Lung surfactant in a preterm neonate is administered via which route?

NORCET 10 Mains

Child Health Nursing (Pediatrics)

Easy

Appeared in: NORCET 10 Mains

Explanation

The correct route for administering lung surfactant is intratracheal, directly into the trachea (windpipe).
This route ensures the medication reaches its site of action—the alveoli—to exert its local effect.
Surfactant works by reducing surface tension within the alveoli, preventing their collapse during expiration, which is crucial for treating Respiratory Distress Syndrome (RDS) in preterm infants.
Administration is typically done through an endotracheal tube or via less invasive methods like a thin catheter (LISA technique).

Option A: The intravenous (IV) route delivers medication into the bloodstream for systemic circulation. Surfactant administered this way would be diluted, metabolized, and would not reach the alveolar surface where it needs to act.
Option B: The intramuscular (IM) route is used for systemic absorption of medications from the muscle tissue. It does not provide direct access to the lungs for local treatment.
Option D: The subcutaneous (SC) route involves injecting medication into the fatty tissue under the skin for slow, sustained systemic absorption. This is not suitable for delivering surfactant to the lungs.

Visual 1: Diagram - An illustration showing the placement of an endotracheal tube in a neonate's trachea for surfactant administration. This helps visualize the direct pathway to the lungs.
Visual 2: Animation - A short animation depicting how surfactant molecules reduce surface tension within an alveolus, preventing it from collapsing during exhalation.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Pharmacology and Medication Administration in Neonates as background academic context rather than a clinical decision trigger.
Surfactant administration is a life-saving intervention for preterm neonates with Respiratory Distress Syndrome (RDS).
Nurses play a critical role in preparing the medication, assisting with the administration procedure, and closely monitoring the neonate's vital signs (heart rate, oxygen saturation, respiratory effort) before, during, and after the procedure.
Potential adverse effects during administration include transient bradycardia, oxygen desaturation, and airway obstruction. The nurse must be prepared to intervene immediately.

How to Approach the Question

First, identify the core of the question: the administration route for lung surfactant.
Recall the function of lung surfactant: it acts locally on the surface of the alveoli to reduce surface tension.
Consider the principle of medication administration: for a local effect, the drug should be delivered as directly as possible to the target site.
Evaluate the options based on this principle. IV, IM, and SC are systemic routes, meaning the drug enters the bloodstream to be distributed throughout the body.
The intratracheal route is the only option that delivers the medication directly into the airways and lungs.
Conclude that the intratracheal route is the correct choice for achieving a local effect in the alveoli.

Concept Tested & Keywords

Concept Tested: Pharmacology and Medication Administration in Neonates
Stem keywords: Lung surfactant, preterm neonate, administered, route
Lead-in keywords: via which route
Clinical cues: Preterm neonate, indicating potential for underdeveloped lungs and surfactant deficiency.

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