• Eiji Takasawa, Yoichi Iizuka, Tokue Mieda, Hirokazu Inoue, Atsushi Kimura, Katsushi Takeshita, Hiroyuki Sonoda, Kenta Takakura, Yasunori Sorimachi, Tsuyoshi Ara, Atsushi Arai, Kosuke Shida, Takashi Nakajima, Satoshi Tsutsumi, Hidekazu Arai, Hiroshi Moridaira, Hiroshi Taneichi, Toru Funayama, Hiroshi Noguchi, Kousei Miura, Ryoichi Kobayashi, Haku Iizuka, Masaaki Chazono, and Hirotaka Chikuda.
• Department of Orthopaedic Surgery, Gunma University Graduate School of Medicine, 3-39-22 Showa, Maebashi, Gunma, 371-8511, Japan. e-takasawa@gunma-u.ac.jp.
• Eur Spine J. 2023 Oct 1; 32 (10): 357535823575-3582.

PurposeThis study aimed to investigate the recent 10-year trends in cervical laminoplasty and 30-day postoperative complications.MethodsThis retrospective multi-institutional cohort study enrolled patients who underwent laminoplasty for cervical spondylotic myelopathy (CSM) or ossification of the posterior longitudinal ligament. The primary outcome was the occurrence of all-cause 30-day complications. Trends were investigated and compared in the early (2008-2012) and late (2013-2017) periods.ResultsAmong 1095 patients (mean age, 66 years; 762 [70%] male), 542 and 553 patients were treated in the early and late periods, respectively. In the late period, patients were older at surgery (65 years vs. 68 years), there were more males (66% vs. 73%), and open-door laminoplasty (50% vs. 69%) was the preferred procedure, while %CSM (77% vs. 78%) and the perioperative JOA scores were similar to the early period. During the study period, the rate of preservation of the posterior muscle-ligament complex attached to the C2/C7-spinous process (C2, 89% vs. 93%; C7, 62% vs. 85%) increased and the number of laminoplasty levels (3.7 vs. 3.1) decreased. While the 30-day complication rate remained stable (3.9% vs. 3.4%), C5 palsy tended to decrease (2.4% vs. 0.9%, P = 0.059); superficial SSI increased significantly (0% vs. 1.3%, P = 0.015), while the decreased incidence of deep SSI did not reach statistical significance (0.6% vs. 0.2%).ConclusionsFrom 2008 to 2017, there were trends toward increasing age at surgery and surgeons' preference for refined open-door laminoplasty. The 30-day complication rate remained stable, but the C5 palsy rate halved.© 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

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