The drug used to prevent aspiration and decrease the secretions is?

AIIMS Rishikesh & Jodhpur NO - 2017

Pharmacology

Easy

Appeared in: AIIMS Rishikesh & Jodhpur NO - 2017

Explanation

Atropine is an anticholinergic (antimuscarinic) drug frequently used as a pre-anesthetic medication.
Its primary mechanism for this purpose is blocking acetylcholine at muscarinic receptors in exocrine glands, which significantly reduces salivary and bronchial secretions.
This reduction in airway secretions is critical to prevent them from being inhaled into the lungs (aspiration) during surgery when a patient's protective reflexes are suppressed by anesthesia.

Option B: Adrenaline (epinephrine) is a catecholamine used primarily for its potent effects in life-threatening situations like cardiac arrest and anaphylaxis. It does not primarily decrease secretions to prevent aspiration.
Option C: Norad (Norepinephrine) is a powerful vasopressor used to raise and maintain blood pressure in cases of severe, life-threatening hypotension, particularly in septic shock. It is not used to reduce secretions.
Option D: Dopamine is a catecholamine with dose-dependent effects, used to treat shock, low blood pressure, and symptomatic bradycardia. Its primary role is hemodynamic support, not reducing secretions.

Clinical Relevance

Nursing practice connection: Knowing Pharmacology of Pre-anesthetic Medications helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Nurses administering pre-operative atropine must monitor the patient for common side effects, including tachycardia (increased heart rate), dry mouth, blurred vision, and urinary retention.
A key nursing intervention is providing patient comfort through mouth care (e.g., offering sips of water if permitted, using moist swabs) to alleviate the discomfort of the severe dry mouth caused by atropine.
What if? If the patient has a history of narrow-angle glaucoma, atropine is generally contraindicated as it can dangerously increase intraocular pressure. The nurse must verify patient history and allergies before administration and notify the physician if such a contraindication exists.

How to Approach the Question

First, identify the core requirement of the question: a drug that 'prevents aspiration' by 'decreasing secretions'.
Recognize that the mechanism to prevent aspiration in this context is the reduction of secretions that could be inhaled.
Review the drug options and categorize them by their primary class and function.
Atropine is an anticholinergic, a class known for its 'drying' effects. Adrenaline, Norad, and Dopamine are catecholamines/sympathomimetics, primarily used for their cardiovascular effects.
Match the drug's primary mechanism to the question's requirement. Atropine's ability to decrease secretions directly addresses the question's goal.
Eliminate the other options as their primary functions (cardiac stimulation, vasopressor effects) do not align with the need to reduce secretions.

Concept Tested & Keywords

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