Relationship Between Intestinal Motility Indexes From Internal and Surface Recordings of Electroenterogram.

摘要

Electroenterogram is the myoelectric signal of the smooth muscle of the small intestine, This biosignal traduces bowel motility. However, an invasive method is necessary for placing electodes on small bowel serosa, The aim of this paper is to relate surface recording spectral parameters of electroenterogram to intestinal motility indexes from internal electoenterogram recordings, Bipolar electrodes where placed at different points along the small intestine serosa of two Beagle dogs in order to acquire internal myoelectric signals, Likewise two monopolar contact electrodes were situated on abdominal surface for external recording. Internal and surface signals were amplified and acquired simultaneously in fast state, Internal signals were parameterised in order to obtain intestinal motility indexes, In the same way surface recording was quantified to calculate several spectral parameters. Correlation coefficient functions are calculated and considered as results, Every spectral surface parameter reaches a high correlation with intestinal motility index of each internal recording point. Energy above 2 Hz from the external signal provides highest correlation (round 0.7). Small bowel contractile activity progression referred from abdominal surface recording point is detected, Best correlation is achieved when adjusting time lags. The energy over 2 Hz of surface recorded signal can be used to represent intestinal motility.