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  • Title: Bridging long ureteral defects using the Yang-Monti principle.
    Author: Ali-el-Dein B, Ghoneim MA.
    Journal: J Urol; 2003 Mar; 169(3):1074-7. PubMed ID: 12576849.
    Abstract:
    PURPOSE: A new technique for replacing the ureter based on the Yang-Monti principle is introduced to overcome the drawbacks of the classic ileal ureter. MATERIALS AND METHODS: Between March 2001 and June 2002 ureteral replacement by ileum was indicated in 10 patients, including 9 with long or multiple strictures due to bilharzial (6), tuberculosis (3) and a low grade lower ureteral tumor (1). The technique involved isolation of a 5 to 7.5 cm. ileal segment, which was further subdivided into 2 or 3 equal parts. Paramesenteric incision along the longitudinal axis of these segments followed by unfolding resulted in a 12 to 18 cm. ileal strip. Tubularization of this strip led to the formation of an ileal tube with a suitable caliber. The latter was implanted into the bladder by submucosal (nonrefluxing) ileovesicostomy. RESULTS: Mean followup +/- SD was 9.6 +/- 2.4 months (range 6 to 13). Mean serum creatinine remained stable in all patients. Split kidney function (mercaptoacetyltriglycine clearance) was stable in 7 cases and improved in 3. Antegrade urography revealed dynamic unidirectional nonobstructed flow. Reflux was noted in only 1 case. Excretory urography and/or magnetic resonance urography showed excellent configuration of the substitute without evidence of dilatation or obstruction. CONCLUSIONS: The new technique offers certain distinct advantages. A short bowel segment is included with the consequent absence of metabolic complications. It allows construction of an ileal ureter with a suitable cross-sectional diameter without the need for tailoring and makes possible the use of an antireflux technique.
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