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Cystine, Quantitative, random urine

Item Value
Approval req'd? No
Available Stat? No
Test code CUQT
Test group Cystine
Performed by Quest
Sendout? Yes
Method LC/MS/MS
Container type Urine cup
Amount to Collect See preferred volume
Sample type Random urine
Preferred volume 2 mL urine
Min. Volume 1.8 mL urine
Processing notes Freeze sample at -20C. Order Quest # 9605N.
Units mmol/mol creatinine
Normal range Cystine
Pediatric (<18 Years) 2.8-10.9 mmol/mol creat
Adult 2.9-14.1 mmol/mol creat

Creatinine Random Urine

≤6 Months 0.18-2.86 mmol/L
7-11 Months 0.18-3.19 mmol/L
1-2 Years 0.18-11.33 mmol/L
3-8 Years 0.18-13.19 mmol/L
9-12 Years 0.18-16.19 mmol/L
Adult 2.38-26.55 mmol/L
Turn around times Test run as needed, at least 3x weekly. Turnaround 3-5 days
Additional information Clinical Significance: Cystinuria is an autosomal recessive disease in which dibasic amino acids, including cystine, are excreted in excess. Also part of Amino Acid Analysis.

Pediatric reference ranges are from Soldin SJ et al., eds., Pediatric Reference Ranges, 2nd ed., AACC Press,1997, pp. 20-29.
CPT coding 82131-90
LOINC code 22687-8
Last Updated 6/21/2016 08:17:11
Entry Number 290
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