Supersaturation Profile, Self-Collect, 24 Hour, Urine
Use
The test is used for the diagnosis and management of patients with renal lithiasis. It predicts the likely composition of the stone in patients with radiopaque stones when stone analysis is unavailable. This test can aid in designing treatment programs and identifying specific risk factors for stones using a 24-hour urine collection. It is also useful for monitoring the effectiveness of therapy by confirming decreased crystallization potential, evaluating kidney excretion of acid, urine pH, and estimating protein intake.
Special Instructions
Urine specimens for this test are collected by the patient and must be sent directly to Mayo Clinic Laboratories using the provided collection kit. It is essential to ensure that patient information, including height, weight, and address, is included with the order, particularly for patients under 18 years old. Collection must be scheduled at least 3 days in advance.
Limitations
X-ray dyes and contrast media can affect uric acid test results, and therefore, should be avoided before specimen collection. Patients should wait specified times after certain radiological procedures before starting the urine collection to avoid interference.
New York Approved
Methodology
Culture-based
Biomarkers
LOINC Codes
- 81232-1
- 2162-6
- 25308-8
- 6874-2
- 6687-8
- 14862-7
- 2701-1
- 2079-2
- 8277-6
- 3137-7
- 29463-7
- 2829-0
- 24447-5
- 2956-1
- 2694-8
- 93746-6
- 2779-7
- 26889-6
- 3096-5
- 27378-9
- 3087-4
- 69051-1
- 81623-1
- 101825-8
- 81622-3
- 101827-4
- 13362-9
- 3167-4
Result Turnaround Time
2-5 days
Related Documents
For more information, please review the documents below
Specimen
Urine
Volume
35 mL
Minimum Volume
16 mL
Container
24-hour graduated urine container with no metal cap or glued insert
Collection Instructions
Order test each time the patient is to collect a 24-hour urine specimen at home and mail the specimen directly to Mayo Clinic Laboratories. The order should be placed a minimum of 3 days before the desired collection date. The SSH24 Home Collection kit will be mailed directly to the patient for self-collection.
Patient Preparation
If a kidney X-ray with dye or CT scan with contrast has been performed, the patient should wait at least 24 hours before starting collection. Wait 7 days after cholangiography or gallbladder X-ray tablets.
Storage Instructions
Transport the specimen refrigerated (preferred) within 14 days. Ambient conditions are acceptable for up to 72 hours, and frozen for up to 14 days.
Causes for Rejection
Reject if pH 8.0
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 72 hours |
| Refrigerated | 14 days |
| Frozen | 14 days |