Evaluating ESWL related alterations in renal pelvis and proximal ureter by analayting of tissue hydroxyproline levels

Yıl 2015, Cilt: 32 Sayı: 1, 31 - 34, 24.04.2015

Mine Şenyücel Özlem Boybeyi , Mustafa Aslan , Tutku Soyer , Mahi Balcı , Arkut Demet Ücler Kısa , Murad Başar Murat Çakmak

Öz

The aim of the study is to evaluate extracorporeal shock wave lithotripsy (ESWL) related alterations in renal pelvis and proximal ureter by using histopathological methods and analayting hydroxy-proline levels. Twelve New-Zealand rabbits were allocated into two groups (n=6). Right sites of control group (CG, n=6) were harvested without any intervention. In ESWL group (EG), right kidneys of subjects were exposed to 3000 shock waves (14 kV) by using electro-hydraulic type ESWL device three times. Rabbits in EG were sacrificed on day 7. Tissues were examined histopathologically for presence of edema, inflammation, congestion, hemorrhage, fibrosis, vascularization and biochemically for hydroxyproline concentrations. Histopathologically, tissue edema was increased in renal pelvises and inflammation was increased in ureters in the EG compared to that in the CG (p<0.5). There was no difference in other parameters between the groups (p>0.05). Tissue collagen density did not show any significant difference (p>0.05). There was no difference in the tissue hydroxyl-proline levels of ureter samples (p>0.05). Tissue hydroxyproline levels were significantly higher in EG than CG in renal pelvis (p<0.05). In conclusion, although no major histopathological alteration due to ESWL was detected in renal pelvis and proximal ureter, increased hydroxyproline levels in the renal pelvis can be suggested as a finding of tissue injury in collecting system.

Anahtar Kelimeler

Collecting system, ESWL, Hydroxyproline, Renal pelvis, Ureter

Kaynakça

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• The increased level of OH-proline levels in renal pelvis in
• EG may be an indicator of shock-wave induced tissue injury
• in our study. The reason of the inability to confirm this injury
• with histopathologic examination may be the close time
• between shock wave exposure and tissue sampling. Some
• studies showed that the initial renal damage resolves over
• days to months (Williams et al., 1998; Carvalho et al., 2009).
• Since we took the samples at 7th day we would be late to show
• any histopathologic alteration in tissues. The increased level
• of OH-proline in renal pelvis shows that damage had been
• occurred after ESWL and the healing process started to take
• place by increased collagen turnover. However, the effect of
• this result to the long-term consequences of ESWL should be
• examined in future studies.
• In conclusion, although no major histopathologic
• alteration due to ESWL was detected in renal pelvis and
• proximal ureter, increased OH-proline levels in renal pelvis
• can be suggested as a finding of tissue injury in the collecting system.