A patient is suspected to have hepatitis, which diagnostic test will confirm the diagnosis?

BCCL kharkhanda Staff Nurse - 2015

Medical & Surgical Nursing

Medium

Appeared in: BCCL kharkhanda Staff Nurse - 2015

Explanation

Hepatitis is inflammation of the liver, which disrupts its normal functions.
A key function of the liver is to process and excrete bilirubin, a byproduct of red blood cell breakdown.
In hepatitis, damaged liver cells (hepatocytes) cannot effectively process bilirubin, causing it to build up in the blood.
This buildup, known as hyperbilirubinemia, is a direct and primary indicator of liver dysfunction and is used to confirm a diagnosis of hepatitis.
Clinically, elevated bilirubin manifests as jaundice (yellowing of the skin and eyes).

Option A: Elevated hemoglobin (polycythemia) is not associated with hepatitis. Hepatitis does not cause an increase in red blood cell production.
Option C: Blood Urea Nitrogen (BUN) is a primary marker for kidney function and hydration status, not liver inflammation.
Option D: The Erythrocyte Sedimentation Rate (ESR) is a non-specific marker of inflammation. In an inflammatory condition like hepatitis, the ESR would be elevated, not decreased.

Clinical Relevance

Nursing practice connection: Use the key finding related to Laboratory diagnosis of hepatitis to guide bedside assessment, documentation, and the next nursing action.
Nurses play a vital role in monitoring patients with hepatitis for signs of worsening liver function, primarily by observing for jaundice, dark urine, and light-colored stools, all of which indicate high bilirubin levels.
Patient education is critical. Nurses should instruct patients on the importance of follow-up liver function tests (LFTs), avoiding alcohol, and managing medications to prevent further liver damage.
What if? If the patient's lab results also showed a significantly prolonged prothrombin time (PT), it would indicate impaired synthesis of clotting factors, a sign of severe, potentially life-threatening liver failure requiring urgent intervention.

How to Approach the Question

First, identify the core condition in the question stem: 'hepatitis'.
Recall the pathophysiology of hepatitis, which is inflammation and damage to the liver cells.
Consider how liver damage affects its primary functions. A key function is the metabolism of bilirubin.
Evaluate each option to determine which lab value directly reflects impaired liver function due to hepatitis.
Eliminate options related to other body systems (kidneys - BUN) or non-specific/incorrect inflammatory responses (decreased ESR).
Select the option that is a direct consequence of hepatocellular injury, which is the inability to process bilirubin, leading to its elevation in the serum.

Concept Tested & Keywords

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E6 Physiology Guyton 4SAE Part 2A p. 186-188

E6 textbook of Applied Biochemistry and Nutrition & DieteticsHarbans Lal (pp 26-464 of 479) p. 166-168