Amylaseisosfldimp

What is this test?

The amylase isoenzymes test measures different forms (isoenzymes) of the amylase enzyme in your blood or body fluid. Amylase is an enzyme that helps your body break down carbohydrates and starches into sugar. There are two main types: pancreatic amylase (P-type), produced by the pancreas, and salivary amylase (S-type), produced by salivary glands. This test helps determine which organ is producing excess amylase when levels are elevated.

Why is it ordered?

A standard amylase test shows if your amylase levels are elevated, but it cannot tell you where the excess is coming from. The isoenzyme test provides more specific information by measuring P-type and S-type amylase separately. This helps your doctor distinguish between pancreatic conditions (like pancreatitis or pancreatic cancer) and non-pancreatic causes (like salivary gland inflammation, kidney disease, or certain medications).

How is the test performed?

A healthcare professional will collect a blood sample from a vein in your arm. The sample is then sent to a laboratory where specialized testing separates and measures the different isoenzyme forms. Results are typically reported as a ratio (P-type to S-type) or as percentages of each type. Your doctor will interpret these results along with your symptoms and other test findings.

What do the results mean?

Elevated pancreatic amylase (P-type) suggests pancreatic involvement, such as acute pancreatitis, chronic pancreatitis, pancreatic duct obstruction, or pancreatic cancer. Elevated salivary amylase (S-type) may indicate salivary gland infection, inflammation, or blockage. However, results must be interpreted in context—some conditions can affect both types, and reference ranges may vary between laboratories.