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Peak Expiratory Flow Rate (PEFR) Assessment Quiz

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Peak Expiratory Flow Rate (PEFR) Assessment Quiz

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Questions and Answers

What is the purpose of measuring the peak expiratory flow rate (PEFR) in patients with acute asthma?

To assess the severity of life-threatening asthma

To measure pulse oximetry

To use as a triage tool for immediate assessment (correct)

To determine the heart rate

In a moderate exacerbation of asthma, what percentage range of peak flow indicates this level of severity?

75-100% best or predicted

25-50% best or predicted

Above 100% best or predicted

50-75% best or predicted (correct)

Which vital sign indicates acute severe asthma in a patient?

Peak flow above 50% best or predicted

Ability to complete sentences in one breath

Respiratory rate (RR) less than 25/min (correct)

Heart rate below 110/min

What feature distinguishes life-threatening asthma from acute severe asthma?

<p>Peak flow between 33-50% best or predicted</p> Signup and view all the answers

Which of the following indicates a patient with life-threatening asthma?

<p>Peak flow below 33% best or predicted</p> Signup and view all the answers

Study Notes

Assessing Acute Asthma

Measure Peak Expiratory Flow Rate (PEFR) and compare it to the expected value.
PEFR serves as an immediate triage tool, except for patients with life-threatening asthma who may be too dyspneic to perform the test.

Severity of Acute Asthma

Initial assessment is based on a combination of clinical features, peak flow measurement, and pulse oximetry.

Moderate Exacerbation of Asthma

Symptoms of moderate exacerbation include:
- Peak flow 50–75% of best or predicted.
- No features of acute severe asthma.

Acute Severe Asthma

Characterized by any one of the following:
- Peak flow 33–50% of best or predicted.
- Respiratory rate (RR) ≥25/min.
- Heart rate ≥110/min.
- Inability to complete sentences in one breath.

Life-Threatening Asthma

Defined as severe asthma with any one of the following:
- Peak flow <33% of best or predicted.
- Other life-threatening symptoms.

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Description

Test your knowledge on measuring and interpreting peak expiratory flow rate (PEFR) in asthma patients. Learn to make an initial assessment of asthma severity using clinical features, peak flow measurement, and pulse oximetry.