体表小肠电检测方法的探讨

A study on measurement of surface electrical activity of the small intestine

目的探讨体表检测小肠电的方法和肠易激综合征（ＩＢＳ）患者体表小肠电的主频有无变化。方法应用自适应滤波方法通过自行设计的生物电检测分析系统检测正常对照组２４例及ＩＢＳ组２６例受检者的小肠体表电活动。结果体表检测小肠电活动波形清晰；经功率谱计算对照组和ＩＢＳ组小肠体表电的主频分别为１０．８８±０．７０周次／分（ｃｐｍ）和１１．０３±０．８４ｃｐｍ，范围均为９－１２ｃｐｍ，两组比较ｐ＝０．１０６。结论本实验方法可在体表清晰地记录小肠电活动，ＩＢＳ患者空腹状态下体表小肠电主频可能与正常人一致。

Objective To study a method of measurement of surface electrical activity of the small intestine and to investigate the surface electrical predominant frequency of small intestine in the irritable bowel syndrome(IBS). Method The surface electrical activities of the small intestine from the normal group (n = 24) and the IBS group(n=26) were studied by a device which was designed by ourselves. With this device, the respiratory artifacts in the recording waves of small intestine electricity were filtered by the adaptive filter process and the predominant frequencies of the small intestine electricity were estimated by the power spectral analysis. Results The recording waves of surface electricity of the small intestine in both groups were clearly displayed. The predominant frequency of the surface electrical activity of small intestine was 10.88 ± 0. 70 cycles per minute(cpm) in the normal group and 11.03 ±0.84cpm in the IBS group, both groups showed no significant difference (P= 0. 106) and showed a same frequency range at 9- 12cpm. Conclusion The method of measurement can be used clearly to record the surface electrical activity of small intestine. The predominant frequency of electrical activity of the small intestine in the IBS may have no significant change under fasting Condition. [