Test Overview
Test Methodology

Enzymatic

Test Usage

Diagnosing risk factors for patients with calcium kidney stones. Monitoring results of therapy in patients with calcium stones or renal tubular acidosis

Reference Range *

0-19 years: not established
20 years: 150-1,191 mg/24 hours
21 years: 157-1,191 mg/24 hours
22 years: 164-1,191 mg/24 hours
23 years: 171-1,191 mg/24 hours
24 years: 178-1,191 mg/24 hours
25 years: 186-1,191 mg/24 hours
26 years: 193-1,191 mg/24 hours
27 years: 200-1,191 mg/24 hours
28 years: 207-1,191 mg/24 hours
29 years: 214-1,191 mg/24 hours
30 years: 221-1,191 mg/24 hours
31 years: 228-1,191 mg/24 hours
32 years: 235-1,191 mg/24 hours
33 years: 242-1,191 mg/24 hours
34 years: 250-1,191 mg/24 hours
35 years: 257-1,191 mg/24 hours
36 years: 264-1,191 mg/24 hours
37 years: 271-1,191 mg/24 hours
38 years: 278-1,191 mg/24 hours
39 years: 285-1,191 mg/24 hours
40 years: 292-1,191 mg/24 hours
41 years: 299-1,191 mg/24 hours
42 years: 306-1,191 mg/24 hours
43 years: 314-1,191 mg/24 hours
44 years: 321-1,191 mg/24 hours
45 years: 328-1,191 mg/24 hours
46 years: 335-1,191 mg/24 hours
47 years: 342-1,191 mg/24 hours
48 years: 349-1,191 mg/24 hours
49 years: 356-1,191 mg/24 hours
50 years: 363-1,191 mg/24 hours
51 years: 370-1,191 mg/24 hours
52 years: 378-1,191 mg/24 hours
53 years: 385-1,191 mg/24 hours
54 years: 392-1,191 mg/24 hours
55 years: 399-1,191 mg/24 hours
56 years: 406-1,191 mg/24 hours
57 years: 413-1,191 mg/24 hours
58 years: 420-1,191 mg/24 hours
59 years: 427-1,191 mg/24 hours
60 years: 434-1,191 mg/24 hours
>60 years: not established

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Details
Days Set Up
Monday - Saturday
Soft Order Code
MCITR
MiChart Code
Citrate Excretion, 24 Hour Urine
Synonyms
    Laboratory
    Sendout
    Reference Laboratory
    Mayo CITR
    Section
    Special Testing
    Specimen Requirements
    Collection Instructions

    Patient Preparation: Any drug that causes alkalemia or acidemia may be expected to alter citrate excretion and should be avoided, if possible. The patient must avoid laxative use for 24 hour collection period.
    Collect urine for 24 hours. Maintain refrigeration during entire collection. Mix well, and aliquot urine into a plastic vial. Send to Specimen Processing refrigerated

    Alternate Specimen

    24 hour urine preserved with Diazolidinyl Urea (Germall) 5.0 mL (Mayo supply #T822)

    Normal Volume

    4 mL urine

    Minimum Volume

    1 mL urine

    Storage Temperature
    Refrigerated preferred, frozen acceptable
    Additional Information

    Test performed by Mayo Clinic Laboratories

    Billing
    CPT Code
    82507
    Fee Code
    AB025
    NY State Approved
    No