Current radiological techniques used to evaluate unilateral partial ureteral obstruction: an experimental rabbit study

Autor: İlkay Koray Bayrak, Meltem Ceyhan Bilgici, Mehmet Yazıcı, Ender Aritürk, Özgür Kuzdan, Hüseyin Koçan, Oktay Yapıcı, Suleyman Celebi, Mehmet Kefeli, Halil Suat Ayyildiz
Přispěvatelé: Ondokuz Mayıs Üniversitesi
Rok vydání: 2015
Předmět:
Zdroj: International Urology and Nephrology. 47:1045-1050
ISSN: 1573-2584
0301-1623
DOI: 10.1007/s11255-015-0998-9
Popis: Kocan, Huseyin/0000-0002-0670-8080 WOS: 000356902100002 PubMed: 25943266 The aim of this study was to evaluate functional and prognostic benefits of Doppler ultrasonography (DU), diuretic renal scintigraphy (DRS), and magnetic resonance urography (MRU) during diagnosis and follow-up of ureteropelvic junction obstruction (UPJO) and to examine apoptosis rates caused by UPJO in an experimental rabbit model. Twenty-four rabbits were divided randomly into two groups. The left kidneys of 15 rabbits from the first group underwent Ulm-Miller surgery to create UPJO, whereas the left kidneys of nine rabbits from the second group underwent sham surgery. A pressure flow study (Whitaker's test) was done during postoperative week 6. Based on the Whitaker test, the DU, DRS, and MRU findings were compared. The number of apoptotic renal cells was counted after death. The Whitaker test run during postoperative week 6 revealed obstructions in 15 rabbits from group 1; the nine rabbits of the sham group had no obstructions. Sensitivity and specificity of DRS were 93.3 and 88.8 %, respectively, and those of MRU were 93.3 and 88.8 %, respectively. The postoperative mean RI values were significantly higher than the preoperative values, associated with sensitivity of 86.6 % and specificity of 77.5 % for detecting UPJO. DRS, MRU, and RI could not predict UPJO in one (8 %), one (8 %), and two (16 %) kidneys, respectively. Likelihood ratio (LR) was 8.4 for MRU and scintigraphy, while for RI, LR was 3.9. Pathology specimens revealed that all kidneys with UPJO underwent apoptosis, and the number of apoptotic cells was significantly higher on the UPJO-created side than on the contralateral and in the sham group (p < 0.05). No test predicted all apoptosis related to UPJO. The RI, DRS, and DMRU results correlated with the pressure flow results for detecting UPJO. No single radiological technique predicted all initial UPJO-created kidneys that concluded with apoptosis. Further studies are required to seek with better methods for diagnosing an obstruction or to define a combination of radiological techniques aiding in the management decision.
Databáze: OpenAIRE
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