Does potassium citrate administration change the type and composition of encrusted material on Double-J stent compared to primary stone?

PURPOSE: To evaluate the effect of potassium citrate administration on the composition of encrusted material on the ureteral stent after Double-J insertion. METHODS: We designed a randomized clinical trial for our study; 65 patients that underwent transurethral lithotripsy and Double-J stent insertion were included in the study after informed consent and divided into two groups. In the first group (33 patients) potassium citrate was prescribed after surgery till stent removal and the second group (32 patients) followed without prescribing this medication. After stent removal, encrusted materials on removed stents were analyzed then the type and composition of encrusted material compared with the primary stone that was removed. RESULTS: Our results revealed that the type and composition of primary stone and encrusted stone were similar in patients that do not receive potassium citrate (p-value of 0.073, 0.251 and 0.944 for calcium oxalate, uric acid, and calcium phosphate respectively). In patients that taking potassium citrate rate of calcium oxalate (p-value < 0.001) and uric acid (p-value < 0.001) material on encrusted stent significantly decreased compared with the non-intervention group. CONCLUSION: Results of this study revealed that taking of potassium citrate after ureteral stent insertion significantly decreases the formation of calcium oxalate and uric acid encrusted material on Double-J stent so it could be recommended for prevention of stent encrustation in patients that primary stone analysis are calcium oxalate and uric acid stone.

Urinoma as the result of a 3mm stone in ipsilateral ureter: A rare case report.

Leakage from the kidney, ureter, bladder, and urethra, which mainly occur due to trauma, forms urinoma. The best tool for diagnosis of urinoma is enhanced-computed tomography with delayed imaging. Apart from injury, ureteral stone can induce urinoma, however, it is rare. Herein, we report a case with urinoma, which probably formed as a result of overdistention of renal pelvis after a large amount of fluid intake (about 3 L) in a short period of time (about an hour) in the presence of a 3mm stone in ipsilateral ureter.

Postrenal Azotemia in a Gastric Cancer Patient Revealed the Coincidence of Ureteral Metastasis and Contralateral Ureteral Stone: A Case Report.

Metastatic ureteral masses are not rare, but isolated ureteral metastasis from the origin of gastric cancer is rare. Ureteral metastasis is usually unilateral and does not lead to postrenal azotemia unless in single kidney patients. Herein, we describe an 80-year-old man with a history of nonmetastatic gastric cancer who presented with postrenal azotemia due to the coincidence of right distal ureteral metastasis and left distal ureteral stone.