Test Overview
Test Methodology

Nitroprusside

Test Usage

Evaluation of cystinuria

Reference Range *

Negative

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Details
Days Set Up
Monday-Friday
Analytic Time

8 hours

Soft Order Code
CYST
MiChart Code
Cystine, Random or 24 HR
Synonyms
    Laboratory
    Chemical Pathology
    Section
    Special Chemistry
    Specimen Requirements
    Collection Instructions

    Collect 24 hour urine specimen with no preservative. Aliquot at least 15 mL into a plastic urine container and refrigerate. Record total 24 hour urine volume and collection dates/times on request form. Random urine is also acceptable.

    Alternate Specimen
    Specimens collected with glacial acetic acid, HCl, Boric Acid, or Toluene preservative are acceptable. If collected in container with acid preservative, indicate on container and requisition: "Collected in Acid".
    Normal Volume
    15 mL aliquot of 24 hour or random urine
    Minimum Volume
    7 mL aliquot of 24 hour or random urine. Cannot perform test with less than 7 mL urine.
    Additional Information

    "Positive" cystine urine samples are stored 6 months frozen for possible quantitative cystine analysis. Call Sendouts at 647-5454 to request quantitative cystine test.

    Billing
    CPT Code
    82127
    Fee Code
    20321
    LOINC
    Z58-8
    NY State Approved
    No