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    Öğe
    The effect of the selective cyclooxygenase II inhibitor parecoxib on renal morphology and function in acute unilateral ureteral obstruction
    (Acta Medica Mediterranea, 2014) Tutus A.; Deliktas H.; Gedik A.; Gezici A.; Ozekinci S.; Sahin H.
    Objectives: This experimental study aimed to examine the efficacy of parecoxib in the treatment of kidney obstruction. The histopathological and scintigraphic effects of the selective cyclooxygenase II (COX-II) inhibitor parecoxib on renal morphology and function were determined following surgically induced unilateral ureteral obstruction. Materials and methods: The study included 20 male Sprague-Dawley rats that were assigned to 2 groups of 10 each. The rats underwent diethylenetriamine pentaacetic acid (DTPA) renal scintigraphy to calculate basal glomerular filtration rate (GFR) values at the beginning of the study. The left ureters in groups 1 and 2 were ligated distally. The rats in group 2 received parecoxib 5 mg·kg-1·d-1 for 21 d post surgery, whereas those in group 1 received nothing. At the end of postoperative d 21 DTPA renal scintigraphy was repeated in all the rats before undergoing bilateral nephrectomy. All kidneys were evaluated histologically. Results: Histologically, there were no differences between the right kidneys in groups 1 and 2, whereas the occurrence of cortical congestion, glomerular congestion, interstitial inflamation + congestion, and interstitial fibrosis was significantly lower in the left kidneys in group 2 than in those in group 1 (cortical congestion: P = 0.005; glomerular congestion: P = 0.03; interstitial inflamation + congestion: P = 0.01; interstitial fibrosis: P = 0.005). Scintigraphically, left kidney and right kidney GFR values in group 2 were higher than those in group 1; the difference was significant (left kidneys: P = 0.001; right kidneys: P = 0.009). Conclusion: Histopathologically and scintigraphically, kidney function was preserved at the highest level in group 2. Parecoxib treatment was effective in preserving renal function in the obstructed and non obstructed (contralateral) kidneys, and can be administered during the obstruction period until the time radical treatment of obstruction can be performed.
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    Öğe
    Endoscopic treatment of complete posterior urethral obliteration.
    (1998) Sahin H.; Bircan M.K.; Akay A.F.; Göçmen M.; Bilici A.
    The management of posterior urethral obliteration remains a surgical challenge. We report our experience with 5 patients treated endoscopically for posterior urethral obliteration. We performed endoscopic reconstitution of the urethra followed by temporary self-dilation in five patients with complete short posterior urethral obliteration (less than 3 cm). Average follow-up is 31 months (21-53 months). During follow-up 4 of these patients required 1 or 2 internal urethrotomies within the first 4 to 24 months after treatment. But, any urethral stricture has not been established until the average 23.2 months (21 to 27 months). The other fifth patient has no complication at twenty-first month postoperatively. One patient had impotence after the injury. Impotence continued and total incontinence developed after the endoscopic treatment. We believe that endoscopic treatment followed by temporary self-dilation could be a reasonable alternative to open urethroplasty in patients with an impassable short stricture.