A Jigish Ruparelia %A Nitin Kumar %A Tarunesh Sharma %A Pradeep Kumar Bhatia %A Pushpinder Khera %T Simple working sheath for lumbar and lumbosacral spine: technical note %D 2021 %R 10.1136/bmjinnov-2020-000558 %J BMJ Innovations %P bmjinnov-2020-000558 %U https://innovations.bmj.com/content/bmjinnov/early/2021/01/31/bmjinnov-2020-000558.full.pdf