Fluid Amylase
- Sample Type
- Standard
- Fasting
- No
- Unit
- U/L
This test measures the concentration of the enzyme amylase in body fluids other than blood (e.g., pleural fluid, ascitic fluid). In pleural fluid, elevated amylase is highly suggestive of acute pancreatitis, esophageal rupture, or malignancy. In ascitic fluid (peritoneal fluid), high levels are typically indicative of pancreatic injury, such as acute pancreatitis or a pancreatic pseudocyst. Comparing fluid amylase to serum amylase levels is a critical diagnostic step in identifying the source of an effusion.
Check Your Result
Check Your Result
Enter your lab result to see where you stand compared to the standard reference range.
Why Context Matters
Levels can vary significantly depending on the time of collection relative to the onset of the acute event. Furthermore, different isoforms (salivary vs. pancreatic) can confuse the diagnosis if the source of the effusion is not purely pancreatic.
Lab ranges are statistical averages, not biological laws. "Normal" for a 20-year-old male isn't normal for a 60-year-old female.
Clinical References
Source-of-truth databases and clinical guidelines for Fluid Amylase:
Official Sources
- American College of Gastroenterology Guidelines: Management of Acute Pancreatitis - PubMedpubmed.ncbi.nlm.nih.gov
Research & Guidelines
- PubMed: Fluid Amylase Clinical GuidelinesNCBI / PubMed
Related Indicators
Medically Reviewed by Dr. Binoy Babu, MBBS
Board Certified Doctor • 10+ Years Clinical Experience
Dr. Babu is a practicing physician dedicated to empowering patients with clear, actionable medical information. He founded 2opi to bridge the gap between complex lab reports and patient understanding, ensuring everyone has access to a reliable second opinion.
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