What Factors Affect the Levels of Amylase in Urine?

Amylase mainly comes from the pancreas, called pancreatic amylase. Followed by salivary glands, called salivary amylase. If the pancreas has inflammatory lesions or the drainage of pancreatic juice is blocked, pancreatic amylase can escape from the pancreatic duct wall and pancreatic vesicles, absorbed into the blood and excreted with the urine, so the blood and urinary amylase content are both increased, so Often measured with blood amylase. During the onset of acute pancreatitis, patients' amylase activity was significantly increased in serum and urine. But the urinary amylase activity rose slightly later than the serum amylase, and lasted a little longer. It usually starts to rise 12 to 24 hours after the onset of the disease, but it declines slowly and can be maintained for 5 to 7 days. The reference value of normal urine amylase is 100 1200U by iodine-starch colorimetry. Therefore, the determination of urinary amylase is more valuable than serum amylase in the later stage of acute pancreatitis.