INITIAL EVALUATION OF INTRA-OPERATIVE NEUROMONITORING SIGNAL CHANGES DURING SEVERE KYPHOSCOLIOSIS SURGERY WITHOUT VERTEBRAL COLUMN RESECTION AT HOSPITAL FOR TRAUMATOLOGY AND ORTHOPAEDICS

The Canh Dau1,, Quang Dinh Nam Vo1
1 Hospital for Traumatology and Orthopedics

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Abstract

Background: Spinal cord injury is a rare complication that causes serious sequelae in spinal deformity surgery. Objective: To describe the relation of intra-operative neuromonitoring (IONM) signal changes during posterior spinal fusion (PSF) without vertebral column resection (VCR) to other factors in severe kyphoscoliosis surgery at Hospital for Traumatology and Orthopedic. Materials and methods: Retrospective review of severe pediatric spinal deformity patients treated with PSF without VCR or three-column osteotomy from 2013 to 2022. Exclusion criteria were prior instrumentation, lack of IONM, and incomplete radiographic data. Coronal DAR(C-DAR), sagittal DAR (S-DAR), total DAR (T-DAR), Cobb’ Angle, kyphosis, age, and etiology were collected and compared between patients with IONM signal loss and those without. Results: Thirty-two patients met the inclusion criteria. Five of thirty-two (15.6%) patients had abnormal IONM signal. In our study, IONM signals loss was not associated with increased kyphosis (p= 0.27), or Cobb’s angle (p= 0.16). S-DAR (p= 0.84), T-DAR (p= 0.27), C-DAR (p=0.19) and etiology (p= 0,16). The age (p=0.009), curve types (thoracic) (p=0.046) were significantly associated with IONM signal loss. Conclusion: Severe rigid spinal deformity carries a high risk of IOM signals loss. Our study found that abnormal IOM signals were closely related to preoperative age, curve types. However, a greater DAR was not associated with a higher risk of neurological injury. The study needs more cases to reduce bias statistics.

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References

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