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Effect of cyclooxygenase-2 inhibition on renal function after renal ablation. Table 3 Hr Urine stone chemistries used for kidney stone evaluation. Solubility of cystine is also affected by pH, increasing as pH rises.
Medical Journal of Lampung University
Journal of the American Society of Nephrology: About The Authors Susi Darmayanti. Modern bariatric surgery also leads to an increase in urine oxalate excretion 58and stone formation may be a complication of this procedure.
Transactions of the American Clinical and Climatological Association ; CREM-dependent transcription in male germ cells controlled by a kinesin. Microorganisms and calcium oxalate stone disease. Plaque deposits are found nefrolitiaiss non-stone formers also, but their abundance is much less. Correction of hypokalemia and increased fluid intake, with control of diarrhea if possible, are therapeutic.
The majority of stones are composed of calcium oxalate, often mixed with calcium phosphate, in both adults and children. The American journal of physiology ; Therapy to prevent stones rests on lowering supersaturation, using both diet and medication.
Management of cystine nephrolithiasis with alpha-mercaptopropionylglycine. Contributor Information Elaine M.
The acute presentation is usually unmistakable, and evaluation with non-contrast CT is advisable for diagnosis.
Struvite stones are seen in jurnxl with urinary tract infections, particularly when complicated by chronic bladder instrumentation, neurogenic bladders or urinary diversion, or in the presence of foreign material such as staples in the urinary tract.
The low gonadotropin independent constitutive production of testicular testosteron is sufficient to mainten spermatogenesis. Supersaturation for stone salts is often expressed as the ratio of the concentration in urine to the known solubility; a level greater than one indicates that urine is supersaturated with a given substance.
Retention of crystals within the kidney is necessary for stone formation. History of prior episodes b.
The effects of cyclooxygenase and nitric oxide synthase inhibition on oxidative stress in isolated rat heart. Stones smaller than 5 mm will generally pass, but larger stones often require urologic procedures for removal; any stone passed or removed should be analyzed. Overall, most stone formers studied so far have crystal deposits in their medullary collecting ducts, with the exception of those with idiopathic CaOx stones, who have not been found to have intra-tubular deposits, but instead abundant deposits of apatite in the papillary interstitium.
Disorders affecting urine pH regulation are nefrolltiasis found in patients with these types of stones. Stones composed predominantly of CaP as apatite or brushite are less common, and are seen more frequently in women.
Human platelets generate phospholipid-esterified prostaglandins via cyclooxygenase-1 that are inhibited by low dose aspirin supplementation. Struvite stones often present in this fashion, as may cystine stones.
Support Center Support Center. Evaluation and treatment of pediatric idiopathic urolithiasis-revisited. International registry for primary hyperoxaluria.
CYSTINE STONES Cystine stones are found in patients with inherited defects of dibasic amino acid transport in the kidney and intestine, leading to increased urinary excretion of lysine, ornithine, cystine and arginine because of defective reabsorption in the nephron Table 6. Clinical use of cystine supersaturation measurements. If urine uric acid excretion is elevated, dietary protein restriction is advised. Anat Rec Hoboken ; Diagnosis in infancy can be difficult, as excretion is elevated in this age group.
The mechanism appears to be, at least in part, an increase in calcium absorption in the proximal tubule, induced by volume contraction.
However, urine in both normal subjects and stone formers is almost always supersaturated with respect to CaOx, although more markedly in stone formers, so that for CaOx, at least, supersaturation is necessary but not sufficient for stone formation. Author information Copyright and License information Disclaimer.
Stones are more common in men than in women, and stone types differ somewhat between the sexes Table 1 ; in children, reported frequency of stone types differs modestly from those in adults, but the sexes are affected about equally 2. This is seen in patients with distal renal tubular acidosis, whether genetic or acquired, but most patients with CaP stones do not have metabolic acidosis and the cause of their persistently alkaline urine pH is unclear.
The role of oxalate degrading bacteria in stool is a subject of current research; lack of such bacteria in the gut flora may permit increased oxalate absorption and eventual renal excretion The effect of nimesulide on oxidative damage inflicted by ischemia-reperfusion on the rat renal tissue.
Stone formation is increased in these patients, both because of the increased oxalate excretion and because of the low urine volume and decreased citrate excretion that occurs in patients with diarrheal states. Patients with systemic disease, such as hyperparathyroidism, bowel disease, renal tubular acidosis, were excluded. Oxidative medicine and cellular longevity ; May Cause Either Calcium Oxalate or Calcium Phosphate Stones Hypercalciuria with normocalcemia Idiopathic hypercalciuria Granulomatous diseases sarcoid Hypercalciuria with hypercalcemia Primary hyperparathyroidism Granulomatous diseases sarcoid Vitamin D excess Malignancy rare Hyperthyroidism Hypocitraturia Secondary to hypokalemia Secondary to metabolic acidosis Idiopathic Causes primarily Calcium oxalate stones Hyperoxaluria Primary hyperoxaluria — Type 1, Type 2 Enteric hyperoxaluria Small bowel resection Bariatric surgery Fat malabsorption from any cause Dietary hyperoxaluria Low calcium diet Excess vitamin C Hyperuricosuria High purine diet Myeloproliferative disorder Persistent low urine volume Diarrheal states Causes primarily Calcium phosphate stones Hypercalciuria with normocalcemia and metabolic acidosis Distal renal tubular acidosis.
Initial management of stones less than 5 mm in patients without anatomic abnormalities of the urinary tract is watchful waiting, to allow time for stone passage. Many rare monogenic diseases are associated with hypercalciuria 5 ; 30but the majority of cases in stone formers are due to either idiopathic hypercalciuria or primary hyperparathyroidism.