Amylaseprtfldserpl
This test measures amylase levels in both peritoneal fluid and blood to help diagnose pancreatic disorders and determine the cause of abdominal fluid accumulation.
{"Amylase is a digestive enzyme produced by the pancreas and salivary glands","Elevated peritoneal fluid amylase often indicates pancreatic disease or damage","The test helps distinguish between different causes of ascites (abdominal fluid)","Normal serum amylase levels vary by laboratory, but typically range from 23-85 U/L","Results are compared between fluid and blood to determine if fluid is pancreatic in origin"}
Key facts at a glance
- LOINC
- 70262-1
- Short code
- Amylase.prt fld/SerPl
- Synonyms
- Amylase.prt fld/SerPl
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Critical range
- — – 500 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
What is this test?
The amylase test measures the level of amylase, a digestive enzyme that breaks down carbohydrates, in both your peritoneal (abdominal) fluid and blood serum. Amylase is primarily produced by the pancreas (pancreatic amylase) and salivary glands (salivary amylase). This combined test helps doctors evaluate pancreatic function and identify the source of abdominal fluid accumulation.
How is the test performed?
For serum amylase, a blood sample is drawn from a vein in your arm. For peritoneal fluid amylase, a procedure called paracentesis is performed, where a thin needle is inserted into the abdominal cavity to collect fluid. Both samples are then analyzed in a laboratory to measure amylase levels.
Why might I need this test?
Your doctor may order this test if you have symptoms of pancreatic problems such as severe abdominal pain, nausea, or vomiting, or if you have been diagnosed with ascites (fluid buildup in the abdomen). It helps determine whether the abdominal fluid is related to pancreatic disease, such as pancreatitis, pancreatic cancer, or pancreatic trauma.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Elevated amylase in peritoneal fluid, especially when significantly higher than serum levels, strongly suggests that the abdominal fluid is pancreatic in origin. This may indicate acute pancreatitis with pancreatic duct rupture, chronic pancreatitis with complications, pancreatic cancer, or pancreatic trauma. The ratio of peritoneal fluid to serum amylase helps differentiate between various causes of ascites. In acute pancreatitis, serum amylase typically rises within 2-12 hours of symptom onset and returns to normal within 3-5 days. Persistently elevated levels may suggest complications like pancreatic necrosis or pseudocyst formation.
Frequently asked questions
Do I need to fast before this test?
Are there any risks associated with this test?
How long does it take to get results?
What can cause false elevated amylase results?
Sources
- 1MedlinePlus - AmylaseSource
- 2
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy