CITRATE 24 HR URINE
General Information
HLAB/HOL Code: CITU
UPHSM LIS Test #: 026663
Schedule:
Testing Time: 3-5 Days
Testing Lab: Labcorp
UPHSM LIS Test #: 026663
Schedule:
Testing Time: 3-5 Days
Testing Lab: Labcorp
Specimen Info
Only 1 specimen type required, unless otherwise specified
Volume: 10mL
Temperature: Refrigerated
Tube Type: Urine - 24 hr collection (acidified OR frozen)
Collection Info:
24-HOUR URINE COLLECTION:
Collect 24-hour urine with 30 mL 6N HCl. Caution: Strong acid. Mix well.
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 collection started and finished. Keep container refrigerated during collection.
Preservative is not necessary during collection but should be added to urine collection within 24 hours. Final pH must be 1 to 3.
Measure and record on the request form 24-hour total volume and send 10 mL (2.5 mL minimum Note: This volume does not allow for repeat testing.) aliquot to the laboratory.
Alternatively, the sample may be frozen without added acid.
Temperature: Refrigerated
Tube Type: Urine - 24 hr collection (acidified OR frozen)
Collection Info:
24-HOUR URINE COLLECTION:
Collect 24-hour urine with 30 mL 6N HCl. Caution: Strong acid. Mix well.
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 collection started and finished. Keep container refrigerated during collection.
Preservative is not necessary during collection but should be added to urine collection within 24 hours. Final pH must be 1 to 3.
Measure and record on the request form 24-hour total volume and send 10 mL (2.5 mL minimum Note: This volume does not allow for repeat testing.) aliquot to the laboratory.
Alternatively, the sample may be frozen without added acid.
Specimen Acceptability
CAUSES FOR REJECTION: Acetic or boric acid used as a preservative.
Methods
Spectrophotometry (kinetic at 340 nm)
Clinical Utilities
The mean urinary citrate excretion rate in patients with idiopathic calcium urolithiasis has been found to be significantly lower than that of control groups. Hypocitraturia is common in patients with urolithiasis resulting from renal tubular acidosis and in patients with enteric hyperoxaluria. Citrate excretion is low in renal insufficiency.
CPT Codes
82507
* The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding
is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.
Reference Range
See Report.
Component Info
Name: 24 HR URINE CITRATE
Method:
CPT Code:
Ref Range: 280 - 1240 mg/24hr
Comp Units: mg/24H
Method:
CPT Code:
Ref Range: 280 - 1240 mg/24hr
Comp Units: mg/24H
Name: 24 HR URINE CREATININE
Method:
CPT Code:
Ref Range: 1.0-2.0 g/24 H Male, 0.8-1.8 g/24h Female
Comp Units: g/24H
Method:
CPT Code:
Ref Range: 1.0-2.0 g/24 H Male, 0.8-1.8 g/24h Female
Comp Units: g/24H
Name: TOTAL VOLUME 24 HR
Method:
CPT Code:
Ref Range: 600-2000 mL
Comp Units: mL
Method:
CPT Code:
Ref Range: 600-2000 mL
Comp Units: mL
