A nurse is caring for a client with severe asthma who is experiencing an acute exacerbation. The client's peak expiratory flow rate (PEFR) is 30% of personal best, oxygen saturation is 85% on room air, and the client is using accessory muscles to breathe. Which nursing intervention should the nurse implement first?

In severe asthma exacerbation, assessment (breath sounds, respiratory pattern) must come first to establish baseline data and guide safe interventions like albuterol, oxygen, or positioning. Other options are appropriate but require prior assessment.

Clinical Reasoning and Prioritization

This question tests your ability to prioritize nursing interventions for a client in acute respiratory distress using the nursing process. The scenario presents a client with severe asthma exacerbation exhibiting signs of impending respiratory failure: a PEFR of 30% of personal best, oxygen saturation of 85% on room air, and accessory muscle use.

The correct first action is to assess the client's breath sounds and respiratory pattern. In the nursing process, assessment always precedes implementation unless a life-threatening condition requires an immediate, protocol-driven intervention without a focused assessment. While this client is in severe distress, the nurse must first perform a rapid, focused respiratory assessment to gather essential data that will guide and validate all subsequent interventions. You cannot effectively evaluate the outcomes of positioning, oxygen delivery, or bronchodilator therapy without establishing a clear baseline of lung sounds and breathing effort. Administering a bronchodilator, applying oxygen, or repositioning are all implementation-phase actions that depend on the data obtained from this initial assessment.

The provided evidence explores the comparison of high-flow nasal cannula (HFNC) oxygen therapy with conventional oxygen therapy for asthma exacerbations ^[1]. While this research focuses on a specific oxygen delivery modality, it underscores a critical clinical principle: the management of acute asthma is centered on correcting hypoxemia and reducing work of breathing. The severely diminished PEFR (30%) indicates profound bronchoconstriction and airflow obstruction, which leads to the critical hypoxemia (85%) and the recruitment of accessory muscles. Before deciding on the specific oxygen delivery system—whether a simple nasal cannula, a non-rebreather mask, or an HFNC system—the nurse must first conduct a thorough assessment. This assessment, including auscultation for wheezing, diminished breath sounds, or a "silent chest," directly informs the urgency and type of intervention. For instance, a finding of a silent chest would indicate a far more critical, pre-arrest situation than diffuse expiratory wheezing, potentially altering the sequence and speed of subsequent actions. The assessment is the foundational step that ensures the chosen intervention, such as applying oxygen as explored in the context of HFNC versus conventional therapy, is appropriately targeted and its effects can be accurately monitored ^[1].