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SURGICAL OUTCOMES OF THE B-DYN DYNAMIC INTERNAL FIXATION SYSTEM IN THE TREATMENT OF SINGLE LEVEL LUMBAR SPINAL STENOSIS AT VIET DUC UNIVERSITY HOSPITAL
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Abstract
Objective: To investigate the short-term therapeutic efficacy of the B-Dyn dynamic internal fixation system for the treatment of single level lumbar spinal stenosis diseases. Subject and method: 35 single level lumbar spinal stenosis disease patients who underwent posterior lumbar decompression and single-segment B-Dyn dynamic internal fixation at Spinal Surgery Department- Viet Duc University Hospital between Mar 2022 and Mar 2023 were retrospectively analyzed. The preoperative and one month, 3-months, and 12-month postoperative visual analog scale (VAS) pain scores, and Oswestry Disability Index (ODI) scores were observed and recorded to assess the clinical therapeutic effect; the lumbar range of motion (ROM) was measured preoperatively and at the last follow-up to evaluate the preservation of movement function in the dynamically stabilized segment. Result: All patients underwent the operation successfully without complications during hospitalization and were followed with an average of 12 months. The patients' preoperative and post-operative, and last follow-up, VAS of low back pain and legs pain were 6.1 ± 0.9 and 6.7 ± 0.8, 2.3 ± 0.9 and 1.9 ± 0.8, 1.4 ± 0.7 and 1.1 ± 0.7, respectively. The differences had statistical significance when compared between pre-operative with post-operative and last follow-up (p<0.05). The preoperative ODI score (44.6 ± 3.2) was decreased to 13.8 ± 2.1 at post-operative, the difference was statistically significant (p<0.05). The patients' preoperative lumbar ROM and the ROM at last follow-up were 3.5 ± 1.9 and 3.1 ± 1.5, respectively; the difference was not statistically significant (p=0.057). Conclusion: The treatment of single level lumbar spinal stenosis diseases with the B-Dyn dynamic internal fixation system can effectively relieve pain, improve quality of life, and preserve the lumbar ROM of the stabilized segment.
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Keywords
Lumbar spinal stenosis, dynamic internal fixation system, range of motion, B-Dyn device.
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