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Article Abstract

Objective: To analyze the effect of C7-T1 extensional posterior transpedicular vertebral osteotomy (PSO) on mobility and quality of life in patients with ankylosing spondylitis (AS) and lumbar kyphosis.

Methods: This study was conducted from February 2019 to February 2021 and a total of 38 patients with AS combined with kyphosis from Tianjin Union Medical Center, Tianjin, China, were selected for the study. After performing all preoperative examinations, all patients were treated with C7-T1 extensional posterior PSO osteotomy. The patients' operation and follow-up, pain degree as a Visual analogue scale (VAS) score and sagittal balance index changes before and after surgery, spinal function measured as; Bath Ankylosing Spondylitis Functional Index (BASFI) score and quality of life by Scoliosis Research Society-22 (SRS-22) score, were observed before and after surgery. Pearson correlation coefficient was used to analyze the correlation between patients' quality of life and BASFI score.

Results: After surgery, the pain of the patients' back was significantly relieved, the patients' appearance and trunk balance function were significantly improved, and the symptoms related to nerve function were not significantly aggravated. No complications such as infection, internal fixation failure or spinal decompensation occurred in all patients. VAS score, kyphosis Cobb Angle and Sagittal Vertical Axis (SVA) of all patients showed P < .05 before and 1 year after surgery. BASFI score 1 year after surgery decreased significantly than that before surgery (P < .05). 1 year after surgery, body function, pain symptoms, self-image and psychological state of the patients were significantly improved, and the SRS-22 total score of the patients 1 year after surgery increased significantly than before surgery (P < 0.05). BASFI score was negatively correlated with SRS-22 score by Pearson correlation coefficient analysis (P < .05).

Conclusion: C7-T1 extensional posterior PSO osteotomy has a good effect in the treatment of AS patients with lumbar kyphosis. The sagittal balance was well-restored with improvement in patients' quality of life after surgery, which makes C7-T1 osteotomy worthy of clinical application to treat patients suffering from AS combined with lumbar kyphosis.

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