Why it is necessary to remove dark coloured nail paint before surgery?

AIIMS Delhi NO- 2019

Medical & Surgical Nursing

Medium

Appeared in: AIIMS Delhi NO- 2019

Explanation

The primary reason for removing dark nail polish is its interference with vital sign monitoring during surgery.
Dark pigments in nail polish can block the light from a pulse oximeter, leading to inaccurate or absent blood oxygen saturation (SpO2) readings.
Nail polish obscures the nail bed, making it impossible to visually assess for cyanosis (a sign of low oxygen) or to measure Capillary Refill Time (CRT), a key indicator of peripheral circulation.

Option B: While some nail polishes may be flammable, the risk of burns from electrocautery is not the primary or most critical reason for its removal. Modern surgical practices have multiple safeguards against fire, and the interference with vital monitoring is a more immediate and certain problem.
Option C: While chipped nail polish can harbor bacteria and increase infection risk, this is a general hygiene concern, not the acute reason for removal just before surgery. The immediate priority during an operation is continuous, accurate monitoring of the patient's life-sustaining functions.
Option D: Following OT (Operating Theatre) ethics or protocols is the action, not the reason. The protocols and ethics exist because of underlying safety principles. This option explains what is done (following rules) but not why the rule exists.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Pre-operative patient preparation and safety as background academic context rather than a clinical decision trigger.
A nurse's role in pre-operative preparation includes educating the patient on why certain steps, like removing nail polish, are necessary for their safety.
Failure to obtain an accurate SpO2 reading can delay the recognition of hypoxia, potentially leading to severe complications, including organ damage or cardiac arrest.
Patient safety is paramount. Explaining the rationale behind policies improves patient compliance and reinforces the culture of safety.

How to Approach the Question

First, identify the core of the question: it asks for the medical or scientific reason ('Why') for a specific pre-operative instruction (removing dark nail polish).
Analyze each option for its clinical relevance and priority in a surgical setting. Think in terms of immediate life-threatening risks.
Option A deals with oxygenation and circulation (SpO2 and CRT), which are top priorities (think ABCs: Airway, Breathing, Circulation). Interference with monitoring these is a critical safety issue.
Options B (burns) and C (infection) are valid but less immediate or universal risks compared to the certainty of monitoring interference.
Option D (ethics/protocol) describes the adherence to a rule but fails to explain the reason for the rule itself.
Conclude that the most critical and direct reason is the interference with vital monitoring, making Option A the best answer.

Concept Tested & Keywords

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E6 Nursing Fundamentals Potter Perry 12e Part 6 p. 185-187