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HelpTest ID SUP24 Supersaturation Profile, 24 Hour, Urine
Ordering Guidance
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.
Necessary Information
1. 24-Hour volume is required.
2. Patient's height in centimeters and weight in kilograms are required if patient is younger than 18 years.
Specimen Required
Supplies: Diazolidinyl Urea (Germall) 5.0 mL (T822)
Collection Container/Tube: 24-hour graduated urine container with no metal cap or glued insert
Submission Container/Tube: Plastic, 60-mL urine bottle
Specimen Volume: 35 mL
Collection Instructions:
1. Collect urine for 24 hours.
2. Add 5 mL of diazolidinyl urea as preservative at start of collection or refrigerate specimen during and after collection.
3. Specimen pH should be between 4.5 and 8 and will stay in this range if kept refrigerated. Specimens with pH above 8 indicate bacterial contamination, and testing will be canceled. Do not attempt to adjust pH as it will adversely affect results.
Additional Information: See Urine Preservatives-Collection and Transportation for 24-Hour Urine Specimens for multiple collections.
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.
Aiding in identification of specific risk factors for stones using a 24-hour urine collection
Monitoring the effectiveness of therapy by confirming that the crystallization potential has indeed decreased
Evaluating kidney excretion of acid and urine pH
Estimating a patient's protein intake
Profile Information
| Test ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| SSINT | Supersaturation, 24 HR, U 1 | No | Yes |
| NAUT | Sodium, 24 HR, U | Yes, (order NAU) | Yes |
| KUT | Potassium, 24 HR, U | Yes, (order KUR) | Yes |
| CALUT | Calcium, 24 HR, U | Yes, (order CALU) | Yes |
| MAGT | Magnesium, 24 HR, U | Yes, (order MAGU) | Yes |
| CLUT | Chloride, 24 HR, U | Yes, (order CLU) | Yes |
| POUT | Phosphorus, 24 HR, U | Yes, (order POU) | Yes |
| SULFT | Sulfate, 24 HR, U | Yes, (order SULFU) | Yes |
| CITT | Citrate Excretion, 24 HR, U | Yes, (order CITR) | Yes |
| OXUT | Oxalate, 24 HR, U | Yes, (order OXU) | Yes |
| UPHT | pH, 24 HR, U | Yes, (order PHU_) | Yes |
| URICT | Uric Acid, 24 HR, U | Yes, (order URCU) | Yes |
| CTUT | Creatinine, 24 HR, U | Yes, (order URCU) | Yes |
| OSMUT | Osmolality, 24 HR, U | Yes, (order UOSMU) | Yes |
| AMMT | Ammonium, 24 HR, U | Yes, (order AMMO) | Yes |
| UNT | Urea Nitrogen, 24 HR, U | No | Yes |
| PCRUT | Protein Catabolic Rate, 24 HR, U | No | Yes |
| DEMO9 | Patient Demographics | No | Yes |
Special Instructions
Method Name
AMMT, CITT, OXUT: Enzymatic
OSMUT: Freezing Point Depression
SULFT: High-Performance Ion Chromatography (HPIC)
CALUT, POUT: Photometric
MAGT: Colorimetric Endpoint Assay
UPHT: pH Meter
NAUT, KUT, CLUT: Potentiometric, Indirect Ion-Selective Electrode (ISE)
CTUT: Enzymatic Colorimetric Assay
URICT: Uricase
UNT: Kinetic UV Assay
PCRUT, SSINT: Calculation
Reporting Name
Supersaturation, 24 HR, USpecimen Type
UrineSpecimen Minimum Volume
25 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Urine | Refrigerated | 14 days |
Reference Values
SUPERSATURATION REFERENCE MEANS (Delta G: DG)
Calcium oxalate: 1.77 DG
Brushite: 0.21 DG
Hydroxyapatite: 3.96 DG
Uric acid: 1.04 DG
INDIVIDUAL URINE ANALYTES
OSMOLALITY, 24 HOUR, URINE
0-11 months: 50-750 mOsm/kg
≥12 months: 150-1,150 mOsm/kg
pH, 24 HOUR, URINE
4.5-8.0
SODIUM, 24 HOUR, URINE
≥18 years: 22-328 mmol/24 hours
Reference values have not been established for patients who are less than 18 years of age.
POTASSIUM, 24 HOUR, URINE
≥18 years: 16-105 mmol/24 hours
Reference values have not been established for patients who are less than 18 years of age.
CALCIUM, 24 HOUR, URINE
Males: <250 mg/24 hours
Females: <200 mg/24 hours
Reference values have not been established for patients who are less than 18 years of age.
MAGNESIUM, 24 HOUR, URINE
51-269 mg/24 hours
Reference values have not been established for patients who are younger than 18 years of age.
CHLORIDE, 24 HOUR, URINE
≥18 years: 34-286 mmol/24 hours
Reference values have not been established for patients who are younger than 18 years of age.
PHOSPHORUS, 24 HOUR, URINE
≥18 years: 226-1,797 mg/24hours
Reference values have not been established for patients who are less younger 18 years of age.
