"Histopathological Evaluation of the Effects of Intraurethral Platelet Rich Plasma in Urethral Trauma Experimentally Induced in Rat Model".

To determine the efficacy of platelet rich plasma applied early instilization after urethral trauma for preventing inflammation and spongiofibrosis.Twenty-three rats were randomized and divided into 3 groups, with 10 rats in two groups. Only sham group had 3 rats. The urethras of all rats were traumatized with a pediatric urethrotome knife at 6 and 12 o' clock. For 15 days, group I was given PRP once a day without urethral injury (sham group), group II (n=10) was not given any medical treatment only urethral injury group(UI-PRP), Group III (n=10) was given PRP once a day intraurethrally as instillation using a 22 ga catheter sheath with urethral injury(UI+PRP) . On day 15, the penises of the rats were degloved to perform penectomy.A significant difference was detected in all parameters when the Sham, UI-PRP, UI+PRP groups were compared (respectively, p:0.001, p<0.001, p:0.008, p:0.007) and a significant difference was observed among mucosal inflammation, fibrosis and edema parameters when UI-PRP and UI+PRP groups were compared. (Respectively; p<0.001, p<0.001 and p: 0.006).In this study, it was shown that intraurethral PRP applied after urethral trauma significantly decreased mucosal inflammation, spongiofibrosis and edema. Depending on the results we acquired in this study, we think that PRP may be a promising option in urethral stricture treatment.