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首页> 外文期刊>Physiological measurement >Effects of muscle injury severity on localized bioimpedance measurements
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Effects of muscle injury severity on localized bioimpedance measurements

机译：肌肉损伤严重程度对局部生物阻抗测量的影响

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摘要

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.
机译：下肢肌肉受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（轻度应变或轻度损伤），II级（局部破裂，中度损伤）和III级（完全破裂，重度损伤）。使用相敏分析仪在50 kHz下进行四极局部生物阻抗分析（BIA），以评估四头肌，绳肌和小腿21处受伤后24 h对肌肉结构完整性和液体积聚的损害，并进行了诊断磁共振成像（MRI）。这项研究的目的是根据MRI定义的严重程度，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[反应（Xc）和相角（PA）]的指标受伤。 R，Xc和PA受伤后24小时也测量了与未受伤的对侧肌肉相比的百分比差异分别为：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的下降幅度更大（p <0.001）。最大的相对变化是III级伤害。但是，表明液体分布的R降低与损伤的严重程度不成比例。 Xc的局部测定表明，肌肉结构的破坏随着肌肉损伤的严重程度而增加。损伤后24小时最显着的变化是Xc的大幅下降，表明软组织结构破裂的模式与损伤的严重程度成正比。

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