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Electrodermal screening of biologically active points for upper gastrointestinal bleeding.

The purpose of this case-control study was to investigate the relationship between the electrical resistance of the skin at biologically active points (BAPs) on the main meridians and upper gastrointestinal bleeding (UGIB). Electrical resistance to direct current at 20 BAPs on the fingers and toes of 100 patients with (38 men, 12 women; mean age [range], 58.20 ± 19.62 [18-83] years) and without (27 men, 23 women; 49.54 ± 12.12 [22-74] years) UGIB was measured through electrodermal screening (EDS), based on the theory of electroacupuncture according to Voll (EAV). Data were compared through analysis of variance (ANOVA), receiver operating characteristic (ROC) curve analysis, and logistic regression. The initial readings were lower in the UGIB group, indicating blood and energy deficiency due to UGIB. Significant differences in indicator drop values were observed at nine BAPs (p < 0.05) on the bilateral small intestine, bilateral stomach, bilateral circulation, bilateral fibroid degeneration, and right lymph meridians. The area under the ROC curve values of the BAPs on the bilateral small intestine and stomach meridians were larger than 0.5, suggesting the diagnostic accuracy of EDS for UGIB on the basis of the indicator drop of these BAPs. Logistic regression revealed that when the indicator drop of the BAP on the left stomach meridian increased by one score, the risk of UGIB increased by about 1.545-3.523 times. In conclusion, the change in the electrical resistance of the skin measured by EDS at the BAPs on the bilateral small intestine and stomach meridians provides specific information on UGIB.