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Cystine Urine

₹8,000.00

15 minutes
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The Cystine Urine Test measures the levels of cystine, an amino acid, in the urine. Cystine is normally present in the body, but when it accumulates due to a genetic disorder, it can form crystals that may lead to cystinuria, a condition that causes kidney stones and urinary tract blockages. The test helps detect excessive cystine levels in the urine, which is indicative of cystinuria, a rare hereditary condition.
The test can be done using a 24-hour urine collection or a random urine sample. The result is typically reported as the amount of cystine per volume of urine.

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    Description

    Why It’s Done

    This test is performed to:
    • Diagnose cystinuria, especially in individuals with:
    o Recurrent kidney stones or urinary tract blockages.
    o Painful urination or signs of hematuria (blood in the urine).
    • Monitor patients with known cystinuria for excessive cystine levels.
    • Investigate unexplained kidney stones or symptoms of renal dysfunction in children or adults.
    • Provide important genetic information for family planning as cystinuria is inherited in an autosomal recessive manner.

    Preparation

    • A 24-hour urine collection may be required, during which all urine produced over a 24-hour period is collected in a special container.
    o If using a random urine sample, ensure the sample is collected midstream.
    • Hydrate well prior to collection, as dehydration may influence the concentration of cystine.
    • Avoid intense physical activity before the test as it may affect the results.
    • Inform the doctor of any medications or supplements being taken, as some drugs can affect cystine excretion.

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