Aids in diagnosis of kidney stones. Aids in monitoring uric acid levels in patients at risk for kidney stone development (eg, gout).
Within 24 hours
New York DOH Approval Status
24-hour urine. Refrigerate specimen during collection. Also acceptable: Random urine.
Urine pH must be adjusted to greater than 8.0. If pH is less than or equal to 8.0, adjust pH to greater than 8.0 by adding 5 percent NaOH. Mix well and allow entire 24-hour collection to stand for 15 minutes. Recheck pH and readjust if necessary. Transfer one 3 mL aliquot from a well-mixed 24-hour collection to an ARUP Standard Transport Tube. (Min: 0.5 mL) Record total volume, collection time interval, and pH on transport tube or aliquot tube and on test request form.
Specimens with pH less than 8.0. Urine collected with acid.
Ambient: 4 days; Refrigerated: 2 weeks; Frozen: 1 month
Reference interval for random urine has not been established.
|Component Test Code*||Component Chart Name||LOINC|
|0020207||Creatinine, Urine - per volume||2161-8|
|0020208||Creatinine, Urine - per 24h||2162-6|
|0020218||Uric Acid, Urine - per volume||3086-6|
|0020219||Uric Acid, Urine - per 24h||3087-4|
- urine uric acid concentration
- urine uric acid level