AIIMS Raipur NO - 201…: The substances that cause tissue necrosis and damage, particularly when extravasated, are?

AIIMS Raipur NO - 2017 (Shift-1)

Pharmacology

Easy

Appeared in: AIIMS Raipur NO - 2017 (Shift-1)

Explanation

Vesicants are chemical agents that cause severe tissue damage, blistering, and necrosis if they leak from a vein into the surrounding tissue (extravasation).
This definition directly matches the description in the question, which asks for substances causing tissue necrosis when extravasated.
Common examples of vesicants include certain chemotherapy drugs (e.g., doxorubicin, vincristine), vasopressors, and high-concentration electrolyte solutions.

Option A: Apoptosis is a natural, programmed process of cell death, essential for normal tissue turnover. It is a biological process, not an external substance that causes injury upon leakage.
Option B: Interleukins are a type of cytokine, which are signaling proteins used by the immune system to regulate inflammatory responses. While they are involved in inflammation, they do not directly cause tissue necrosis upon extravasation.
Option D: Retinoids are a class of compounds derived from vitamin A, used primarily in dermatology. While they can cause skin irritation when applied topically, they are not classified as vesicants that cause severe tissue necrosis on extravasation from an IV line.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Definition and management of vesicant extravasation as background academic context rather than a clinical decision trigger.
Recognizing a drug as a vesicant is a critical patient safety competency for nurses, ensuring proper IV administration techniques, including site selection (e.g., a large vein, avoiding joints) and vigilant monitoring.
Immediate intervention for extravasation is a nursing priority to prevent progression to severe necrosis, which may require surgical debridement, skin grafting, or result in permanent loss of function.
What if? If the extravasated drug was an 'irritant' instead of a 'vesicant', the nurse would still stop the infusion, but the resulting injury would likely be limited to inflammation and pain without the severe tissue death. Management would focus on comfort and reducing inflammation rather than antidote administration.

How to Approach the Question

First, analyze the question to identify the key concepts: 'substances,' 'tissue necrosis,' and 'extravasated.'
This is a definition-based question. The goal is to find the term that matches the description of a substance causing tissue death when it leaks from a blood vessel.
Evaluate each option against this definition.
Recall or deduce that 'vesicant' is the specific medical term for a substance that causes blistering and tissue death upon extravasation.
Eliminate the other options by defining them: Apoptosis is a process, not a substance. Interleukins are immune proteins. Retinoids are a different class of drugs not known for this specific severe effect.

Concept Tested & Keywords

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