人体肱二头肌静态等长收缩振动模态研究*

本文研究肱二头肌静态收缩振动规律。利用多物理场有限元仿真软件COMSOL建立肱二头肌仿真模型,计算肱二头肌在静态时的本征频率及其模态,同时检测静态负荷弯举的肱二头肌肌声信号。模拟结果显示肱二头肌静态等长收缩振动模态主要有5种,且随振动频率的升高,振动模态趋于复杂。实验测量反映了肱二头肌静态收缩肌声振动能量集中在超低频区。仿真模拟结果与实验统计数据进行对比分析,发现肱二头肌在超低频区域振动的模态在y轴方向受力伸缩的同时,出现x轴和z轴方向的振动。振动主峰频率平均在12 Hz。     

Differential scanning calorimetric and histological examinations of the long head of the biceps in cadavers

Shoulder pain is a common presentation of the dysfunction of the glenohumeral joint. The long head of the biceps tendon has been proposed as a source of pain in rotator cuff pathologies. The rotator cuff is a dynamic stabilizer of the glenohumeral joint, and its tear can create different shoulder dysfunctions. The long head of the biceps has a special intraarticular localisation, so the arthricular destruction affects its tendon too. In the process of the rotator cuff degeneration and tear the structure of the biceps tendon pathological transforms. With foregoing studies authors have demonstrated the feasibility of DSC in the investigation of the musculoskeletal system. The aim of this study was to establish the curves and the histological properties of the tendon of the long head of the biceps in different magnitudes of the rotator cuff tear on cadavers. The DSC results clearly proved that definitive differences are present between the structural state of the tendons in different magnitudes of the rotator cuff tears, which have also been demonstrated by the histological examination.     

高频超声分析肩袖病变与肱二头肌长头肌腱病变临床特点及相关性

本文通过高频超声检查分析了肩袖病变与肱二头肌长头肌腱(long head of the biceps brachii tendon,LHBT)病变的临床特点及相关性。文中对32例肩关节镜手术患者的术前肩关节超声检查结果与肩关节镜手术结果进行了一致性检验。按照不同肩袖病变类型对患者进行分组,对组间LHBT病变类型的差异进行了比对分析,并对LHBT病变类型及病变总发生率与肩袖撕裂部位、范围大小均进行了相关性分析。结果证实术前肩关节超声检查结果与关节镜手术结果的诊断一致性中等偏高。LHBT病变类型在不同肩袖撕裂类型中总的差异不显著,而LHBT半脱位在不同肩袖撕裂部位的组间差异较为显著。LHBT病变类型与肩袖撕裂范围大小之间无明显相关性。随着肩袖撕裂范围的增大,LHBT病变发生率升高,二者呈正相关。由本文结果可知,LHBT病变与肩袖病变存在一定相关性,肩袖损伤的早期诊断与修复可防止LHBT病变进一步恶化。