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Test ID SSATR Supersaturation Profile, Random, Urine

Useful For

Diagnosis and management of patients with renal lithiasis:

-Predicting the likely composition of the stone, in patients who have a radiopaque stone, for whom stone analysis is not available. This may help in designing a treatment program

-Identifying specific risk factors for stones formation using a random urine collection

-Monitoring the effectiveness of therapy by confirming that the crystallization potential has indeed decreased

-Evaluation of kidney excretion of acid and urine pH

Profile Information

Test ID Reporting Name Available Separately Always Performed
RRSUP Supersaturation, Random, U No Yes
NAUR Sodium, Random, U Yes, (order RNAUR) Yes
KURR Potassium, Random, U Yes, (order RKUR) Yes
CACR2 Calcium, Random, U Yes, (order CACR3) Yes
MAGR Magnesium, Random, U Yes, (order MAGRU) Yes
CLUR Chloride, Random, U Yes, (order RCHLU) Yes
POUR Phosphorus, Pediatric, Random, U Yes, (order RPHOC) Yes
SULFR Sulfate, Random, U No Yes
CITRR Citrate Excretion, Peds, Random, U Yes, (order CITRA) Yes
OXUR Oxalate, Pediatric, Random, U Yes, (order ROXUR) Yes
UPHR pH, Random, U No Yes
URCUR Uric Acid, Random, U Yes, (order RURC1) Yes
CTURR Creatinine, Random, U Yes, (order RCTUR) Yes
UOSMR Osmolality, Random, U No Yes
RAMCN Ammonium, Random, U Yes, (order RAMBO) Yes

Method Name


UOSMR: Freezing Point Depression

SULFR: High-Performance Ion Chromatography (HPIC)

MAGR: Colorimetric Endpoint Assay

CACR2: Photometric

POUR: Molybdic Acid

UPHR: pH Meter

NAUR, KURR, CLUR: Potentiometric, Indirect Ion-Selective Electrode (ISE)

CTURR: Enzymatic Colorimetric Assay

URCUR: Uricase

Reporting Name

Supersaturation, Peds, Random, U

Specimen Type


Ordering Guidance

A timed 24-hour urine collection is the preferred specimen for measuring and interpreting this profile to determine kidney stone risk factors (order SAT24 / Supersaturation Profile, 24 Hour, Urine. Random collections with individual analytes normalized to urinary creatinine may be of some clinical use in patients who cannot collect a 24-hour specimen, typically small children. Therefore, this test is offered on random collections for children less than 16 years old.


X-ray dyes and contrast media will affect uric acid test results.


-If a kidney X-ray with dye or computerized tomography (CT) scan with contrast has been performed, patient should wait a minimum of 1 day before starting collection.

-If a cholangiography (bile duct X-ray) has performed, patient should wait 7 days before starting collection.

-Urine must be collected before tablets have been taken for gallbladder X-ray, otherwise patient should wait 7 days before starting collection.

Additional Testing Requirements


Necessary Information

Patient's age is required.

Specimen Required


Urine Tubes, 10 mL (T068)

Aliquot Tubes, 5 mL (T465)

Container/Tube: 3 Plastic, 10-mL urine tubes and 4 plastic, 5-mL tubes

Specimen Volume: 40 mL

Collection Instructions:

1. Collect a random urine specimen and divide the urine into 6 tubes.

2. Refrigerate specimen after collection. Specimen pH should be between 4.5 and 8 and will stay in this range if kept refrigerated. Specimens with pH over 8 indicate bacterial contamination and testing will be canceled. Do not attempt to adjust pH as it will adversely affect results.

Specimen Minimum Volume

30 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Urine Refrigerated 14 days

Reference Values

pH: 4.5 to 8.0



0-11 months: 50-750 mOsm/kg

≥12 months: 150-1,150 mOsm/kg



18-77 years: 3-65 mmol/L

No reference values established for patient younger than 18 years and older than 77 years of age



1 month-<12 months: 0.03-0.81 mg/mg creat

12 months-<24 months: 0.03-0.56 mg/mg creat

24 months-<3 years: 0.02-0.50 mg/mg creat

3 years-<5 years: 0.02-0.41 mg/mg creat

5 years-<7 years: 0.01-0.30 mg/mg creat

7 years-<10 years: 0.01-0.25 mg/mg creat

10 years-<18 years: 0.01-0.24 mg/mg creat

18 years-83 years: 0.05-0.27 mg/mg creat

Reference values have not been established for patients who are younger than1 month of age.

Reference values have not been established for patients who are older than 83 years of age.



Magnesium/Creatinine Ratio:

1 month-<12 months: 0.10-0.48 mg/mg creat

12 months-<24 months: 0.09-0.37 mg/mg creat

24 months-<3 years: 0.07-0.34 mg/mg creat

3 years-<5 years: 0.07-0.29 mg/mg creat

5 years-<7 years: 0.06-0.21 mg/mg creat

7 years-<10 years: 0.05-0.18 mg/mg creat

10 years-<14 years: 0.05-0.15 mg/mg creat

14 years-<18 years: 0.05-0.13 mg/mg creat

18 years-83 years: 0.04-0.12 mg/mg creat

Reference values have not been established for patients who are younger than 1 month of age.

Reference values have not been established for patients who are older than 83 years of age

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information



82507-Citrate excretion










84560-Uric acid


LOINC Code Information

Test ID Test Order Name Order LOINC Value
SSATR Supersaturation, Peds, Random, U In Process


Result ID Test Result Name Result LOINC Value
SULFR Sulfate, Random, U 2975-1
UOSMR Osmolality, Random, U 2695-5
UPHR pH, Random, U 2756-5
CITR1 Citrate Concentration, Peds, Random, U 2128-7
RCHLU Chloride, Random, U 2078-4
RCTUR Creatinine, Random, U 2161-8
RKUR Potassium, Random, U 2828-2
RNAUR Sodium, Random, U 2955-3
OXCON Oxalate, Pediatric, Random, U 15086-2
31241 Calcium Oxalate Crystal In Process
POCON Phosphorus, Pediatric, Random, U 2778-9
URCO2 Uric Acid, Random, U 3086-6
MGCON Magnesium, Random, U 19124-7
CALC4 Calcium, Random, U 17862-4
RAMCN Ammonium, Random, U 1842-4
CACTR Calcium/Creatinine Ratio 9321-1
MGCTR Magnesium/Creatinine Ratio 13474-2
RATO6 Uric Acid/Creat Ratio, Random, U 3089-0
RATO5 Phosphorus/Creatinine Ratio 11141-9
31242 Brushite Crystal In Process
OXCO2 Oxalate Concentration 2700-3
RATO8 Citrate/Creatinine Ratio 13722-4
RATO7 Oxalate/Creatinine Ratio 13483-3
31243 Hydroxyapatite Crystal In Process
31244 Uric Acid Crystal In Process
31245 Sodium Urate Crystal In Process
31246 Interpretation 69051-1

NY State Approved



If not ordering electronically, complete, print, and send a Renal Diagnostics Test Request (T830) with the specimen.

Test Classification

This test was developed, and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the US Food and Drug Administration.

Day(s) Performed

Monday through Friday

Report Available

2 to 5 days