# A client with a history of asthma presents to the emergency department with an acute exacerbation. Review the trend of assessments and interventions, then answer the questions.

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> language: en  
> subject: Medical Emergencies  
> category: PA

## Question

A client with a history of asthma presents to the emergency department with an acute exacerbation. Review the trend of assessments and interventions, then answer the questions.

| Time | Data |
| --- | --- |
| 08:00 | respiratory rate: 24/min; spo2: 93%; breath sounds: Audible expiratory wheezing; peak flow: 220 L/min; work of breathing: Mild intercostal retractions; mental status: Alert, full sentences |
| 08:30 | respiratory rate: 28/min; spo2: 91%; breath sounds: Wheezing louder, prolonged expiration; peak flow: 200 L/min; work of breathing: Moderate intercostal and suprasternal retractions; mental status: Alert, phrases |
| 09:00 | respiratory rate: 32/min; spo2: 89%; breath sounds: Very quiet breath sounds, no wheezing; peak flow: 180 L/min; work of breathing: Severe retractions, paradoxical abdominal movement; mental status: Drowsy, single words |
| 09:30 | respiratory rate: 36/min; spo2: 86%; breath sounds: Absent breath sounds; peak flow: 160 L/min; work of breathing: Severe retractions, accessory muscle use; mental status: Lethargic, minimal response |

Q1. What is the most accurate interpretation of the client's trend?

The client's condition reflects expected medication effects with no need for concern.
The client is experiencing anxiety, which is causing the increased respiratory rate and decreased SpO2.
The client is developing respiratory failure and requires immediate escalation of care.
The client is improving because wheezing has resolved and peak flow is stable.

Q2. Which intervention should the nurse anticipate next?

Send the client home with instructions to continue inhalers.
Encourage the client to rest and sleep to reduce oxygen demand.
Administer another dose of albuterol and reassess in 30 minutes.
Prepare for noninvasive positive pressure ventilation or intubation.

Q3. Which finding is the most concerning indicator of impending respiratory arrest?

SpO2 of 86%
Peak flow of 160 L/min
Respiratory rate of 36/min
Absent breath sounds with lethargy

## Explanation

The trend shows progressive respiratory failure: rising respiratory rate, falling SpO2, decreasing peak flow, increasing work of breathing, and deteriorating mental status. The disappearance of wheezing with quiet breath sounds is a critical sign of severe airflow limitation and fatigue, not improvement.

## In-depth explanation

Quick answer
The client is developing respiratory failure and requires immediate escalation of care.

Why this is correct
The trend demonstrates worsening airflow obstruction and fatigue: respiratory rate increases from 24 to 36/min, SpO2 falls from 93% to 86%, peak flow declines from 220 to 160 L/min, work of breathing worsens with severe retractions and accessory muscle use, and mental status deteriorates from alert to lethargic. The transition from wheezing to absent breath sounds indicates a 'silent chest' due to severe airflow limitation, not resolution of bronchospasm.

Clinical picture
In acute asthma, a silent chest with decreasing SpO2 and altered mental status is a pre-arrest sign requiring immediate escalation, including preparation for advanced airway management and consideration of noninvasive or invasive ventilation.

Memory hook
Remember the 'silent chest' paradox: wheezing may disappear as airflow becomes too poor to generate sound. Always correlate breath sounds with oxygenation, work of breathing, and mental status.

NCLEX decision rule
GINA guidelines recommend urgent escalation for any of: SpO2 <90%, inability to speak in sentences, drowsiness, silent chest, or peak flow <50% of personal best that does not improve after initial bronchodilator therapy.

Why the alternatives are wrong
The client's condition is not improving; the quiet chest is not a positive sign. Anxiety alone does not explain the objective deterioration in oxygenation and peak flow. Sending the client home or withholding oxygen would be unsafe given the impending respiratory failure.

Sources
1NCSBN 2026 NCLEX-RN Test Plan
2GINA 2026 Strategy Report

## Clinical scenario

The client is a 28-year-old with a 10-year history of moderate persistent asthma. Initial assessment: respiratory rate 24/min, SpO2 93% on room air, audible expiratory wheezing, peak flow 220 L/min (personal best 500 L/min), mild intercostal retractions, alert and speaking in full sentences. Interventions: albuterol 5 mg nebulized every 20 minutes x 3 doses, ipratropium 0.5 mg nebulized once, oral prednisone 60 mg, oxygen 2 L/min via nasal cannula.

## Key concepts

- **Silent chest** — A severe asthma sign where airflow is so limited that wheezing is absent; indicates impending respiratory failure.
- **Peak flow** — A measure of maximum expiratory flow used to assess asthma severity; values below 50% of personal best indicate severe exacerbation.
- **Accessory muscle use** — Recruitment of neck and chest muscles to assist breathing, indicating increased work of breathing and respiratory distress.

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