The laboratory test used for the diagnosis of autoimmune arthritis is the test. - UPUMS Nsg officer-2023

UPUMS Nsg officer-2023

Medical & Surgical Nursing

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Appeared in: UPUMS Nsg officer-2023

Explanation

The Antinuclear Antibody (ANA) test is a serological assay designed to detect autoantibodies that target components within a cell's nucleus.
These autoantibodies are a key feature of systemic autoimmune disorders, where the immune system loses tolerance and attacks its own cells.
A positive ANA test is a significant finding in the diagnostic workup for various types of autoimmune arthritis, including Systemic Lupus Erythematosus (SLE), Rheumatoid Arthritis (RA), and Juvenile Idiopathic Arthritis (JIA).
While not perfectly specific (it can be positive in other conditions or even healthy individuals), it is a highly sensitive screening test; a negative result makes a diagnosis of SLE very unlikely.

Option A: The Bence Jones protein test is performed on urine to detect monoclonal light chains, which are markers for plasma cell disorders.
Option C: Alkaline phosphatase (ALP) is an enzyme primarily associated with the liver and bones. Its levels are measured to assess for liver disease or bone disorders.
Option D: An X-ray is a radiological imaging study, not a laboratory test. Laboratory tests analyze samples of blood, urine, or tissue.

Clinical Relevance

Nursing practice connection: Use the key finding related to Laboratory diagnosis of autoimmune arthritis to guide bedside assessment, documentation, and the next nursing action.
Nurses play a crucial role in educating patients about the purpose of the ANA test, ensuring they understand that it is a screening tool and not a definitive diagnosis on its own.
Proper sample collection and handling are essential for accurate results. The nurse must ensure the blood sample is collected correctly and sent to the lab promptly.
When reviewing lab results, the nurse must correlate a positive ANA with the patient's clinical presentation (e.g., joint pain, rash, fatigue) and report significant findings to the healthcare provider.

How to Approach the Question

First, identify the key terms in the question: 'laboratory test' and 'autoimmune arthritis'. This directs you to look for a blood or urine test used to identify an autoimmune process affecting the joints.
Next, evaluate each option based on this requirement.
Eliminate 'X-ray' immediately, as it is an imaging modality, not a laboratory test.
Consider the remaining lab tests. Recall or deduce the primary use for each.
Recognize that 'Bence Jones protein' is a specific marker for multiple myeloma (a cancer) and 'Alkaline phosphatase' is primarily for liver and bone disorders.
This leaves 'Antinuclear antibody', which is a well-known serological marker for systemic autoimmune diseases. Connect this test to the diagnosis of conditions like lupus and rheumatoid arthritis, which are forms of autoimmune arthritis.

Concept Tested & Keywords

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