Fractional Excretion of Amylase (Amylase to creatinine clearance ratio)

 

Input
 

Urine Amylase		u/L
Plasma Creat		g/dL gm/L gm/dL mcg/dL mg% mg/dL mg/mL ng/mL
Plasma Amylase		u/L
Urine Creat		g/dL gm/L gm/dL mcg/dL mg% mg/dL mg/mL ng/mL

 

Result
 

FE Amylase		% fraction ratio
Decimal Precision   0 1 2 3

 

 

Notes

• In this calculator, mcg is the abbreviation for micrograms.
• A fractional excretion of amylase greater than 5% may mean acute pancreatitis.
• Excretion less than 1% may mean macroamylasemia

 
Equations used
 

FEAmylase = 100 * (UrineAmylase * PlasmaCreat) / (PlasmaAmylase * UrineCreat)

 

 

References

1. Warshaw AL, Fuller AF Jr. Specificity of increased renal clearance of amylase in diagnosis of acute pancreatitis. N Engl J Med. 1975 Feb 13;292(7):325-8. PubMed ID: 1117961