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Query: UMLS:C0451641 (urolithiasis)
 3,973 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Kinetics of growth and dissolution of calcium oxalate monohydrate were examined in the presence of small concentrations of methylene blue. The data presented show moderate retardation in growth and dissolution rates. It was also found that methylene blue decreased the decalcification rate of calcium oxalate renal calculi. The implications of these findings in the treatment of urolithiasis are discussed.
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PMID:Methylene blue as an inhibitor of stone formation. 35 13

The characteristics of 31 adolescent patients aged 11 to 20 years with urolithiasis were examined by means of a ten-year retrospective chart review. The majority of stones were found to be secondary to preexisting conditions, with the most common being bladder dysfunction (neurogenic or exstrophy). Exogenous corticosteroid therapy appeared to play a role in lithogenesis in five patients and was the only apparent contributing factor in an 11 1/2-year-old girl. Childhood inborn errors of metabolism accounted for the stones in four of the teenagers. An additional four adolescents did not have any definable biochemical, genetic, or anatomic abnormalities and, therefore, no obvious etiology.
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PMID:Urolithiasis in adolescents. 36 95

An analysis was carried out of 640 patients treated because of urolithiasis at the Urological Clinic of the Medical Academy in Warsaw in the years 1971--1974. Factors conducive to stone formation were analyzed. In infected urolithiasis, different bacterial floras were found in men and women. The importance of infections acquired in hospital by patients is emphasized. In primarily uninfected urolithiasis there were 35 per cent recurrences, as against 53 per cent recurrences in infected urolithiasis.
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PMID:Recurrences in primarily infected and uninfected urolithiasis. 36 23

Three types of hypercalciuria are described; their existence and frequent association with calcium urolithiasis in humans are accepted. Various dietary factors such as minerals, electrolytes, fluids, vitamin D, carbohydrates, proteins are discussed with regard to their ability to alter the nature and the degree of calcium excretion following their ingestion. It is emphasised that at present we have only limited knowledge on the chain of events linking calorie intake and the response of the kidney.
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PMID:A survey of calcium urolithiasis in normocalcemic hypercalciuria: possible role of nutrients and diet-mediated factors. 38 96

Enteric hyperoxaluria and oxalate urolithiasis in patients with ileal resection seem to be caused by intestinal hyperabsorption of oxalate. The mechanism responsible for hyperabsorption of oxalate is not known. Intestinal transport of oxalic acid was therefore examined by an in vitro technique in rat intestine. Oxalic acid was absorbed by a mechanism of simple passive diffusion. The rate of absorption decreased from the colon to the duodenum (colon greater than ileum greater than jejunum greater than duodenum). Bile acids enhanced oxalic acid absorption in the large and small intestine and increased extracellular space; calcium, however, markedly decreased mucosal-serosal transport of oxalic acid. Cholestyramine known to reduce oxalate excretion in hyperuxaluria associated with ileal resection did not directly affect absorption of oxalic acid, but decreased the enhanced absorption of oxalic acid induced by bile acids. The results suggest that the beneficial therapeutic effect of cholestyramine in hyperuxaluria is rather mediated by its bile acid binding activity than by direct binding of oxalic acid.
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PMID:Intestinal oxalate absorption. I. Absorption in vitro. 41 86

Endometriosis of the left kidney complicated by urolithiasis is described. This represents the tenth case in the world literature of kidney endometriosis. The most common symptom is low back pain. Macroscopic hematuria was only present in half the cases. The preoperative radiological findings have been interpreted as tumor in four cases, contracted, pyelonephritic kidney in two cases and congenital abnormalities in two cases.
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PMID:[Endometriosis of the kidney (author's transl)]. 41 36

FActors predisposing to renal stone formation have been studied in 309 patients. Dehydration before diagnosis of urolithiasis was due in 12% of the cases to frequent diarrhea and in 36% to bad working conditions. Daily fluid intake was less than 1 liter in 25% of the patients before stone formation and was persistently low in 11% after stone discovery. 41% of the patients drank irregularly over the day, before stone formation, and 11% continued to do so after its detection. Immobilization was present in the patient's history in over 20% of the cases. Normocalcemic hypercalciuria was found in 26% of the patients. 24% of the patients drank water with a calcium concentration of 100--500 mg/l before the lithiasis was diagnosed; 21% continued to do so after stone discovery or paradoxically even drank harder water than before stone detection.
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PMID:High fluid-low calcium intake: not all renal stone formers adhere to this simple treatment. 42 10

An epidemiological and clinical study of a sample of 105 children with urolithiasis treated in the period 1965-1974 in a defined population of children revealed a decrease in the rate of incidence of this disease in a municipal infant population with high-ranking care for their health. Serious forms of urolithiasis are on the decrease. There is a higher rate of incidence in schoolboys and schoolgirls, the latter being more often involved than boys. Despite the general lower rate of occurrence, urolithiasis still has such forms as will endanger the life of the organ and the life of the patient. Injury to health of the child by this disease consists mainly in loss of one kidney, ambilateral staghorn stones that proved irremovable in their entirety and pyelonephritis.
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PMID:Epidemiological and clinical significances of urolithiasis in childhood. 42 17

A case of feline urolithiasis is described. It was demonstrated that serial determinations of renal function were mandatory in order to provide a favorable prognosis. Because hyperkalemia was present, the fluid of choice for the initial treatment was saline. The various considerations in the prevention, treatment and monitoring of cats with feline urolithiasis syndrome are discussed.
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PMID:Feline urological syndrome. 42 6

The clinical peculiarities, and the etiological and pathogenetic factors of urolithiasis in 296 patients suffering from spontaneous stone elimination were studied. It was established that 209 patients eliminated stones consisting of uric acid, sodium salts and ammonium salts. Moderate hypocalcemia and hyperphosphatemia and also hyperuricemia and hyperuricuria were present. There were 39 'eliminators' of calcium stones. Their blood calcium content was higher, hypercalciuria, inorganic phosphorus and normal uric acid, were noted. Compound stones were present in 48 observations. When carrying out additional biochemical tests in 57 patients with calcium and compound stones, primary hyperparathyroidism was diagnosed in 34 observations; and parathyroidectomy was successfully performed.
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PMID:On the pathogenesis of stone formation in stone-eliminating patients. 42 6


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