Riezzo G, Pezzolla F, Maselli M A, Giorgio I
Istituto Scientifico Gastroenterologico, Castellana Grotte, Italia.
Digestion. 1994;55(3):185-90. doi: 10.1159/000201146.
To explain the origin of the electrical signals obtained from the abdominal cutaneous surface (electrosplanchnogram, ESG), the ESG was recorded in 6 patients with carcinoma of the right colon without obstruction before and after right hemicolectomy. The analysis of colonic electrical activity was performed by means of spectral analysis that utilized fast Fourier transform method. Since the colonic electrical signal is highly complex and it may contain several frequencies concurrently the spectral frequency components were subdivided in ranges and the dominant frequency and power were calculated for each range before and after surgery. The pattern obtained from power profile, expressed as differences in power percentages before and after surgery, demonstrated that there were significant differences in power data from right hemicolectomized patients compared to cholecystectomized ones (p = 0.00001 and p = 0.001 in 2.5-3.5 and 3.6-7.5 cpm range, respectively). In particular, hemicolectomized patients showed a slight increase of power percentage in the 2.6-3.5 cpm range and a clear reduction in the 3.6-7.5 cpm range. These data suggest that there are several components of colonic origin in the cutaneous ESG signal which, in the right colon, are identifiable in the 3.6-7.5 cpm range.
为了解释从腹部皮肤表面获取的电信号（内脏电图，ESG）的起源，对6例无梗阻的右半结肠癌患者在右半结肠切除术前和术后进行了ESG记录。通过利用快速傅里叶变换方法的频谱分析对结肠电活动进行分析。由于结肠电信号高度复杂且可能同时包含多个频率，因此将频谱频率成分细分为多个范围，并计算手术前后每个范围的主导频率和功率。从功率分布图获得的模式，以手术前后功率百分比的差异表示，表明与胆囊切除患者相比，右半结肠切除患者的功率数据存在显著差异（在2.5 - 3.5和3.6 - 7.5 cpm范围内，p分别为0.00001和0.001）。特别是，半结肠切除患者在2.6 - 3.5 cpm范围内功率百分比略有增加，在3.6 - 7.5 cpm范围内明显降低。这些数据表明，皮肤ESG信号中存在多个结肠起源的成分，在右结肠中，这些成分在3.6 - 7.5 cpm范围内是可识别的。
