Test Details
Result Turnaround Time
Within 1 day
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Test Includes
Serum creatinine; urine creatinine
Special Instructions
The test request form must state date and time collection started, date and time collection finished, and patient's height and weight. The request form should state 24-hour urine volume.
Specimen Requirements
Specimen
Serum and urine (24-hour)
Volume
1 mL serum and 10 mL aliquot of entire urine collection
Minimum Volume
0.5 mL serum and 0.5 mL urine aliquot
Container
Red-top tube, gel-barrier tube, green-top (heparin) tube, or lavender-top (EDTA) tube and plastic urine container, with or without 6N HCl
Collection Instructions
Separate serum from cells within 45 minutes of collection. For urine, instruct the patient to void at 8 AM and discard the specimen. Then collect all urine including the final specimen voided at the end of the 24-hour collection period (ie, 8 AM the next morning). Screw the lid on securely. Container must be labeled with patient's full name and date and time for a 24-hour collection. Submit both urine and serum simultaneously. It is preferable to collect the serum at the time the urine collection is completed or when the serum is brought to the draw station. The serum should be collected within 24 hours of the start or finish of the urine collection.
Stability Requirements
Temperature | Period |
|---|---|
Room temperature | 7 days |
Refrigerated | 14 days |
Frozen | 14 days |
Freeze/thaw cycles | Stable x3 |
Storage Instructions
Room temperature
Patient Preparation
Patient should avoid taking cephalosporins. Have patient drink water before the clearance is begun, and continue good hydration throughout the clearance. If possible, drugs should be stopped beforehand.
Causes for Rejection
No blood creatinine drawn; improper labeling
LOINC® Map
| Order Code | Order Code Name | Order Loinc | Result Code | Result Code Name | UofM | Result LOINC |
|---|---|---|---|---|---|---|
| 276024 | Creat Clearance, Normalized | 34555-3 | 001370 | Creatinine | mg/dL | 2160-0 |
| 276024 | Creat Clearance, Normalized | 34555-3 | 013672 | Creatinine, Urine | mg/dL | 2161-8 |
| 276024 | Creat Clearance, Normalized | 34555-3 | 013227 | Creatinine, Ur 24hr | mg/24 hr | 2162-6 |
| 276024 | Creat Clearance, Normalized | 34555-3 | 013029 | Creatinine Clearance | mL/min | 2164-2 |
| 276024 | Creat Clearance, Normalized | 34555-3 | 101140 | Patient Weight (lbs) | lbs | 3141-9 |
| 276024 | Creat Clearance, Normalized | 34555-3 | 101141 | Patient Height (In) | in | 3137-7 |
| 276024 | Creat Clearance, Normalized | 34555-3 | 101142 | Body Surface Area | meters sq | 8277-6 |
| 276024 | Creat Clearance, Normalized | 34555-3 | 101143 | Creat Clr (Corr.) | mL/min | 2164-2 |
| 276024 | Creat Clearance, Normalized | 34555-3 | 100779 | eGFR | mL/min/1.73 | 98979-8 |
| Order Code | 276024 | |||||
| Order Code Name | Creat Clearance, Normalized | |||||
| Order Loinc | 34555-3 | |||||
| Result Code | 001370 | |||||
| Result Code Name | Creatinine | |||||
| UofM | mg/dL | |||||
| Result LOINC | 2160-0 | |||||
| Order Code | 276024 | |||||
| Order Code Name | Creat Clearance, Normalized | |||||
| Order Loinc | 34555-3 | |||||
| Result Code | 013672 | |||||
| Result Code Name | Creatinine, Urine | |||||
| UofM | mg/dL | |||||
| Result LOINC | 2161-8 | |||||
| Order Code | 276024 | |||||
| Order Code Name | Creat Clearance, Normalized | |||||
| Order Loinc | 34555-3 | |||||
| Result Code | 013227 | |||||
| Result Code Name | Creatinine, Ur 24hr | |||||
| UofM | mg/24 hr | |||||
| Result LOINC | 2162-6 | |||||
| Order Code | 276024 | |||||
| Order Code Name | Creat Clearance, Normalized | |||||
| Order Loinc | 34555-3 | |||||
| Result Code | 013029 | |||||
| Result Code Name | Creatinine Clearance | |||||
| UofM | mL/min | |||||
| Result LOINC | 2164-2 | |||||
| Order Code | 276024 | |||||
| Order Code Name | Creat Clearance, Normalized | |||||
| Order Loinc | 34555-3 | |||||
| Result Code | 101140 | |||||
| Result Code Name | Patient Weight (lbs) | |||||
| UofM | lbs | |||||
| Result LOINC | 3141-9 | |||||
| Order Code | 276024 | |||||
| Order Code Name | Creat Clearance, Normalized | |||||
| Order Loinc | 34555-3 | |||||
| Result Code | 101141 | |||||
| Result Code Name | Patient Height (In) | |||||
| UofM | in | |||||
| Result LOINC | 3137-7 | |||||
| Order Code | 276024 | |||||
| Order Code Name | Creat Clearance, Normalized | |||||
| Order Loinc | 34555-3 | |||||
| Result Code | 101142 | |||||
| Result Code Name | Body Surface Area | |||||
| UofM | meters sq | |||||
| Result LOINC | 8277-6 | |||||
| Order Code | 276024 | |||||
| Order Code Name | Creat Clearance, Normalized | |||||
| Order Loinc | 34555-3 | |||||
| Result Code | 101143 | |||||
| Result Code Name | Creat Clr (Corr.) | |||||
| UofM | mL/min | |||||
| Result LOINC | 2164-2 | |||||
| Order Code | 276024 | |||||
| Order Code Name | Creat Clearance, Normalized | |||||
| Order Loinc | 34555-3 | |||||
| Result Code | 100779 | |||||
| Result Code Name | eGFR | |||||
| UofM | mL/min/1.73 | |||||
| Result LOINC | 98979-8 |