During CPR in an adult, what ratio of Adrenaline dilution is used?

Appeared in: AIIMS Delhi NO - 2018

Explanation

The standard concentration of Adrenaline (Epinephrine) for intravenous (IV) or intraosseous (IO) administration during adult cardiac arrest is 1:10,000.
According to Advanced Cardiac Life Support (ACLS) guidelines, the dose is 1 mg of 1:10,000 solution repeated every 3-5 minutes.
This dilution (0.1 mg/mL) is specifically prepared for IV push to reduce the risk of severe cardiovascular side effects associated with more concentrated forms.
The goal is to increase systemic vascular resistance, blood pressure, and coronary and cerebral perfusion during CPR.

Option A: The 1:1,000 dilution (1 mg/mL) is ten times more concentrated and is not the standard for IV administration during CPR.
Option C: This is a very dilute solution and is not potent enough for systemic effects required during cardiac arrest.
Option D: A 1:100 dilution is extremely concentrated and is not used for parenteral administration in CPR. It would be highly toxic if given intravenously.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Pharmacology: Adrenaline (Epinephrine) Dilution in CPR as background academic context rather than a clinical decision trigger.
Medication safety is paramount during a high-stress event like a cardiac arrest. The nurse's role in the medication administration process includes a mandatory double-check of the drug, dose, and concentration.
Using the wrong adrenaline concentration can be fatal. Giving 1:1,000 IV instead of 1:10,000 can cause intractable ventricular fibrillation or a hypertensive crisis upon ROSC.
What if? If the patient were a child, the dilution for IV/IO administration would still be 1:10,000, but the dose would be weight-based (0.01 mg/kg).

How to Approach the Question

First, identify the core of the question: the correct adrenaline dilution for adult CPR.
Recognize that this is a factual recall question based on established resuscitation guidelines (ACLS).
Mentally review the different concentrations of adrenaline and their specific clinical applications.
Differentiate between the route and indication: IM for anaphylaxis (1:1,000) versus IV/IO for cardiac arrest (1:10,000).
Eliminate the highly dilute (1:100,000) and highly concentrated (1:100) options as they are not used for systemic resuscitation.
Select the option that matches the standard IV/IO concentration for cardiac arrest.

Concept Tested & Keywords

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E6 Medicine Davidson Principles Practice 24e pp. 478-480, 224-226

E6 Ghai Essential Pediatrics(pp 26-904 of 913) p. 124-126

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