The hourly rate of urinary amylase excretion, serum amylase, and serum lipase. I. In control subjects and patients with renal disease.

The rates of urinary amylase excretion/hour and the levels of serum amylase and lipase were measured in 190 normal subjects and patients with no evidence of renal or gastrointestinal disorder. The hourly rate of urinary amylase excretion/hour was found to have an upper limit of normal of 69 IU. The upper limit of normal for the serum amylase was 251 IU/litre and for the serum lipase 1.6 units/ml. Raised levels of serum amylase and lipase with a normal rate of urinary amylase excretion/hour were found in chronic renal failure.