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AMYLASE, URINE
Message"The request form must state date and time collection started, date and time collection finished, and urine volume.
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Test Code
3293
CPT Codes
82150
Includes
"Amylase on random or timed urine collections
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Preferred Specimen
"Urine (timed)
10 mL aliquot
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10 mL aliquot
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Minimum Volume
"0.5 mL aliquot
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Instructions
"Collect timed specimen. Instruct the patient to void at the beginning of the collection period and discard the specimen. Collect all urine including the final specimen voided at the end of collection period.
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Transport Container
"Plastic urine container, no preservative
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Transport Temperature
"Refrigerate
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Specimen Stability
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Room temperature---14 days
Refrigerated---14 days
Frozen---3 days
Freeze/thaw cycles---Stable x3
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Room temperature---14 days
Refrigerated---14 days
Frozen---3 days
Freeze/thaw cycles---Stable x3
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Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
"Presence of acid preservative (pH <3); improper labeling
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Methodology
"Enzymatic "
Reference Range
"0-460 U/L
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Clinical Significance
"Work-up for abdominal pain, epigastric tenderness, nausea, and vomiting. An enzyme with molecular weight of 45 to 55 kilodaltons, urinary amylase is used in the differential diagnosis of pancreatitis. It is very useful in diagnosis of pseudocyst of the pancreas, where the urine amylase may remain elevated for weeks after the serum amylase has returned to normal, after a bout of acute pancreatitis.
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