All of the following are diagnostic tests, except?

Appeared in: SGPGI Nursing Officer-2022

Explanation

Tubectomy is a surgical procedure for female sterilization, also known as tubal ligation.
Its purpose is to provide permanent contraception by preventing the egg from reaching the uterus for fertilization.
Unlike diagnostic tests that aim to identify a health condition, tubectomy is a planned surgical intervention to prevent a future state (pregnancy).
Therefore, it is classified as a surgical/prophylactic procedure, not a diagnostic one.

Option A: A Pap smear (or Pap test) is a classic example of a diagnostic screening test.
Option B: The Schick test is a diagnostic tool used to determine an individual's susceptibility to diphtheria.
Option D: An Arterial Blood Gas (ABG) test is a crucial diagnostic blood test.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Differentiation between diagnostic tests and surgical/therapeutic procedures as background academic context rather than a clinical decision trigger.
A nurse must be able to clearly explain the purpose of any procedure to a patient to ensure informed consent. Confusing a surgical procedure like tubectomy with a simple diagnostic test would be a serious communication error.
Patient education is a core nursing responsibility. For tubectomy, this includes counseling on its permanence, risks, benefits, and alternatives. For diagnostic tests, it involves explaining the procedure, what it tests for, and any necessary preparation.
What if? If a patient consented to a 'test' for contraception and underwent a tubectomy without understanding its permanence, it would be a major ethical and legal issue. This highlights the critical importance of precise communication.

How to Approach the Question

First, identify the keyword 'except' in the question stem. This means you are looking for the option that does not belong to the group.
The group is defined as 'diagnostic tests'. Define this term: a test performed to help in the diagnosis or detection of disease.
Evaluate each option against this definition.
Pap smear: A test to detect cervical cancer. This is diagnostic.
Schick test: A test to determine susceptibility to diphtheria. This is diagnostic.
Tubectomy: A surgical procedure to prevent pregnancy. This is a permanent contraceptive method, not a test to diagnose a condition.

Concept Tested & Keywords

Concept Tested: Differentiation between diagnostic tests and surgical/therapeutic procedures.
Stem keywords: diagnostic tests
Lead-in keywords: except
Negative lead-in flag: Question asks for the exception.

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E6 Nursing Fundamentals Taylor p. 684-686

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