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논문 기본 정보

자료유형
학술저널
저자정보
Che-Wei Liu (Department of Orthopedics Cathay General Hospital) Lawrence G. Lenke (Columbia University Medical Center) Lee A. Tan (Department of Neurosurgery University of California San Francisco) Taemin Oh (Department of Neurosurgery University of California San Francisco) Kou-Hua Chao (Department of Orthopedics Tri-Service General Hospital) Shi-Ding Lin (Department of Orthopedics Cathay General Hospital) Ru-Yu Pan (Department of Orthopedics Tri-Service General Hospital)
저널정보
대한척추신경외과학회 Neurospine 대한척추신경외과학회지 제17권 제4호
발행연도
2020.1
수록면
902 - 909 (8page)

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Objective: To examine existing literature and pool the data to determine the relative odds ratio of “adding-on” (AO) based on various reported criteria for lower instrumented vertebra (LIV) selection in Lenke type 1A and 2A curves. Methods: Using electronic databases, studies reporting on AO and LIV selection in Lenke type 1A and 2A curves were identified. Studies were excluded if they failed to meet the following criteria: ≥30 patients, Lenke type 1A or 2A curves, thoracic-only fusions, and inclusion of outcome differences in AO and non-AO groups. Review articles, letters, and case reports were excluded. Results: Six studies were identified reporting on 732 patients with either Lenke type 1A or 2A curves treated with thoracic-only fusions. Five different landmarks were used for LIV selection in these studies including the stable vertebra (SV) -1, end vertebra (EV) +1, neutral vertebra (NV), touched vertebra (TV), and substantially touched vertebra (STV) versus nonsubstantially touched vertebra (nSTV) +1. The pooled odds ratios of AO for choosing LIV at levels above the afore landmarks (i.e., ending the construct “short”) versus at the landmarks were 2.59 (SV-1), 2.43 (EV+1), 3.05 (NV), 3.40 (TV), and 4.52 (STV/nSTV+1), all at 95% confidence interval. Conclusion: Five landmarks shared a similar characteristic in that the incidence of AO was significantly higher if the LIV was proximal to the chosen landmark. In addition, choosing STV/(nSTV+1) as the LIV have the lowest absolute risk of AO and the greatest risk reduction. If additional levels were fused (i.e., LIV distal to the landmark), there was no statistically significant benefit in further reducing the risk of AO. Selection of the optimal LIV is a complex issue and spine surgeons must balance the risk of AO with the need for motion preservation in young patients.

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