Sorted By Test Name - Mayo Medical Laboratories

OXU
8669
of oxalate can be increased by increased absorption from the intestine after consuming foods such as
rhubarb, nuts, chocolate, or tea. -Certain abnormalities of the gastrointestinal tract, including fat
malabsorption, short bowel syndromes, and abnormal bile salt metabolism, all result in increased oxalate
absorption from the intestinal tract. -Increased pool size can result from decreased urinary excretion as
occurs in chronic renal insufficiency. Management of patients with primary hyperoxaluria and renal
failure is difficult. Intensive dialyses are undertaken in an attempt to keep plasma levels below the level at
which supersaturation is thought to occur. Primary hyperoxaluria is typically diagnosed by measuring
oxalate levels in urine. However, as kidney function decreases, the renal excretion of oxalate also
decreases. In such situations, plasma oxalate levels may be informative. Plasma oxalate is often used to
monitor these patients during critical periods in and around kidney transplantation, dialysis, or liver
transplantation. High value suggestive of primary hyperoxaluria. However if the patient has chronic
kidney disease (GFR