Amylase Isoenzymes with Reflex to Macroamylase
Use
Amylase is produced primarily by the pancreas and salivary glands. Measuring isoenzymes—pancreatic and salivary—can help determine the source of an elevated amylase. Macroamylase refers to amylase complexes with immunoglobulins or other high–molecular‑weight proteins, leading to falsely elevated serum amylase; macroamylasemia is a laboratory finding without associated clinical symptoms.
Special Instructions
If Amylase Isoenzymes are >115 U/L, then Macroamylase will be performed at additional charge.
Limitations
Oxalate, citrate, and lipemic sera can decrease results.
New York Approved
Methodology
Other
Biomarkers
LOINC Codes
- 1798‑8
- 1805‑1
- 1809‑3
- 15358‑5
Result Turnaround Time
Not provided.
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
2 mL
Minimum Volume
1 mL
Container
Serum (plain red‑top tube or serum separator tube)
Collection Instructions
Centrifuge, separate serum and send refrigerated (cold packs)
Causes for Rejection
Gross hemolysis
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | Unacceptable |
| Refrigerated | 7 days |
| Frozen | 21 days |