Cystine, Quantitative, Urine

CPT: 82131
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Test Details

Use

Measures levels of cystine in urine to detect presence of cystinuria and nephrolithiasis.

Methodology

Liquid chromatography/tandem mass spectrometry (LC/MS-MS)

Reference Interval

10.00−100.00 mg/24 hours

Specimen Requirements

Specimen

Urine (24-hour)

Volume

5 mL aliquot

Minimum Volume

2.5 mL aliquot

Container

Plastic urine container without preservative.

Storage Instructions

Maintain specimen at room temperature. Stable frozen for one year, room temperature for seven days, or refrigerated for three months.

Clinical Information

Special Instructions

The test request form must state date and time collection started and finished. The test request form must state whether patient is taking penicillamine. Measure and record the total 24-hour urine volume on the test request form.

LOINC® Map

Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
700195 Cystine, Quant. 24 hr Urine 700381 Cystine, Quantitative, Urine mg/L 32169-5
700195 Cystine, Quant. 24 hr Urine 700382 Cystine, Quant, Ur mg/24 hr 2179-0
Reflex Table for Cystine, Quant, Ur
Order Code Order Name Result Code Result Name UofM Result LOINC
Reflex 1 700471 Disclaimer: 700471 Disclaimer: N/A

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The LOINC® codes are copyright © 1994-2017, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. Permission is granted in perpetuity, without payment of license fees or royalties, to use, copy, or distribute the LOINC® codes for any commercial or non-commercial purpose, subject to the terms under the license agreement found at https://loinc.org/license/. Additional information regarding LOINC® codes can be found at LOINC.org, including the LOINC Manual, which can be downloaded at LOINC.org/downloads/files/LOINCManual.pdf