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Cystinuria Profile, Quantitative, 24 Hour, Urine

Additional Codes

LAB3328

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

Urine


Necessary Information


1. 24-Hour volume (in milliliters) is required.

2. Patient's age is required.

3. Include family history, clinical condition (asymptomatic or acute episode), diet, and drug therapy information.



Specimen Required


-Urine Tubes, 10 mL (T068)

-Diazolidinyl Urea (Germall) 5.0 mL (T822)

Specimen Volume: 5 mL

Collection Instructions:

1. Collect before intravenous pyelogram.

2. Add 5 g of diazolidinyl urea (Germall) as preservative at start of collection. If preservative is not available, refrigerate during collection.

3. Collect urine for 24 hours.

4. Mix well before taking 5-mL aliquot.

Additional Information: See Urine Preservatives-Collection and Transportation for 24-Hour Urine Specimens for multiple collections.


Specimen Minimum Volume

1 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Urine Frozen (preferred) 70 days
  Refrigerated  14 days

Reference Values

Cystine

3-15 years: ≤53 mcmol/24 h

≥16 years: ≤115 mcmol/24 h

 

Lysine

3-15 years: ≤140 mcmol/24 h

≥16 years: ≤290 mcmol/24 h

 

Ornithine

3-15 years: ≤16 mcmol/24 h

≥16 years: ≤70 mcmol/24 h

 

Arginine

3-15 years: ≤25 mcmol/24 h

≥16 years: ≤64 mcmol/24 h

 

Conversion Formulas:

Result in mcmol/24 hours x 0.24 =result in mg/24 h

Result in mg/24 hours x 4.17 =result in mcmol/24 h

Day(s) Performed

Monday through Friday

CPT Code Information

82136

LOINC Code Information

Test ID Test Order Name Order LOINC Value
CYSQN Cystinuria Profile, QN, 24 hour 90785-7

 

Result ID Test Result Name Result LOINC Value
TM38 Collection Duration 13362-9
VL36 Urine Volume 3167-4
3583 Cystine 13966-7
3589 Lysine 25464-9
3590 Ornithine 25491-2
3591 Arginine 25322-9
50447 Reviewed By 18771-6

Report Available

3 to 5 days

Specimen Retention Time

2 weeks