Objective: To explore the possible mechanisms of pain relief by ozone therapy in patients with different types of lumbar intervertebral disc protrusion.
Methods: The medical records of a total of 250 patients with protrusion of lumbar intervertebral disc (159 males, 91 females, aged 14–85 years) admitted in the South Hospital from January 2009 to June 2014 were retrospectively reviewed. Patients with protrusion of lumbar intervertebral disc were divided into four groups according to T2-weighted magnetic resonance imaging and digital subtraction angiography findings during ozone injection: type I, fibrous ring rupture without nucleus pulposus protrusion; type II, fibrous ring rupture with nucleus pulposus protrusion; type III, non-ruptured fibrous ring without nucleus pulposus protrusion; and type IV, non-ruptured fibrous ring with nucleus pulposus protrusion. Visual analogue scale (VAS) pain scores were used to evaluate treatment efficacy among patients with different types of lumbar intervertebral disc protrusion before surgery, and at 1 week, 1 month, 6 months, and 12 months after surgery.
Results: Atrophy of the nucleus pulposus was observed in 63% of type II and IV patients within 1 year after surgery. The VAS scores at 1 week, 1 month, 6 months, and 12 months after surgery decreased by an average of 4.47, 4.41, 4.77, and 4.85 for type I to IV disease, respectively. More specifically, scores of type I patients were decreased by 4.57, 4.72, 4.98, and 4.93, respectively, during the follow-up period. Scores of type II patients were decreased by 4.78, 461, 5.08, and 5; type III cases by 3.72, 377, 3.97, and 4.84, respectively; and type IV cases by 4.24, 4.10, 4.45, and 4.41, respectively. In addition, the postoperative VAS score of 94.4%, 91.6%, 89.6% and 90.8% of patients were decreased by > 25%, i.e., the pain was alleviated, with type I patients demonstrating a pain relief rate of 96.3% during the entire follow-up period, along with 93.5% and 89.8%, and 89.8%, respectively for type II patients, 76.9%, 84.6%, 76.9%, and 87.2%, respectively for type III patients, and 77.6%, 79.6%, 79.6%, and 79.6%, respectively for type IV patients.
Conclusion: Ozone therapy is an effective pain-relief therapy for lumbar intervertebral disc protrusion. The degree of pain relief was closely related to rupture of the fibrous ring and protrusion of the nucleus pulposus. Pain relief efficacy was improved in patients with fibrous ring rupture and nucleus pulposus, while the pain relief effects in patients without fibrous ring rupture or nucleus pulposus protrusion were poor.
Endoscopic removal of nucleus pulposus of intervertebral disc on lumbar intervertebral disc protrusion and the influence on inflammatory factors and immune function