Effects of muscle injury severity on localized bioimpedance measurements
Effects of muscle injury severity on localized bioimpedance measurements
复制标题
DOI：
10.1088/0967-3334/36/1/27
复制
发表时间：
2015-01-01
影响因子：
3.2
通讯作者：
Rodas, G.
中科院分区：
文献类型：
--
作者：
Nescolarde, L.;Yanguas, J.;Rodas, G.
下肢肌肉损伤在职业足球运动员中很常见。根据严重程度进行分类，并通过放射学评估诊断为：I级（轻微拉伤或轻微损伤）、II级（部分破裂，中度损伤）和III级（完全破裂，重度损伤）。采用相敏分析仪在50 kHz下进行四极局部生物阻抗分析（BIA），以评估21例股四头肌、腘绳肌和小腿损伤后24 h肌肉结构完整性的损伤和液体积聚，并通过磁共振成像（MRI）进行诊断。本研究的目的是根据MRI定义的损伤的严重程度，确定BIA变量的变化模式，作为液体[电阻（R）]和细胞结构完整性[电抗（Xc）和相位角（PA）]的指标。在损伤后24小时，R、Xc和PA与未损伤的对侧肌肉相比的%差异分别为：I级（n = 11;-10.4、-17.5和-9.0%）、II级（n = 8;-18.4、-32.9和-16.6%）和III级（n = 2;-14.1、-52.9和-43.1%），显示Xc的更显著降低（p < 0.001）。相对变化最大的是三级损伤。然而，表示液体分布的R的减少与损伤的严重程度不成比例。破坏的肌肉结构，表现出本地化的确定Xc，增加肌肉损伤的严重程度。损伤后24小时最显著的变化是Xc的大幅下降，这表明软组织结构的破坏模式，与损伤的严重程度成比例。
Muscle injuries in the lower limb are common among professional football players. Classification is made according to severity and is diagnosed with radiological assessment as: grade I (minor strain or minor injury), grade II (partial rupture, moderate injury) and grade III (complete rupture, severe injury). Tetrapolar localized bioimpedance analysis (BIA) at 50 kHz made with a phase-sensitive analyzer was used to assess damage to the integrity of muscle structures and the fluid accumulation 24 h after injury in 21 injuries in the quadriceps, hamstring and calf, and was diagnosed with magnetic resonance imaging (MRI). The aim of this study was to identify the pattern of change in BIA variables as indicators of fluid [resistance (R)] and cell structure integrity [reactance (Xc) and phase angle (PA)] according to the severity of the MRI-defined injury. The % difference compared to the non-injured contralateral muscle also measured 24-h after injury of R, Xc and PA were respectively: grade I (n = 11; -10.4, -17.5 and -9.0%), grade II (n = 8; -18.4, -32.9 and -16.6%) and grade III (n = 2; -14.1, -52.9 and -43.1%), showing a greater significant decrease in Xc (p < 0.001). The greatest relative changes were in grade III injuries. However, decreases in R, that indicate fluid distribution, were not proportional to the severity of the injury. Disruption of the muscle structure, demonstrated by the localized determination of Xc, increased with the severity of muscle injury. The most significant changes 24 h after injury was the sizeable decrease in Xc that indicates a pattern of disrupted soft tissue structure, proportional to the severity of the injury.