Creatinine Clearance
Order Code:
CRCL
Test Summary
Creatinine Clearance is used to evaluate the glomerular filtration rate (GFR). Clearance is defined as that volume of plasma from which a measured amount of substance could be completely eliminated into the urine per unit of time.
Aliases
- CRCL
Specimen Collection
Special Instructions
N/A
Preferred Specimen
1 mL serum & 24 hr urine
Minimum Volume
2 mL
Instructions
Urine, 24 Hour Collection: Proper collection of 24-hour urine specimens is essential for accurate test results. Instruct patient thoroughly in the correct procedure. Printed instructions for the patient are available from the laboratory.
1. Unless the physician indicates otherwise, instruct the patient to maintain the usual amount of liquid intake but to consume no alcoholic beverages.
2. During the collection period, place the 24-hour urine container provided by CompuNet in a refrigerator or cool place.
3. Have the patient empty his/her bladder in the morning into the toilet (Do NOT include in the 24-hour collection). Write the date and time of voiding on the container label.
4. Collect the patient's next voiding and add it as soon as possible to the 24-hour container.
5. Add all subsequent voiding to the container as in Step 4. The last sample collected should be the first specimen voided the following morning at the same time as the previous morning's first voiding.
Submit a 10 ml aliquot of the 24 hour urine along with the SST tube. Record the 24 hour volume as well as the patient height and weight on the requisition form. Serum sample: Avoid hemolysis. Allow to clot in an upright position for 30 minutes. Centrifuge for 10 minutes. Keep tightly stoppered.
1. Unless the physician indicates otherwise, instruct the patient to maintain the usual amount of liquid intake but to consume no alcoholic beverages.
2. During the collection period, place the 24-hour urine container provided by CompuNet in a refrigerator or cool place.
3. Have the patient empty his/her bladder in the morning into the toilet (Do NOT include in the 24-hour collection). Write the date and time of voiding on the container label.
4. Collect the patient's next voiding and add it as soon as possible to the 24-hour container.
5. Add all subsequent voiding to the container as in Step 4. The last sample collected should be the first specimen voided the following morning at the same time as the previous morning's first voiding.
Submit a 10 ml aliquot of the 24 hour urine along with the SST tube. Record the 24 hour volume as well as the patient height and weight on the requisition form. Serum sample: Avoid hemolysis. Allow to clot in an upright position for 30 minutes. Centrifuge for 10 minutes. Keep tightly stoppered.
Patient Preparation
N/A
Storage
Original tube preferred, may be sent in a screw-top transfer tube
PLUS
a 24 HR urine container
PLUS
a 24 HR urine container
Transport Temperature
Refrigerated
Specimen Stability
- Room Temperature = 2 days
- Refrigerated = 6 days
- Frozen = 6 months
Limitations
N/A
Other Acceptable Specimens
Plasma from Lithium Heparin (Light Green Top) tube
Unacceptable Specimens
Hemolysis, Lipemia, incorrect specimen type, insufficient sample volume, improper storage conditions, exceeds specimen stability guidelines, contaminated sample.
Order Code
CRCL
EPIC (Premier) Code
LAB10025
Includes
N/A
CPT Code
- 82575
Billing Code
- 300211
CPT Statement
Methodology
Spectrophotometry (SP)
FDA Status
FDA Approved
Physician Attestation of Informed Consent
N/A
Testing Laboratory
CompuNet Clinical Laboratories, LLC
2308 Sandridge Drive
Moraine OH, 45439
2308 Sandridge Drive
Moraine OH, 45439
Department
Chemistry
Reference Range
See Report
Setup Schedule / Expected Turnaround Time
24/7; Report available: Within 1 day of set up
Specimen Collection
Special Instructions
N/A
Preferred Specimen
1 mL serum & 24 hr urine
Minimum Volume
2 mL
Instructions
Urine, 24 Hour Collection: Proper collection of 24-hour urine specimens is essential for accurate test results. Instruct patient thoroughly in the correct procedure. Printed instructions for the patient are available from the laboratory.
1. Unless the physician indicates otherwise, instruct the patient to maintain the usual amount of liquid intake but to consume no alcoholic beverages.
2. During the collection period, place the 24-hour urine container provided by CompuNet in a refrigerator or cool place.
3. Have the patient empty his/her bladder in the morning into the toilet (Do NOT include in the 24-hour collection). Write the date and time of voiding on the container label.
4. Collect the patient's next voiding and add it as soon as possible to the 24-hour container.
5. Add all subsequent voiding to the container as in Step 4. The last sample collected should be the first specimen voided the following morning at the same time as the previous morning's first voiding.
Submit a 10 ml aliquot of the 24 hour urine along with the SST tube. Record the 24 hour volume as well as the patient height and weight on the requisition form. Serum sample: Avoid hemolysis. Allow to clot in an upright position for 30 minutes. Centrifuge for 10 minutes. Keep tightly stoppered.
1. Unless the physician indicates otherwise, instruct the patient to maintain the usual amount of liquid intake but to consume no alcoholic beverages.
2. During the collection period, place the 24-hour urine container provided by CompuNet in a refrigerator or cool place.
3. Have the patient empty his/her bladder in the morning into the toilet (Do NOT include in the 24-hour collection). Write the date and time of voiding on the container label.
4. Collect the patient's next voiding and add it as soon as possible to the 24-hour container.
5. Add all subsequent voiding to the container as in Step 4. The last sample collected should be the first specimen voided the following morning at the same time as the previous morning's first voiding.
Submit a 10 ml aliquot of the 24 hour urine along with the SST tube. Record the 24 hour volume as well as the patient height and weight on the requisition form. Serum sample: Avoid hemolysis. Allow to clot in an upright position for 30 minutes. Centrifuge for 10 minutes. Keep tightly stoppered.
Patient Preparation
N/A
Storage
Original tube preferred, may be sent in a screw-top transfer tube
PLUS
a 24 HR urine container
PLUS
a 24 HR urine container
Transport Temperature
Refrigerated
Specimen Stability
- Room Temperature = 2 days
- Refrigerated = 6 days
- Frozen = 6 months
Limitations
N/A
Other Acceptable Specimens
Plasma from Lithium Heparin (Light Green Top) tube
Unacceptable Specimens
Hemolysis, Lipemia, incorrect specimen type, insufficient sample volume, improper storage conditions, exceeds specimen stability guidelines, contaminated sample.
Result Information
Methodology
Spectrophotometry (SP)
Testing Laboratory
N/A
Reference Range
See Report
Setup Schedule / Expected Turnaround Time
24/7; Report available: Within 1 day of set up