ELECTROMYOGRAPHIC EVALUATION OF THE GASTROINTESTINAL-TRACT IN DOGS WITH SHORT-BOWEL SYNDROME

Seven dogs were subjected to resection of 80% of the total length of t he small bowel. Seven pairs of electrodes were implanted in the seromu scular layer of the antrum and remaining small bowel. Electromyographi c recordings were obtained during fasting and after milk ingestion. Sl ow waves were identified in all sites studied and their frequencies we re 4.7 +/- 0.4/min in the antrum; 17.5 +/- 0.58/min in DI; 17.5 +/- 0. 61/min in D2; 17.43 +/- 0.65/min in J1; 17.40 +/-0.62/min in J2; 10.28 +/- 0.77/min in 11; and 9.81 +/- 0.53/min in 12. The phase III of the migrating motor complex was identified in only one recording. Ingesti on of milk caused the appearance of the fed pattern in all recording s ites. except the antrum. It is concluded that extensive resection of t he small bowel causes reduction of the slow wave frequency in the gut distal to the resection and disappearance of phase III of the migratin g motor complex.