研究者詳細 - 本郷　道生

Musculoskeletal modeling of the thoracolumbar spine and trunk muscle are considered clinically useful for quantifying spinal disease processes. However, current models of thoracic spine are not evaluated for dynamical load and posture, or muscle path are constructed Via-Point (straight line muscle) type. In this study, we developed novel trunk musculoskeletal models of the predicted thoracolumbar load which are constructed muscle path in more detail, and validated developed models in dynamic loading and various postures. Developed spine models segmented 17 vertebrae, a sacrum, 10 pairs of ribs, a sternum and defined 17 intervertebral. Muscle path of the trunk muscle models constructed 2 types which are Via-Point type and Wrapping type (curved line muscle along ellipsoid). We estimated intradiscal pressure with constructed models and compared it with measured values. As a result, intradiscal pressure estimated by the model using Wrapping method had an extremely strong correlation with intradiscal pressure measurements made in the thoracic spine. Our results demonstrated significance to faithfully reproduce muscle path in developed musculoskeletal models.

DOI CiNii Research

動的座位バランス計測装置による体幹バランスの定量化

斉藤公男, 島田洋一, 宮腰尚久, 松永俊樹, 巌見武裕, 本郷道生, 粕川雄司, 齊藤英知, 益谷法光, 高橋靖博, 千田聡明, 畠山和利, 渡邉基起, 石川順基, 髙橋裕介, 鈴木真理, 村田脩

リハビリテーション医学 ( 公益社団法人日本リハビリテーション医学会 ) 54 ( 1 ) 31 - 35 2017年

安全にバランス機能を測定するため，動的座位によるバランス計測装置を開発した．本装置は、座面反力（重心動揺）を検出する計測装置と，モータの回転により座面を側方傾斜させ一定の周期で座面を振動させる外乱刺激装置で構成される．3軸力学センサを用い，座面の圧力と圧力中心点を算出することが可能である．座位で計測を行うことで安全であり，下肢の影響を受けないため体幹バランス能力の評価にも使用できると考えている．現在までに行った基礎実験やフィールドワークでの活動，および本装置を用いた介入試験の結果と有用性，今後の活動について概説する．

DOI CiNii Research

Risk factors of cervical surgery related complications in patients older than 80 years

Tamai K.

Spine Surgery and Related Research ( Spine Surgery and Related Research ) 1 ( 4 ) 179 - 184 2017年

Introduction: With an aging population, the proportion of patients aged ≥80 years requiring cervical surgery is increasing. Surgeons are concerned with the high incidence of complications in this population, because "age" itself has been reported as a strong risk factor for complications. However, it is still unknown which factors represent higher risk among these elderly patients. Therefore, this study was conducted to identify the risk factors related to surgical complications specific to elderly patients by analyzing the registry data of patients aged ≥80 years who underwent cervical surgery.Methods: We retrospectively studied multicenter collected registry data using multivariate analysis. Sixty-six patients aged ≥80 years who underwent cervical surgery and were followed up for more than one year were included in this study. Preoperative patient demographic data, including comorbidities and postoperative complications, were collected from multicenter registry data. Complications were considered as major if they required invasive intervention, caused prolonged morbidity, or resulted in prolongation of hospital stay. Logistic regression analysis was performed to analyze the risk factors for complications. A p-value of <0.05 was considered as statistically significant.Results: The total number of patients with complications was 21 (31.8%), with seven major (10.6%) and 14 minor (21.2%) complications. Multivariate logistic regression analysis, after adjusting for age, revealed two significant risk factors: preoperative cerebrovascular disorders (OR, 6.337; p=0.043) for overall complications and cancer history (OR, 8.168; p=0.021) for major complications. Age, presence of diabetes mellitus, and diagnosis were not significant predictive factors for complications in this study.Conclusions: Preoperative cerebrovascular disorders and cancer history were risk factors for complications after cervical surgery in patients over 80 years old. Surgeons should pay attention to these specific risk factors before performing cervical surgery in elderly patients.

DOI CiNii Research

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