[Efficacy and safety of vertebrae pedicle subtraction osteotomy by posterior trans apical for correction of severe and rigid idiopathic scoIiosis].

Objective: To evaluate the efficacy and safety of pedicle subtraction osteotomy for correction of severe rigid idiopathic scoliosis. Methods: From January 2003 to December 2014, eighteen patients with severe rigid idiopathic scoliosis were treated by posterior wedge osteotomy in department of spinal surgery, the First Affiliated Hospital of Xinjiang Medical University. There were 5 males and 13 females, and the average age at was (16.9±9.1)years, and the average follow-up was 47.6 months. The coronal and sagittal Cobb's angles, sagittal trunk shifts, apical vertebral translation, height change and fusion segments were measured on standing AP and lateral radiographs before, after surgery and the final follow-up. Results: The Cobb's angle in the coronal plane was corrected from (94.3±13.3)°to (31.6±14.8)°, representing 64.8% correction rate. The Cobb's angle in the sagittal plane was corrected from (62.5±17.8)°to (27.1±11.7)°, representing 82.6% correction rate. Coronal trunk shift was obviously improved from -29.8 mm to -3.5 mm. the average fusion segments was 13.7±1.8 ranging from 11 to 17 segments. Perioperative complications consisted of pleura injury in 4 cases, cerebrospinal fluid leakage in 2 cases transient neurological damage in 2 cases and delayed infection in 1 case. Conclusion: Pedicle Subtraction Osteotomy correction by the single posterior approach is a reliable and safe surgical technique for correction of severe rigid idiopathic scoliosis.