RESUMO
From the period of April 1991 to March 1992, 71 patients who underwent radical surgery for rectal cancer were interviewed before and after the operation on their voiding symptoms as subjective parameters and these results were analyzed with objective urodynamic results. Compared with the preoperative voiding symptom score, significant improvement was observed in total voiding symptoms(obstructive plus irritative symptoms) in postoperative sixth month(p 0.05), but residual urine volume was well correlated with overall denervation urodynamic parameters (p < 0.05). In conclusion, postoperative voiding dysfunction was initially deteriorated but was improving over the next six months and better than preoperative status which was explained by removal of irritating tumor focus. The measurement of residual urine volume would be the simple and reasonable method as a substitute for urodynamic study during postoperative voiding dysfunction period.