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Query: UMLS:C0403608 (ureter)
 9,655 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

There is no simple analytical test. Radionuclide diuretic renography (RDR), being a dynamic imaging study reflecting the function of the kidney and the urodynamics of the urinary tracts, has the potential to predict the outcome of surgery in obstructive uropathy. In 12 sheep, we occluded one ureter for a maximum of seven weeks and followed up for a maxim of five weeks after release of occlusion. Repeated Tc-99m DTPA diuretic renography studies were performed and the results were correlated with the duration of complete ureteric occlusion. The renal uptake percentage and the extraction slope of the time activity curve (TAC) showed progressive and steady decrease over the period of the occlusion. By the fifth week there was very low uptake (less than 18%) and the TAC was almost flat, suggestive of severe nephropathy. The parenchymal transit time index (PTTI) showed immediate rise after occlusion but with no progressive increase in its value. By the fifth week it dropped down to normal. After release, the recovery of function showed good correlation with the renal uptake percentage and extraction slope of TAC before release of occlusion. Therefore both these parameters, rather than PTTI, can be used to predict the outcome of surgery before the release of complete obstruction of the ureter.
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PMID:The predictive value of Tc-99m DTPA renography in obstructive uropathy using animal model. 228 20

Clinical data of 31 patients (34 renal units) with severe congenital hydronephrosis who had received preliminary nephrostomy were reviewed to survey functional recovery of the kidneys and the significance of preliminary nephrostomy. The results were as follows: 1. In most cases, the renal function based on Ccr and 99mTc-DMSA renal scintigraphy after nephrostomy could not improve beyond preoperative one. 2. A close linear correction was found between the thickness of renal parenchyma before preliminary nephrostomy and the renal function after the nephrostomy. 3. Preliminary nephrostomy is indicated for severe hydronephrosis in neonates and infants, obstruction of the lower ureter, and serious general condition, which need accurate split renal function, and for patients without accurate diagnosis.
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PMID:[Clinical research on congenital hydronephrosis--significance and indication of the preliminary nephrostomy]. 262 26

A new method has been developed for effective normobaric transorganic oxygen preservation of the kidneys. According to this method, oxygen is insufflated simultaneously through an artery, a vein and a ureter. A portable autonomously-operated device has been developed and used successfully for its clinical application. In experimental conditions, transorganic oxygen preservation ensures viability of the preserved kidney for up to 48 hours, with immediate post-transplantation recovery of renal function, and for 72 hours, with delayed functional recovery. The success of transorganic oxygen preservation was controlled by cellular metabolism assessment. Changes in adenylic acid components, lactic acid and lipid peroxidation products were measured in renal tissue. In clinical conditions, the outcome of transplantation could be predicted with high probability on the basis of intraoperative transplant hemodynamic studies. Two groups of patients were compared: 43 patients to whom a cadaver kidney, preserved by transorganic oxygenation for up to 52 hours, was transplanted, and recipients of contralateral kidneys, obtained from the same donors and preserved in Eurocollins solution for not more than 26 hours without perfusion. Preservation by transorganic oxygenation was shown to be preferable when clinical results were analysed.
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PMID:[Substantiation and use of a new method of transorganic oxygen preservation of the kidneys]. 265 16

The authors report a case of anuria. The existence of an isolated pseudotumor of the pelvic ureter revealed a case of periarteritis nodosa. A segmental resection and a psoic bladder provided satisfactory functional recovery.
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PMID:[Pseudotumor of the ureter manifesting periarteritis nodosa]. 615 85

There is debate concerning the time course and degree of recovery possible after relief of complete unilateral ureteric obstruction. This study in dogs investigates these features. One ureter was occluded for varying periods, and then reimplanted into the bladder. Recovery was monitored by Tc-Sn-labelled diethylene triamine penta acetic acid (D.T.P.A.) scans and renograms together with creatinine clearance studies. The morphological changes were also studied. There was found to be a progressive loss of functional recovery with increasing periods of obstruction, though this was dramatically improved by contralateral nephrectomy once recovery had stabilized. Increased radial scarring developed in the kidney following increasing periods of obstruction.
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PMID:Renal impairment and its reversibility following variable periods of complete ureteric obstruction. 692 68

The traumatic fracture of the ureter is a very uncommon entity, which accounts for 1-5% of all urological traumatism. In most cases it is secondary to penetrating lesions, endoscopic or open surgery iatrogeny, its occurrence as secondary to closed traumatism being very rare. The paper presents four patients with partial ureteral fractures caused by closed traumatism. Management was in all cases conservative with endourological methods, using backward ureteral intubation, and no case required the use of other types of complementary surgical approaches; functional recovery of urinary tract was complete in all four patients.
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PMID:[Endourologic treatment of ureteral ruptures in closed abdominal trauma]. 901 48

A large cystic mass that occupied more than half of the abdomen was identified by ultrasound in a 10-month-old boy. Intravenous pyelography failed to visualize the right kidney, so we created a loop ureterocutaneostomy followed by temporary nephrostomy to improve renal function. Exploratory surgery revealed complete atresia of the distal right ureter. A ureteral stricture developed after ureteroneocystostomy and undiversion of the loop, so a second reconstruction procedure was required (pelvi-ureteroplasty and reimplantation of the right ureter with a psoas hitch) to free the patient from dependence on catheters. Despite the occurrence of giant hydronephrosis secondary to complete ureteral obstruction at the age of 10 months, the function of the right kidney could be preserved. Accordingly, aggressive attempts to promote functional recovery may be justified even when patients have advanced hydronephrosis.
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PMID:Distal ureteral atresia: recovery of renal function after relief of obstruction at ten months old. 1598 82