Which one of the following serum enzymes is used in clinical diagnosis of acute pancreatitis?

Appeared in: ESIC Nursing Officer-7July 2024

Explanation

Amylase is a digestive enzyme produced by the pancreas and salivary glands.
In acute pancreatitis, inflammation and damage to pancreatic cells cause a massive release of amylase into the bloodstream.
Serum amylase levels rise rapidly (within 5-12 hours) after the onset of pancreatitis, making it a valuable early diagnostic marker.
A level greater than three times the upper limit of normal is highly indicative of acute pancreatitis when accompanied by clinical symptoms.

Option A: Lactate dehydrogenase (LDH) is a non-specific marker of tissue damage and is found in many organs (heart, liver, kidneys, muscle). Its elevation is not specific to pancreatic injury.
Option B: Alanine aminotransferase (ALT) is an enzyme primarily found in the liver. It is a specific marker for hepatocellular (liver cell) injury.
Option C: Aspartate aminotransferase (AST) is found in the liver, heart, skeletal muscle, and other tissues. Like LDH, it is not specific to the pancreas.

Visual 1: Chart: A graph comparing the serum concentration curves of amylase and lipase over time following the onset of acute pancreatitis. This visual helps illustrate why lipase is more useful for late diagnosis.

Clinical Relevance

Nursing practice connection: Use the key finding related to Biochemical markers for acute pancreatitis diagnosis to guide bedside assessment, documentation, and the next nursing action.
Nurses play a key role in ensuring timely blood sample collection for patients presenting with acute abdominal pain to get an accurate amylase reading.
It is crucial to interpret enzyme levels in the context of when the symptoms began. A normal amylase level in a patient who has had pain for 5-6 days does not rule out pancreatitis.
Understanding the difference between amylase and lipase helps the nurse anticipate which tests might be ordered and educate the patient and family about the results.

How to Approach the Question

First, identify the core clinical condition in the question stem, which is 'acute pancreatitis'.
Next, access your knowledge base about the diagnostic workup for this condition. Recall the primary biochemical markers used.
The two key enzymes for diagnosing acute pancreatitis are serum amylase and serum lipase.
Scan the given options to see if either of these primary markers is listed.
Option D, 'Amylase', is present. This is a strong candidate for the correct answer.
Briefly consider the other options to confirm they are incorrect. LDH is a general marker of tissue damage, while ALT and AST are primarily liver enzymes. This confirms that Amylase is the most appropriate answer among the choices.

Concept Tested & Keywords

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Practise the full ESIC Nursing Officer-7July 2024

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