10 mL (5 mL min.) aliquot of random Urine in 2 mL of 6N HCl to maintain pH below 3. Mix well before aliquoting. Ship refrigerated or frozen. Avoid vitamin C and citrus fruits 48 hrs prior to specimen collection.
Sample Wed Sat by 9 am; Report Same day
This assay is useful for monitoring therapy for kidney stones and identifying increased urinary oxalate as a risk factor for stone formation. It also helps in the diagnosis of Primary or Secondary hyperoxaluria. Ingestion of Ascorbic acid may falsely elevate urinary oxalate excretion.
Avoid vitamin C and citrus fruits 48 hours prior to specimen collection.