Test Details
Mnemonic
UCI24
Ordering Code
1005020
CPT-4 Code(s)
82507, 82570
Specimen Information
Collect
24 hour urine. The bladder must be emptied at the time the collection is to begin and this urine is discarded. Thereafter all urine must be collected until the end of the scheduled time and kept refrigerated during collection.
Collect urine with 10 grams of boric acid at the start of collection. Refrigerate urine during collection (critical). Mix the collection well before checking the pH and ensure boric acid tablet is well dissolved. pH should be between 4-7.
Collect urine with 10 grams of boric acid at the start of collection. Refrigerate urine during collection (critical). Mix the collection well before checking the pH and ensure boric acid tablet is well dissolved. pH should be between 4-7.
Specimen Preparation
Send 25.0 mL urine refrigerated in a screw capped plastic urine container. Record total volume on requisition and specimen label.
Alternate Specimen
Refrigerate urine during collection (critical) and add 10 grams of boric acid to the entire collection within 4 hours of completing. Mix the collection well before checking the pH and ensure that boric acid tablet is well dissolved. pH should be between 4 - 7. Record total volume on both the requisition and specimen label. Send 25.0 mL aliquot refrigerated in a screw-capped plastic urine container.
Minimum Volume
10.0 mL
Transport Temperature
Refrigerated
Rejection Criteria
Samples with incorrect pH
Stability
Room temperature: Unacceptable
Refrigerated: 14 days
Frozen: 60 days
Refrigerated: 14 days
Frozen: 60 days
Methodology
Spectrophotometry
Reference Range
Citrate 24 hr Urine: 280 - 1240 mg/24 hr
Creatinine 24 hr Urine: Males: 1 - 2 g/24 hr
Females: 0.8 - 1.8 g/24 hr
Creatinine 24 hr Urine: Males: 1 - 2 g/24 hr
Females: 0.8 - 1.8 g/24 hr
Performing Laboratory
Warde Medical Laboratory
New York DOH Approval Status
No