title: Two-channel gastric electrical stimulation accelerates delayed gastric emptying induced by vasopressin.
abstract: The aim of this study was to investigate the effects of two-channel gastric electrical stimulation (GES) on delayed gastric emptying, gastric dysrhythmias, and motion sickness-like symptoms induced by vasopressin. Seven dogs implanted with four pairs of gastric electrodes and a duodenal cannula were studied in four randomized sessions (saline, vasopressin, single-channel GES, and two-channel GES). The experiment in each session was conducted sequentially as follows: 30-min baseline, ingestion of a liquid meal, 30-min iv infusion of vasopressin or saline, and two 30-min postprandial recordings. In the GES sessions, GES was applied via the first pair of electrodes for single-channel GES or the first and third pairs of electrodes for two-channel GES. Gastric emptying was collected every 15 min via the cannula for a period of 90 min. Results were as follows. (1) Vasopressin induced gastric dysrhythmias, motion sickness-like symptoms, and delayed gastric emptying (P < 0.01, ANOVA). (2) GES normalized gastric dysrhythmias (P < 0.01) but showed no effects on vasopressin-induced emetic response. (3) Two-channel GES improved delayed gastric emptying induced by vasopressin. In comparison with the vasopressin session, two-channel GES, but not single-channel GES, significantly increased gastric emptying at 30 min (43.9+/-12.6 vs. 27.5+/-7.7%; P < 0.03), 60 min (75.3+/-15.1 vs. 54.0+/-17.8%; P < 0.05), and 90 min (91.6+/-9.8 vs. 80.3+/-9.0%; P < 0.05). GES with long pulses is able to normalize gastric dysrhythmias. Two-channel GES improves delayed gastric emptying induced by vasopressin.
authors.affiliation: Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China.
authors.forename: Gengqing
authors.initials: G
authors.lastname: Song
authors.forename: Xiaohua
authors.initials: X
authors.lastname: Hou
authors.forename: Bin
authors.initials: B
authors.lastname: Yang
authors.forename: Jinsong
authors.initials: J
authors.lastname: Liu
authors.forename: Wei
authors.initials: W
authors.lastname: Qian
authors.forename: Jiande D Z
authors.initials: JD
authors.lastname: Chen
mesh_terms: D000818:Animals; D004285:Dogs; D004599:Electric Stimulation Therapy / Q000379:methods; D005746:Gastric Emptying / Q000187:drug effects*; D008297:Male; D009041:Motion Sickness / Q000139:chemically induced / Q000628:therapy; D010507:Periodicity; D013270:Stomach / Q000187:drug effects* / Q000503:physiopathology; D013272:Stomach Diseases / Q000139:chemically induced* / Q000503:physiopathology / Q000628:therapy*; D013997:Time Factors; D014667:Vasopressins / Q000009:adverse effects / Q000494:pharmacology*
chemical_list: D014667:Vasopressins