A 6-month-old child is suffering from patent ductus arteriosus (PDA) with congestive cardiac failure. Ligation of ductus arteriosus was decided for surgical management. The most appropriate inhalational anesthetic agent of choice with minimal hemodynamic alteration fro induction of anesthesia is –

**Core Concept**
The question is testing the knowledge of anesthetic agents suitable for pediatric patients, particularly for inducing anesthesia in a child with a patent ductus arteriosus (PDA) and congestive cardiac failure. The key concept is to identify an anesthetic agent that minimizes hemodynamic alterations, which is crucial in managing patients with heart conditions.

**Why the Correct Answer is Right**
Sevoflurane is the preferred inhalational anesthetic agent for pediatric patients due to its favorable pharmacokinetic properties. It has a rapid onset of action, minimal irritation to the airways, and a smooth induction of anesthesia. Sevoflurane also causes minimal hemodynamic alterations, making it an ideal choice for patients with PDA and congestive cardiac failure. This is because sevoflurane does not significantly depress myocardial contractility or cardiac output, unlike some other inhalational anesthetics.

**Why Each Wrong Option is Incorrect**
* **Option A:** Halothane is an older inhalational anesthetic agent that can cause significant myocardial depression and cardiac output reduction, making it less suitable for patients with PDA and congestive cardiac failure.
* **Option B:** Isoflurane can cause vasodilation and reduce systemic vascular resistance, which may worsen cardiac failure in patients with PDA.
* **Option C:** Desflurane can cause airway irritation and coughing, making it less ideal for induction of anesthesia in pediatric patients.

**Clinical Pearl / High-Yield Fact**
Sevoflurane is a good choice for pediatric anesthesia induction because it has a sweet, non-irritating smell, making it easier to administer to young children.

**Correct Answer:** C. Desflurane

✓ Correct Answer: B. Sevoflurane