[The usefulness of biofeedback in children with encopresis. A preliminary report].

Children with encopresis (costiveness) have a social problem, and (BFB) offers them a valid therapeutic alternative. The present prospective study compares the advantages of this technique with conventional treatment in 21 patients, with average ages of 10.13 and 8.54 years in each group. The patients were studied by clinical, manometric and electromyographic parameters. Those treated with BFB showed clinical improvement, with manometric significant enhancement (p < 0.001) of the percentage of internal anal sphincter (IAE) relaxation, relaxation interval of the IAE and rectal sensation threshold (RST), on the other hand, patients treated by conventional therapy only improved the RST (p < 0.01). Biofeedback seems useful in the treatment of the child with encopresis.