Oxalate, 24 hr Urine OXALATE

Synonyms

Allscripts (AEHR) Order Name

Oxalate, 24 Hour, Urine

Sunrise Clinical Manager (SCM) Order Name

Oxalate, Urine

Clinical Info

Twenty-four hour urine collections 
for oxalate are indicated in patients with surgical loss of distal small intestine, especially those with Crohn's disease. The
incidence of nephrolithiasis in patients who have inflammatory bowel disease is 2.6% to 10%.1

Specimen Type

Urine

Container

24hr Ur 30mL 6N HCl

Collection Instructions

Container/Tube: 24 hour Urine Container 30 mL 6N HCL preservative.
Specimen: 10 mL aliquot from 24 hr Urine (2.5 mL min)
Transport Temperature: Refrigerated
Stability: 7 days , Room Temperature or Refrigerated
14 Days Frozen
Collection
Instruct patient to void at 8 AM (or 8 PM) 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 [or 8 PM] the following day). Label container with patient's name and date and time collection started and finished. Measure and record total urine volume. Mix well. pH must be <3. Preservative not necessary during collection but should be added to urine collection within 24 hours.
Patient Preparation
Avoid vitamin C supplements and vitamin C-rich foods (eg, citrus fruits like oranges, orange juice; vegetables like broccoli, tomatoes, peppers, potatoes) for 48 hours prior to collection.

Transport Instructions

Refrigerated

Specimen Stability

7 days , Room Temperature or Refrigerated
14 Days Frozen
Collection
Instruct patient to void at 8 AM (or 8 PM) and discard the specimen. Then collect all urine including the final specimen
voided at the end of the 24-hour collection p

Methodology

Enzymatic
 
TAT: 3-6 Days

Days Performed

Performing Laboratory

LabCorp

CPT

83945

PDM

5901478

Result Interpretation

• Children:
         <7 years: not established
          7 to 14 years: 13−38 mg/24 hours
•Adults:
     Male: 7−44 mg/24 hours
  Female: 4−31 mg/24 hours

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