Sign in →

Test Code StoneB and StoneU Stone Profile Test

Important Note

Dietary/drug restrictions prior and during urine collection:

  • Do not take laxatives during the 24-hour collection period.
  • Refrain from taking vitamin C supplement or vitamin C rich food for at least 48-hours prior to urine collection.
  • Do not drink alcoholic beverages during 24-hour urine collection

Specimen Requirements

Collect urine in 24-hour urine container with a suitable preservative (available at Laboratory). 
Blood must be collected within the same 24-hour period as the urine collection.
Send both blood and urine specimens to the Laboratory. 
Dietary and drug restrictions apply.

 

STONEU

Specimen Type: 24 hours Urine
Container/Tube: 24 hour urine container with 3g Thymol
Volume:  4000mL
Minimum Volume: 20mL

 

Please refer to NUH's Urine Preservative Guide

 

___________________________________________________________________________

 

 

STONEB

Specimen Type: Serum
Container/Tube: Gold Top (SSTII)
Volume:  5.0mL
Minimum Volume: 0.5mL

Sample Stability

 

** Preferred temperatures for storage prior to and during shipping to NUH **

 

STONEU

 

Specimen Type: 24 hour Urine
Ambient: Send the sample to the laboratory immediately
Refrigerate: 2 days
Frozen: 2 weeks

 

 

STONEB

 

Specimen Type Serum
Ambient 1 day
Refrigerate 7 days
Frozen 2 weeks

 

Send in primary tube, do not aliquot. A consequent decrease in the CO2 value of up to 6 mEq/L can occur in the course of an hour once the specimen has been exposed to ambient air.

 

Reference Interval

See individual test listings for reference values (Related Tests field below)
 

Days and Times Performed

TAT 2-8 days

Methodology

See individual test listings for Methodology

 

STONEU

PH, URINE
CREATININE, URINE, RANDOM
UREA, URINE 
SODIUM, URINE
POTASSIUM, URINE
CALCIUM, URINE
PHOSPHATE, URINE
MAGNESIUM, URINE
URIC ACID, URINE
OXALATE, URINE
CITRATE URINE

 

___________________________________________________________________________

 

STONEB

SODIUM, SERUM

POTASSIUM, SERUM
CHLORIDE, SERUM
BICARBONATE, SERUM 
ALBUMIN, SERUM
CREATININE, SERUM
CALCIUM, SERUM
MAGNESIUM, SERUM
PHOSPHATE, SERUM
URIC ACID, SERUM

Service Code

31153

Update

Last updated 18/04/2023

Updated on Specimen requirements STONEU container/tube

Unacceptable Condition

 

Haemolysis NA
Icterus NA
Lipaemic NA
Others NA

 

Testing Laboratory

National University Hospital

Clinical Chemistry, 67724346

Useful For

Diagnosis and management of renal lithiasis

Related Tests