# A 9-month-old infant with respiratory syncytial virus (RSV) bronchiolitis is admitted to the pediatric unit. The infant has increased work of breathing, nasal flaring, and subcostal retractions. Which nursing intervention should be the highest priority?

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## 문제

A 9-month-old infant with respiratory syncytial virus (RSV) bronchiolitis is admitted to the pediatric unit. The infant has increased work of breathing, nasal flaring, and subcostal retractions. Which nursing intervention should be the highest priority?

## 보기

1. Administer bronchodilators as prescribed to improve airway patency
2. Provide chest physiotherapy to mobilize secretions
3. Encourage frequent oral fluid intake to prevent dehydration
4. Position the infant in semi-Fowler's position to optimize breathing **✔ 정답**

**정답: 4**

## 해설

Positioning in semi-Fowler's is the highest priority to optimize breathing and reduce work of breathing in an infant with RSV bronchiolitis showing respiratory distress. Other interventions are less immediate or potentially harmful in acute distress.

## 심화 해설

Clinical Context & Pathophysiology

In respiratory syncytial virus (RSV) bronchiolitis, the virus invades the epithelial cells of the small airways (bronchioles), causing necrosis, edema, and increased mucus production. In a 9-month-old infant, this leads to airway obstruction, hyperinflation, and atelectasis. The clinical signs described—increased work of breathing, nasal flaring, and subcostal retractions—are compensatory mechanisms indicating significant respiratory distress. The infant is using accessory muscles and physiologic maneuvers to generate greater negative intrathoracic pressure in an attempt to overcome the narrowed, obstructed airways. The immediate priority is to reduce this work of breathing by optimizing mechanical advantage, not by introducing interventions that may cause further distress or have limited evidence of benefit.

Analysis of the Highest Priority Intervention

The correct answer is to position the infant in semi-Fowler's position. This is a foundational, non-invasive nursing intervention that directly addresses the primary problem of increased work of breathing. Placing an infant in a semi-upright position (head of bed elevated approximately 30-45 degrees) uses gravity to lower the diaphragm and reduce pressure from abdominal contents on the thoracic cavity. This optimizes lung expansion and improves ventilation-perfusion matching without causing agitation or discomfort. The Australasian Bronchiolitis Guideline emphasizes supportive care, including positioning, as a cornerstone of management, while explicitly recommending against therapies that lack strong evidence or may cause harm [1].

Why Other Options Are Not the Priority

1.  Administer bronchodilators: The Australasian guideline does not recommend the routine use of bronchodilators like salbutamol in infants with bronchiolitis. The pathophysiology involves airway plugging from edema and debris, not primarily bronchospasm as in asthma. Administering a bronchodilator can cause tachycardia and increased oxygen consumption, potentially worsening the infant's distress without providing clinical benefit [1].

2.  Provide chest physiotherapy: The guideline recommends against chest physiotherapy in infants with bronchiolitis who do not have a pre-existing condition like cystic fibrosis. Techniques such as percussion and vibration can agitate the infant, increase respiratory effort, and have not been shown to improve clinical outcomes or shorten hospital stay [1].

3.  Encourage frequent oral fluid intake: While maintaining hydration is an important aspect of care, it is not the immediate priority for an infant in acute respiratory distress. An infant with significant tachypnea, nasal flaring, and retractions is at high risk for aspiration and has an unsafe swallow due to a high respiratory rate. Oral feeding in this state can further compromise the airway. The priority is to stabilize the airway and breathing first; hydration is typically managed with nasogastric or intravenous fluids if the work of breathing is severe, a nuance reflected in supportive care guidelines [1].

The core principle from the evidence-based guideline is that bronchiolitis management is primarily supportive, focusing on minimal handling and interventions that reduce, rather than increase, the infant's work of breathing [1, 2]. Positioning is the least invasive, safest, and most immediately effective nursing action to achieve this goal.References (research sources)

- [1]Australasian Bronchiolitis Guideline: 2025 Update.GuidelineBorland ML, Loveys K, Babl FE, Cotterell E, Haskell L, O'Brien S, Oakley E, Wilson CL, Alsweiler J, Armstrong D, Craig SS, Crawford NW, Crellin D, Crone S, Duke T, George S, Jeffries-Stokes C, Krishnan N, Lithgow A, Peacock K, Ratoni T, Richmond P, Smith A, Starkie R, Thomas D, Wallace A, Zhang M, Tavender E, Dalziel SR, Paediatric Research in Emergency Departments International Collaborative (PREDICT) Network, Australasia. (2025) · DOI: 10.1111/jpc.70144

## 임상 시나리오

Positioning for Pediatric Respiratory DistressImmediate Non-Invasive Airway Support
In infants with RSV bronchiolitis showing subcostal retractions and nasal flaring, the priority is to reduce work of breathing. Place the infant in Semi-Fowler's position (head elevated 30-45 degrees). This uses gravity to lower the diaphragm and improve lung expansion without causing agitation.

Supportive care is the cornerstone of management. Avoid interventions that may increase distress, such as unnecessary suctioning or chest physiotherapy. Maintain a calm environment and cluster care to minimize oxygen consumption.

CautionDo not force oral fluids in an infant with significant tachypnea and retractions. The increased respiratory rate raises the risk of aspiration. Ensure airway patency and positioning are optimized first, then consider small, frequent feeds or IV fluids if dehydration is a concern.

## 핵심 개념

- **Semi-Fowler's Position** — A position where the head of the bed is elevated 30-45 degrees to reduce diaphragmatic pressure and optimize lung expansion.
- **Subcostal Retractions** — Inward pulling of the abdomen just below the rib cage during inspiration, indicating severe respiratory distress.
- **RSV Bronchiolitis** — A lower respiratory tract infection caused by respiratory syncytial virus, leading to bronchiolar inflammation, edema, and airway obstruction in infants.

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