CPT® Code 84485

1. Indications

Measurement of trypsin levels in duodenal fluid is indicated for the evaluation of pancreatic function in various clinical scenarios.

• Chronic Pancreatitis Severely reduced trypsin levels in duodenal fluid can indicate the presence of chronic pancreatitis, a condition characterized by long-term inflammation of the pancreas.
• Carcinoma of the Head of the Pancreas The presence of carcinoma in the head of the pancreas may also lead to significantly decreased trypsin levels, suggesting impaired pancreatic function.
• Diabetic Glucose Intolerance Less severely reduced trypsin levels may be observed in patients with diabetic glucose intolerance, indicating potential pancreatic dysfunction.
• Obstruction of the Common Bile Duct Obstruction in the common bile duct can also result in decreased trypsin levels, reflecting an underlying issue with pancreatic enzyme secretion.

2. Procedure

The procedure for measuring trypsin levels in duodenal fluid involves several key steps to ensure accurate results.

• Step 1: Sample Collection The first step involves the collection of duodenal fluid, which is typically obtained through a duodenal aspirate. This is performed by passing a tube through the nose or mouth into the stomach and then into the duodenum, allowing for the collection of the fluid that contains digestive enzymes, including trypsin.
• Step 2: Sample Preparation Once the duodenal fluid is collected, it must be properly prepared for analysis. This may involve centrifugation to separate the fluid from any particulate matter, ensuring that the sample is suitable for testing.
• Step 3: Trypsin Measurement The prepared sample is then subjected to a biochemical assay specifically designed to measure the concentration of trypsin. This assay may utilize various methods, such as immunoassays or enzymatic assays, to quantify the levels of trypsin present in the fluid.
• Step 4: Result Interpretation After the measurement is completed, the results are interpreted in the context of the patient's clinical condition. Significantly low levels of trypsin may indicate pancreatic insufficiency or other related disorders, while normal levels suggest adequate pancreatic function.

3. Post-Procedure

Post-procedure care primarily involves monitoring the patient for any potential complications related to the duodenal aspirate procedure, such as discomfort or bleeding. Patients may be advised to resume normal activities shortly after the procedure, as it is generally well-tolerated. The results of the trypsin measurement will be discussed with the patient in a follow-up appointment, where further diagnostic steps or treatment options may be considered based on the findings. It is essential for healthcare providers to ensure that patients understand the implications of their test results and any necessary follow-up actions.