Niu R, Zhao J
Research Department, Tongji Hospital Affiliated in Tongji Medical University, Wuhan.
Zhonghua Jie He He Hu Xi Za Zhi. 1995 Oct;18(5):297-300, 318-9.
We designed and performed the chest and abdomen impedance respirograph (IRG), which included the one dimentional IRG and the two dimentional IRG, by applying the principle of bioelectrical impedance. Using IRG, we measured the non-synchronized chest and abdomen respiratory motions occurring in the diaphragmatic fatigue. The results showed that all 203 normal control subjects showed synchronized pattern of chest and abdomen respiratory motions. In 189 COPD patients 117 (61.9%) showed non-synchronized respiratory motions which could be further divided into three types: type I showed complete contradirectional movements of respiration, M > 24% and alpha angle > 120 degrees; type II showed staggered peak of the chest and abdomen motion curves, 13% < M < 24%, 50 degrees < alpha angle < 120 degrees; type III showed double peaks in the one dimentional IRG and 8-shaped double circles in the two dimentional IRG, M < 13%, alpha angle > 40 degrees. When compared with Pdi and diaphragm myoelectricity frequency spectrum the rates of accordance were 81.8% and 90%, respectivity, suggesting that IRG could be reliably used to diagnose diaphragmatic fatigue. This technique is simple, easy, cheap and non-invasive. It is, therefore, worth to be widely recommanded for clinical investigation.
我们运用生物电阻抗原理设计并实施了胸腹部阻抗呼吸描记术（IRG），其中包括一维IRG和二维IRG。通过IRG，我们测量了膈肌疲劳时出现的胸腹部呼吸运动不同步情况。结果显示，所有203名正常对照受试者的胸腹部呼吸运动均呈同步模式。在189例慢性阻塞性肺疾病（COPD）患者中，117例（61.9%）出现呼吸运动不同步，可进一步分为三种类型：I型表现为呼吸完全反向运动，M>24%且α角>120度；II型表现为胸腹部运动曲线峰值错开，13%<M<24%，50度<α角<120度；III型在一维IRG中表现为双峰，在二维IRG中表现为8字形双圈，M<13%，α角>40度。与跨膈压（Pdi）和膈肌肌电频谱相比，符合率分别为81.8%和90%，表明IRG可可靠地用于诊断膈肌疲劳。该技术简单、易行、价廉且无创。因此，值得在临床研究中广泛推荐。
