摘要目的 以生物阻抗技术为基础设计胃动力检测系统.方法 检测系统由采集平台和分析平台2部分构成.前者实现胃电和胃动力阻抗信号的同步采集和数据传输,后者对提取的胃动力阻抗信号和胃电运用小波多分辨分析进行处理,并提取信号的时域、频域和支配频率等参数完成统计分析.结果 实验结果表明功能性消化不良患者(病理组)的胃运动正常节律百分比(PNF)和正常功率百分比(PNP)明显小于健康大学生志愿者(对照组),病理组的节律变异系数(FIC)和功率变异系数(PIC)大于对照组.结论 胃动力检测系统的实现不仅使胃电和胃阻抗信息得到同步获取,同时为胃动力研究和临床检测提供一种电-机复合过程的检测方法.

abstractsObjective A detection system of gastric motility based on bio-impedance technology has been designed.Methods The system consists of collection platform and analysis platform.The former part accomplishes simultaneous acquisition and data transmission of EGG and impedance gastric signals,the latter part uses wavelet transformation to deal with the extracted signals and completes the statistical analysis of some parameters,such as signals in time domain,frequency domain and the dominant frequency.Results The experimental result shows that the percentage of normal frequency (PNF) and the percentage of normal power (PNP) of patients with functional dyspepsia (pathology group,PG) are obviously smaller than those of healthy volunteers (control group,CG).The frequency instability coefficient (FIC) and power instability coefficient(PIC) of PG are grater than those of CG.Conclusion All this shows that the system not only can synchronously acquire signal of EGG and gastric impedance,but also offer a new detection method of the complex electricity-mechanism course of gastric motility and clinical tests.