Which of the following pancreatic function test can be useful for estimation of bicarbonate as well as enzyme secretory activity of pancreas?
**Core Concept**
The pancreas plays a crucial role in digestion by secreting enzymes and bicarbonate into the small intestine. Assessing pancreatic function is essential in diagnosing pancreatic disorders. Various tests can evaluate enzyme secretory activity and bicarbonate secretion.
**Why the Correct Answer is Right**
The secretin stimulation test is a useful pancreatic function test that can estimate both bicarbonate and enzyme secretory activity. During this test, secretin is administered, which stimulates the pancreas to secrete bicarbonate-rich fluid. The bicarbonate secretion is measured through duodenal aspiration, and the enzyme secretory activity is assessed by measuring the enzyme levels in the aspirate. This test is particularly useful in evaluating the function of the pancreatic parenchyma.
**Why Each Wrong Option is Incorrect**
* **Option A:** The Lundh test is a useful test for evaluating pancreatic enzyme secretory activity but does not directly measure bicarbonate secretion.
* **Option B:** The pancreolauryl test is a test for pancreatic enzyme secretory activity but does not measure bicarbonate secretion.
* **Option D:** The faecal fat test is a useful test for diagnosing pancreatic exocrine insufficiency but does not directly measure bicarbonate or enzyme secretory activity.
**Clinical Pearl / High-Yield Fact**
The secretin stimulation test is a sensitive test for evaluating pancreatic function, especially in patients with chronic pancreatitis or pancreatic cancer.
**Correct Answer:** C.