【摘要】 目的比较膈肌肌电均方根(RMSdi)与积分肌电值(i EMGdi)两种膈肌电信号处理方法对气道阻力增加状态下呼吸中枢评价的准确性。方法选择2015年1-6月广州12名健康志愿者,接受不同程度的吸气阻力,并测量膈肌肌电以及跨膈压,膈肌肌电分别采用均方根和积分值处理,两种算法得出的结果分别与吸气跨膈压作相关性分析,比较其相关系数。结果在低、中、高水平吸气阻力时,膈肌肌电均方根与吸气跨膈压之间的相关系数分别为0.198,0.141及0.569(P=0.054),均无相关性(均P>0.05);而3个阻力下的积分肌电值与吸气跨膈压之间的相关系数分别为0.896,0.885及0.876,均存在明显相关性(均P<0.01)。结论吸气阻力存在时,积分肌电值比膈肌肌电均方根更能准确地评价呼吸中枢的吸气努力程度。更多还原

【Abstract】 Objective To compare the accuracy of root mean square(RMSdi) and integrated diaphragmatic EMG(i EMGdi) in the evaluation of respiratory central drive. Methods Two methods of diaphragmatic electromyography(EMGdi) management were compared.The subjects were asked to receive different levels of inspiratory resistive load, and EMGdi and transdiaphragmatic pressure(Pdi) were detected simultaneously.Compare the correlation coefficient of Pdi with RMSdi and i EMGdi separately. Results Correlation coefficient of RMSdi with Pdi in status of low,middle and high inspiratory resisive load was 0.198(P =0.537), 0.141(P =0.662) and 0.569(P =0.054). The correlation coefficient of i EMGdi in status of the above three levels resistance was 0.896( P <0.01), 0.885(P <0.01) and 0.876(P <0.01). Conclusion i EMGdi is more accurate than RMSdi as the index of respiratory central drive in higher airway resistance.更多还原