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HelpTest Code HEXU Iohexol, Timed Collection, Urine
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Reporting Name
Iohexol, USpecimen Type
UrineSpecimen Required
Supplies: Sarstedt Aliquot Tube, 5 mL (T914)
Container/Tube: Plastic vial
Specimen Volume: 5 mL
Collection Instructions: Collect a timed urine specimen. Timing may be variable and patient dependent.
Reject Due To
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Urine | Refrigerated (preferred) | 7 days |
| Frozen | 35 days | |
| Ambient | 7 days |
Specimen Minimum Volume
0.5 mL
Day(s) Performed
Monday through Friday
Specimen Retention Time
7 daysReport Available
3 to 4 daysReference Values
Not applicable
Useful For
Determining glomerular filtration rate in urine specimens
CPT Code Information
82542
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| HEXU | Iohexol, U | 93973-6 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 61712 | Iohexol, U | 93973-6 |
Method Description
Timed urine specimens are obtained after subcutaneous injection of nonradiolabeled iohexol. Iohexol results are acquired via a liquid chromatography tandem mass spectrometry (LC-MS/MS) system. A ThermoFisher LX-2 Cohesive high-performance liquid chromatography system and an ABSciex 5500 MS/MS are used for analysis.(Seegmiller JC, Burns BE, Lieske JC, et al. Discordant glomerular filtration rate determinations between iothalamate and iohexol renal clearances. Poster presented at: Renal Week 2010. 43rd Annual Meeting of the American Society of Nephrology; November 16-21, 2010; Denver, CO)
Forms
If not ordering electronically, complete, print, and send a Renal Diagnostics Test Request (T830) with the specimen.