SULFATE, 24 HOUR, URINE
7-47 mmol/24 hours
CITRATE EXCRETION, 24 HOUR, URINE
0-19 years: Not established
20 years: 150-1,191 mg/24 hours
21 years: 157-1,191 mg/24 hours
22 years: 164-1,191 mg/24 hours
23 years: 171-1,191 mg/24 hours
24 years: 178-1,191 mg/24 hours
25 years: 186-1,191 mg/24 hours
26 years: 193-1,191 mg/24 hours
27 years: 200-1,191 mg/24 hours
28 years: 207-1,191 mg/24 hours
29 years: 214-1,191 mg/24 hours
30 years: 221-1,191 mg/24 hours
31 years: 228-1,191 mg/24 hours
32 years: 235-1,191 mg/24 hours
33 years: 242-1,191 mg/24 hours
34 years: 250-1,191 mg/24 hours
35 years: 257-1,191 mg/24 hours
36 years: 264-1,191 mg/24 hours
37 years: 271-1,191 mg/24 hours
38 years: 278-1,191 mg/24 hours
39 years: 285-1,191 mg/24 hours
40 years: 292-1,191 mg/24 hours
41 years: 299-1,191 mg/24 hours
42 years: 306-1,191 mg/24 hours
43 years: 314-1,191 mg/24 hours
44 years: 321-1,191 mg/24 hours
45 years: 328-1,191 mg/24 hours
46 years: 335-1,191 mg/24 hours
47 years: 342-1,191 mg/24 hours
48 years: 349-1,191 mg/24 hours
49 years: 356-1,191 mg/24 hours
50 years: 363-1,191 mg/24 hours
51 years: 370-1,191 mg/24 hours
52 years: 378-1,191 mg/24 hours
53 years: 385-1,191 mg/24 hours
54 years: 392-1,191 mg/24 hours
55 years: 399-1,191 mg/24 hours
56 years: 406-1,191 mg/24 hours
57 years: 413-1,191 mg/24 hours
58 years: 420-1,191 mg/24 hours
59 years: 427-1,191 mg/24 hours
60 years: 434-1,191 mg/24 hours
>60 years: Not established
OXALATE, 24 HOUR, URINE
0.11-0.46 mmol/24 hours
9.7-40.5 mg/24 hours
Reference values have not been established for patients who are younger than 16 years of age.
URIC ACID, 24 HOUR, URINE
Males: ≥18 years: 200-1,000 mg/24 hours
Females: ≥18 years: 250-750 mg/24 hours
Reference values have not been established for patients who are younger than 18 years of age.
CREATININE, 24 HOUR, URINE
Males: ≥18 years: 930-2,955 mg/24 hours
Females: ≥18 years: 603-1,783 mg/24 hours
Reference values have not been established for patients who are younger than 18 years of age.
AMMONIUM, 24 HOUR, URINE
15-56 mmol/24 hour
Reference values have not been established for patients who are younger than 18 years or older than 77 years of age.
UREA NITROGEN, 24 HOUR, URINE
≥18 years: 7-42 g/24h
Reference values have not been established for patients who are younger than 18 years of age.
PROTEIN CATABOLIC RATE, 24 HOUR, URINE
56-125 g/24 hours
Day(s) Performed
Monday through Friday
Report Available
2 to 5 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
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.CPT Code Information
82340-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
84540-Urea Nitrogen
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| SUP24 | Supersaturation, 24 HR, U | 81232-1 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| CRU24 | Creatinine, 24 HR, U | 2162-6 |
| AMU24 | Ammonium, 24 HR, U | 25308-8 |
| CAU24 | Calcium, 24 HR, U | 6874-2 |
| CIT24 | Citrate Excretion, 24 HR, U | 6687-8 |
| CLU24 | Chloride, 24 HR, U | 2079-2 |
| KU24 | Potassium, 24 HR, U | 2829-0 |
| MGU24 | Magnesium, 24 HR, U | 24447-5 |
| NAU24 | Sodium, 24 HR, U | 2956-1 |
| UOSMT | Osmolality, 24 HR, U | 2694-8 |
| PCRUT | Protein Catabolic Rate, 24 HR, U | 93746-6 |
| POU24 | Phosphorus, 24 HR, U | 2779-7 |
| SUL24 | Sulfate, 24 HR, U | 26889-6 |
| UNU24 | Urea Nitrogen, 24 HR, U | 3096-5 |
| UPHT | pH, 24 HR, U | 27378-9 |
| URC24 | Uric Acid, 24 HR, U | 3087-4 |
| 616217 | Calcium Oxalate Crystal | 81623-1 |
| BSA1 | Patient Surface Area | 8277-6 |
| OXM24 | Oxalate, 24 HR, U (mmol/24 HR) | 14862-7 |
| OXG24 | Oxalate, 24 HR, U (mg/24 HR) | 2701-1 |
| HT6 | Height (cm) | 3137-7 |
| 616218 | Brushite Crystal | 101825-8 |
| 616219 | Hydroxyapatite Crystal | 81622-3 |
| WT6 | Weight (kg) | 29463-7 |
| 616220 | Uric Acid Crystal | 101827-4 |
| SSDUR | Collection Duration | 13362-9 |
| SSVOL | Volume | 3167-4 |
| 21060 | Interpretation | 69051-1 |