Oxalate/Creatinine Ratio
random oxalate, oxalate
56.34
Ascorbic acid (vitamin C) at very high concentrations can interfere. It is recommended that patients refrain from taking excessive amounts of vitamin C or vitamin C rich foods for at least 48 hours prior to urine collection.
Only to be analysed on patients <14 years of age
A random first morning urine (ideally collected prior to eating).
Should be sent to lab without delay
Add acid immediately, pH
Acidified and Frozen, pH must be <2.
Biochemistry
6 weekly
45 days
Cobas Pro
umol/mmol
Age | Oxalate/ Creatinine Ratio (umol/mmol) |
0-6 months | <280 |
6 months - 1 year | <230 |
1 - 1.5 Years | <180 |
1.5 - 2.5 years | <140 |
2.5 - 3.5 years | <125 |
3.5 - 4.5 years | <110 |
4.5 - 5.5 years | <100 |
5.5 - 6.5 years | <90 |
6.5 - 15 years | <80 |
>15 years | <40 |
15%
.
Only to be analysed on patients <14 years of age.
For patients >14 years of age, we require a 24hr urine collected into an acid preservative
5ml
No
OXAU
$OXAU
N/A