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논문 기본 정보

자료유형
학술저널
저자정보
Shingo Kuroya (St. Marianna University School of Medicine) Tsutomu Akazawa (St. Marianna University School of Medicine) Toshiaki Kotani (Seirei Sakura Citizen Hospital) Tsuyoshi Sakuma (Seirei Sakura Citizen Hospital) Shohei Minami (Seirei Sakura Citizen Hospital) Yoshiaki Torii (St. Marianna University School of Medicine) Tasuku Umehara (St. Marianna University School of Medicine) Masahiro Iinuma (St. Marianna University School of Medicine) Kenichi Murakami (St. Marianna University School of Medicine) Sumihisa Orita (Chiba University) Kazuhide Inage (Chiba University) Yawara Eguchi (Chiba University) Kazuki Fujimoto (Chiba University) Yasuhiro Shiga (Chiba University) Junichi Nakamura (Chiba University) Gen Inoue (Kitasato University School of Medicine) Masayuki Miyagi (Kitasato University School of Medicine) Wataru Saito1 (Kitasato University School of Medicine) Seiji Ohtori (Chiba University) Hisateru Niki (St. Marianna University School of Medicine)
저널정보
대한척추외과학회 Asian Spine Journal Asian Spine Journal Vol.13 No.5
발행연도
2019.1
수록면
793 - 800 (8page)

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Study Design: A retrospective cohort study. Purpose: This study aims to investigate postoperative shoulder imbalance (PSI) ≥5 years postoperatively in patients who underwent posterior spinal fusion using hooks at the upper instrumented vertebra (UIV) for Lenke type 1 adolescent idiopathic scoliosis (AIS). Overview of Literature: Studies have reported PSI due to excessive correction of the main thoracic curve. Methods: We examined 56 patients with AIS who underwent a posterior spinal fusion with hooks at the UIV from 2004 to 2010. Of these, we enrolled 14 patients who underwent surgery, at least, 5 years ago. X-rays and Scoliosis Research Society-22 (SRS-22) questionnaire were administered. To evaluate the shoulder balance, T1 vertebral tilt angle (T1 tilt), clavicle angle, and radiographic shoulder height (RSH) were measured. PSI was considered as the absolute value of the postoperative RSH being ≥20 mm. Based on radiographs obtained immediately postoperatively, we divided patients into two groups as follows: the balanced group (absolute value of RSH <20 mm) and imbalanced group (absolute value of RSH ≥20 mm). Results: The frequency of PSI was 28.6% immediately postoperatively, 0% 2 years postoperatively, and 7.1% at the last follow-up. In the balanced group, PSI did not occur even at 2 years postoperatively or at the last follow-up. In the imbalanced group, PSI was improved in all patients 2 years postoperatively and all patients, except one patient, at the last follow-up. No significant differences were noted in the frequency of distal adding-on at 2 years postoperatively or the last follow-up between the balanced group and the imbalanced group. We observed moderate negative correlations between the absolute value of T1 tilt and the SRS-22 pain and satisfaction at the last follow-up. Conclusions: Hooks at the UIV could adjust the shoulder balance to avoid long-term PSI in patients with AIS.

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