Performed research showed that NLS of lumbar spine in early, intermediate and late postoperative periods had revealed changes common for all types of surgeries: scarring changes along surgical canal, recurrence or residual hernias of lumbar spine and epidural scarring. Hypertrophy of posterior longitudinal and yellow ligaments, osteoarthritis of intervertebral joints and intervertebral foramen stenosis appeared in late postoperative period.

Some operations (laminectomy, hemilaminectomy) are characterized by vertebral arch defect. Surgical intervention with posterior approach and multiple laminectomy often causes complication such as intradural cysts. Aside from that, interlaminectomy, interlaminar hernia excision and hemilaminectomy are characterized by complications such as spondilodyscitis, paravertebral abscesses and fistulous tracts. NLS-monitoring with metatron hunter of patients after herniated disc surgeries is an effective control and timely correction method of postoperative complications.