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A new nomenclature system for the surgical treatment of cervical spine deformity, developing, and validation of SOF system

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Abstract

Purpose

To develop and assess the reliability of new nomenclature system that systematically organizes osteotomy techniques and briefly describes the surgical approach, the surgical sequence, and the fixation technique for cervical spine deformity (CSD).

Methods

We developed a new classification system (SOF system) for CSD surgery that describes the sequence of surgical approach (S), the grade of osteotomy (O), and the information of fixation (F) using alphanumeric codes.

Twenty CSD osteotomies (8 anterior osteotomies, 12 posterior osteotomies) were included in this study to evaluate the inter- and intra-observer agreement based on operation records.

Six observers performed independent evaluations of the operation records in random order. Each observer described 20 CSD surgeries using the SOF system twice (> 30 days between assessments) based on operation records to validate SOF system.

Results

Overall agreement (among all six observers at the initial assessment) on the anterior and posterior osteotomy was ICC = 0.96 and ICC = 0.91, respectively. Overall agreement (repeat observations after at least 30 days) on the anterior and posterior osteotomy was ICC = 0.96 and ICC = 0.91, respectively.

This data showed that both inter- and intra-observer agreement revealed ‘excellent’.

Conclusion

This study introduces the SOF system of the CSD surgery to understand the surgical sequence, the type of osteotomy and the fixation techniques. The investigation of the inter- and intra-observer agreement revealed ‘excellent agreement’ for both anterior and posterior osteotomies.

Thus, SOF system can provide a consistent description of the various CSD surgeries and its use will provide a common frame for CSD surgery and help communicate between surgeons.

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Acknowledgment

We acknowledge that the material is not published previously.

Funding

The authors have no personal, financial, or institutional interest in any of the drugs, materials, or devices described in this article.

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Authors and Affiliations

  1. Department of Neurosurgery, Eunpyeong St. Mary’s Hospital, The Catholic University of Korea, Seoul, Korea

    Jae Taek Hong

  2. Department of Neurosurgery, Technical University of Munich, Munich, Germany

    Heiko Koller

  3. Department of Orthopedic Surgery, Sapporo Orthopedic Hospital, Sapporo, Japan

    Kuniyoshi Abumi

  4. Department of Orthopedic Surgery, Changzheng Hospital, Second Military Medical University, Shanghai, China

    Wen Yuan

  5. Department of Neurosurgery, University of Caxias Do Sul, Caxias Do Sul, RS, Brazil

    Asdrubal Falavigna

  6. Department of Neurosurgery, St. Vincent’s Hospital, The Catholic University of Korea, Suwon, Korea

    Ho Jin Lee & Il Sup Kim

  7. Department of Neurosurgery, Chungbuk National University Hospital, Cheongju, Korea

    Jong Beom Lee

  8. Department of Orthopedic Surgery, Bordeaux University Hospital, Bordeaux, France

    Jean-Charles Le Huec

  9. Department of Neurosurgery, Incheon St. Mary’s Hospital, The Catholic University of Korea, Incheon, Korea

    Jong-Hyeok Park

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  1. Jae Taek Hong
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Correspondence to Jae Taek Hong.

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Hong, J.T., Koller, H., Abumi, K. et al. A new nomenclature system for the surgical treatment of cervical spine deformity, developing, and validation of SOF system. Eur Spine J 30, 1670–1680 (2021). https://doi.org/10.1007/s00586-021-06751-1

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  • DOI: https://doi.org/10.1007/s00586-021-06751-1

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