Term
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Definition
-clinical syndrome caused by an inflammatory response to monosodium urate crystals formed, with hyperuricemia
-under-excretion accounts for 90% of cases
-overproduction for 10% |
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Term
Causes of Under-excretion of Uric Acid |
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Definition
-renal insufficiency
-DM, HTN
-drugs and toxins
-diuretics
-ethanol (lactic acidosis) or starvation (ketoacidosis)
-low dose aspirin
-acidosis
-dehydration |
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Term
Causes of Overproduction of Uric Acid |
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Definition
-Ethanol
-enzyme deficiencies (HGPRT)
-synthetase overactivity (PRPP)
-myeloproliferative disorders such as leukemia, lymphoma
-chemotherapy
-hemolytic processes, psoriasis, Paget's
-Sickle cell
-glycogen storage disease |
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Term
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Definition
-principally a disease of men and lesser to post-menopausal women
-directly related to degree of hyperuricemia
-uric acid levels increase with age
-renal disease
-alcohol
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Term
Presentation of Acute Gouty Arthritis |
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Definition
-abrupt onset of severe joint inflammation, often with onset at night
-first metatarsal (MTP) is most commonly affected
-PE: joint is warm, no ROM; skin is erythematous, violaceous
-can be one or more than one joint
-can progress to chronic gout |
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Term
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Definition
-usually associated with tissue deposits of uric acid due to long standing hyperuricemia
-tophi is produced, indicative of foreign body reaction to crystals
-will have inflammatory mediators
-creates associated erosion of cartilage and bone
-can be confused with RA nodules, but examination of fluid can diagnosis |
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Term
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Definition
-athrocentesis to determine presence of crystals and rule out infection
-joint fluid is inflammatory with lots of WBC's (but less than in infectious)
-serum uric acid levels can help but may not be elevated in every case
-24 hour urine test
-X-ray |
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Term
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Definition
-NSAIDS
-Colchicine can be used initially to prevent further release of inflammatory cells
-corticosteroids, glucocorticoid injections
-colchicine prophylaxis |
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Term
Management of Chronic Gout |
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Definition
-if patients have tophi, erosive joint disease, or renal stones, long term therapy is needed
-Colchicine and NSAIDS can be used for prophylaxis
-Allopurinol decreases uric acid levels in blood
-Probenecid increases secretion by acting on the tubules
-**if either last two are used, Colchicine or NSAIDS should be administered as well** |
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