Does two episodes of acute urinary retention lead to additional ischemia-reperfusion injury in rat bladder?

Aim: To determine whether two episodes of acute urinary retention lead to additional ischemia-reperfusion injury due to decompression of the bladder, or not. Materials and methods: Sham, retention and recurrent retention groups consisting of 5, 8 and 8 Wistar Albino male rats were randomized, respectively. After the bladders of rats were emptied with 3F catheter, penile urethras were clamped with aneurism clamp and waited for 30 min after diuresis was forced. At the end of this period, penile clamps were removed and the bladder was again decompressed with 3F catheter and after 30 min removed for examination. In the recurrent retention group, the same process was repeated after an interval of one week. Malonedialdehyde (MDA) levels, indicator of lipid peroxidation and myeloperoxidase (MPO) levels, indicator of leukocyte activation, were examined biochemically in the tissues of the removed bladders. Results: In the retention and recurrent retention groups, the average increase in bladder MDA and MPO values was higher than the values of sham group (P 0.05), however, no significant difference was determined between retention and recurrent retention groups (P> 0.05). Conclusion: In the bladder tissue, due to acute urinary retention and following decompression process, ischemia-reperfusion injury occurs. Two episodes of acute urinary retention do not lead to additional the ischemia-reperfusion injury that develops in the bladder. © Springer 2006.