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HelpTest ID SSATR Supersaturation Profile, Pediatric, Random, Urine
Useful For
Diagnosis and management of patients with renal lithiasis:
-In patients who have a radiopaque stone, for whom stone analysis is not available, the supersaturation data can be used to predict the likely composition of the stone. This may help in designing a treatment program
-Individual components of the supersaturation profile can identify specific risk factors for stones
-During follow-up, changes in the urine supersaturation can be used to monitor the effectiveness of therapy by confirming that the crystallization potential has indeed decreased
-Urine ammonium can be used to evaluate renal 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 KNAUR) | Yes |
| KURR | Potassium, Random, U | Yes, (order RKUR) | Yes |
| CACR2 | Calcium, Random, U | Yes, (order CACR1) | Yes |
| MAGR | Magnesium, Random, U | Yes, (order MAGNR) | Yes |
| CLUR | Chloride, Random, U | Yes, (order RCHLU) | Yes |
| POUR | Phosphorus, Pediatric, Random, U | Yes, (order RPOU) | Yes |
| SULFR | Sulfate, Random, U | No | Yes |
| CITRR | Citrate Excretion, Peds, Random, U | Yes, (order RCITR) | Yes |
| OXUR | Oxalate, Pediatric, Random, U | Yes, (order ROXU) | Yes |
| UPHR | pH, Random, U | No | Yes |
| URCUR | Uric Acid, Random, U | Yes, (order RURCU) | 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
CITRR, RAMCN: Enzymatic
OXUR: Enzymatic Using Oxalate Oxidase
UOSMR: Freezing Point Depression
SULFR: High-Pressure Ion Chromatography (HPIC)
MAGR: Colorimetric Endpoint Assay
CACR2: Photometric, NM-BAPTA Reaction
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, USpecimen Type
UrineAdditional Testing Requirements
A timed 24-hour urine collection is the preferred specimen for measuring and interpreting this profile to determine kidney stone risk factors. 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.
Necessary Information
Patient's age is required.
Specimen Required
Supplies:
Urine Tubes, 10 mL (T068)
Aliquot Tubes, 5 mL (T465)
Container/Tube: 2 plastic, 10-mL urine tubes (T068) and 4 plastic, 5-mL urine tubes (T465)
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 (preferred) | 14 days | |
| Frozen | 14 days |
Reference Values
pH: 4.5-8.0
OSMOLALITY
0-11 months: 50-750 mOsm/kg
≥12 months: 150-1,150 mOsm/kg
AMMONIUM
18-77 years: 3-65 mmol/L
No reference values established for <18 years and >77 years of age
CALCIUM
Random Calcium/Creatinine Ratio:
18-83 years: <0.20 mg/mg
No reference values established for <18 years and >83 years of age
MAGNESIUM
Random Magnesium/Creatinine Ratio:
18-83 years: ≤0.035 mg/mg
No reference values established for <18 years and >83 years of age
Day(s) and Time(s) Performed
Monday through Friday; 8 a.m.-4 p.m.
Performing Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
82310-Calcium
82436-Chloride
82507-Citrate excretion
82570-Creatinine
83735-Magnesium
83935-Osmolality
83945-Oxalate
83986-pH
84105-Phosphorus
84133-Potassium
84300-Sodium
84392-Sulfate
84560-Uric acid
82140-Ammonium
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 | 5774-5 |
| 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/Creatinine Ratio | 3089-0 |
| RATO5 | Phosphorus/Creatinine Ratio | 11141-9 |
| 31242 | Brushite Crystal | 42673-4 |
| OXCO2 | Oxalate Concentration | 2700-3 |
| RATO8 | Citrate/Creatinine Ratio | 13722-4 |
| RATO7 | Oxalate/Creatinine Ratio | 13483-3 |
| 31243 | Hydroxyapatite Crystal | 81622-3 |
| 31244 | Uric Acid Crystal | 5817-2 |
| 31245 | Sodium Urate Crystal | 53788-6 |
| 31246 | Interpretation | 69051-1 |
NY State Approved
YesForms
If not ordering electronically, complete, print, and send a Renal Diagnostics Test Request (T830) with the specimen.