Inaba H, Miyaji K, Kaneko Y, Ohtsuka T, Ezure M, Tambara K, Takamoto S, Omata S
Department of Cardiothoracic Surgery, Faculty of Medicine, University of Tokyo, Japan.
Artif Organs. 2000 Oct;24(10):808-15. doi: 10.1046/j.1525-1594.2000.06551.x.
In clinical settings, no method has been established to examine the fatigue of a latissimus dorsi muscle (LDM) preconditioned for cardiomyoplasty. We examined the feasibility of measuring muscle stiffness (tactile stiffness) to evaluate muscle fatigue in situ using our tactile sensor. We stimulated canine LDM with burst pacing and monitored both stiffness and tension to determine their relationship. In both dissected LDM and LDM in situ, the decrements of these parameters during burst pacing were compared between preconditioned and unconditioned LDM. In measurement in situ, the sensor probe was placed on the LDM through a small incision. Strong statistical correlation was shown between stiffness and tension (r = 0.935). In decrements of stiffness in situ, there were statistically significant differences between preconditioned and unconditioned LDM. Our tactile sensor system can provide an efficient method for evaluating fatigue of muscles in situ without measuring muscle tension.
在临床环境中，尚未建立用于检查为心脏成形术进行预处理的背阔肌（LDM）疲劳程度的方法。我们研究了使用触觉传感器原位测量肌肉僵硬度（触觉硬度）以评估肌肉疲劳的可行性。我们通过短阵起搏刺激犬的LDM，并监测僵硬度和张力以确定它们之间的关系。在解剖的LDM和原位LDM中，比较了预处理LDM和未预处理LDM在短阵起搏期间这些参数的下降情况。在原位测量中，通过小切口将传感器探头放置在LDM上。僵硬度和张力之间显示出很强的统计学相关性（r = 0.935）。在原位僵硬度的下降方面，预处理LDM和未预处理LDM之间存在统计学上的显著差异。我们的触觉传感器系统可以提供一种在不测量肌肉张力的情况下原位评估肌肉疲劳的有效方法。
