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Revista do Colégio Brasileiro de Cirurgiões

Print version ISSN 0100-6991On-line version ISSN 1809-4546


SANTOS JUNIOR, Miguel Arcanjo dos et al. Left colon myoelectric activity in the gastrocolic reflex. Rev. Col. Bras. Cir. [online]. 2000, vol.27, n.6, pp.366-372. ISSN 0100-6991.

Our aim in this study was to settle the patterns of the myoelectric activity on the left colon ( sigmoid) regarding the gastrocolic reflex by analysing the Electric Control Activity (ECA), the Electric Response Activity (ERA), the Migrating Colonic Contractions. We included 15 patients, with no gastrointestinal tract complaints, who underwent histerectomy. The mean age was 40,2 years. Patients were control of themselves and registers were compared with each other before, during and after meal. Bypolar electrodes covered with teflon were implanted on the anterior left colon taenia. After postoperative recovery, data collection was put together. There was taken a DATA Q 200 system for the collection data which reaches frequencies between 0,02 and 10Hz and a software that runs in the Windows environment. Our results showed that there was no significant difference neither in the ECA nor in the short duration ERA ( number/hour) between the groups. The long duration ERA showed a significant decrease regarding its number/hour. There was a statistically significant difference in the Migrating Motor Complex between the registers before and during meal. Regarding the left colon, we concluded that while the electric activity decreased, the motor activity increased after meal.

Keywords : Gastrocolic response; Electric activity; Motility.

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