24 Hour Urine, Citric Acid (Citrate) Build info

Synonyms

• CITRATE, URINE, 24 HOUR
• 24HR
• 24 HR
• LAB377

Short Name

CITRATE URIN

Procedure Master Number

LAB377

Procedure ID

35249

Clinical Info

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.

Specimen Type

Urine

Container

24hr Ur 30mL 6N HCl

Collection Instructions

Container/Tube: 24-hour urine collection with 30 mL 6N HCL preservative or add to container more than 24 hrs after collection
Specimen: Entire collection or 2 mL aliquot.(1 mL min)
Transport Temperature: Refrigerate specimen during collection and transport. If no preservative please freeze

Note: 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.
Alternatively, the sample may be frozen without added acid.

Transport Instructions

Refrigerate specimen during collection and transport. If no preservative please freeze

Specimen Stability

29 Days Room Temperature
29 Days Refrigerated
49 Days Frozen

Methodology

Nuclear magmatic resonance (NMR)

Days Performed

Performing Laboratory

LabCorp

CPT

82507
 
LOINC Code: 6687-8

PDM

5900451

Results