Clinical Study

A Modified Translaminar Osseous Channel-Assisted Percutaneous Endoscopic Lumbar Discectomy for Highly Migrated and Sequestrated Disc Herniations of the Upper Lumbar: Clinical Outcomes, Surgical Indications, and Technical Considerations

Table 2

Comparison of VAS and ODI in eleven patients before operation and at each postoperative time point ().

PreoperativeImmediate3 months6 months12 months values

VAS of back
VAS of leg
ODI

d with preoperative, .
d with immediately after surgery, .