[Clinical and experimental study on reconstruction after pancreatectomy--Part II. Myoelectric activity of small intestine after pancreatoduodenectomy].

The aim of the study was to investigate the intestinal motility on I-type of reconstruction (e.g. Imanaga procedure) and II-type of reconstruction (e.g. Whipple procedure) following pancreatoduodenectomy in conscious dogs by chronically implanted electrodes along the reestablishing small intestine. During fasting, the interdigestive myoelectric complexes (IMCs) were initiated at a variety of electrode sites in either type of reconstruction. Seventy-six percent of the IMCs which were recorded in I-type dogs were propagated in sequence aborad. On the other hand, in II-type dogs, only 49% of the IMCs was propagated aborad. Furthermore the IMC cycles were more irregular in II-type dogs than in I-type dogs. After a meal, a characteristic fed pattern was induced in I-type dogs, whereas in II-type dogs the response of the small intestine to a meal was suppressed. This study shows that the intestinal myoelectric activity after pancreatoduodenectomy is more markedly disturbed in II-type of reconstruction than in I-type of reconstruction. Such disturbance of the intestinal activity may be a cause of postoperative malnutrition.