Soalan tentang PEFR dan Spirometry

What is the definition of Peak Expiratory Flow Rate (PEFR)?

• The amount of air that enters the lungs during normal inspiration

• The maximum airflow rate during forced expiration after maximum inspiration

• The amount of air that can be held in the lungs after full expiration

• The amount of oxygen used during exercise

The average normal PEFR value for adult males is around:

• 200–350 L/min

• 300–500 L/min

• 500–650 L/min

• 700–900 L/min

What factors influence PEFR values?

• Gender, age, height, ethnicity

• Type of food and exercise

• Room temperature and humidity

• Sitting or standing position only

Daily variability of PEFR exceeding 20% indicates:

• Normal variation

• Good asthma control

• Poor asthma control

• Stable COPD

What is an example of a condition where PEFR readings are consistently low?

• Acute asthma

• COPD

• Pneumonia

• Pulmonary embolism

In the procedure for performing PEFR, the reading that needs to be recorded is:

• First reading

• Last reading

• Average reading

• Highest reading

Key parameters measured in spirometry include:

• FEV₁, FVC, FEV₁/FVC ratio

• BMI, body temperature, pulse rate

• Only PEFR

• Oxygen saturation and respiratory rate

The main characteristic of a restrictive pattern in spirometry is:

• FEV₁ ↓, FVC ↓ significantly, FEV₁/FVC normal/↑

• FEV₁ ↓, FVC normal, FEV₁/FVC ↓

• FEV₁ normal, FVC ↑, FEV₁/FVC normal

• All parameters increase

The main characteristic of an obstructive pattern in spirometry is:

• FEV₁/FVC ratio ↑

• FEV₁/FVC ratio ↓ (<0.7)

• FEV₁/FVC ratio normal

• FVC ↑ dramatically

What is the main difference between PEFR and Spirometry?

• PEFR measures various parameters while spirometry only measures peak flow

• PEFR is suitable for diagnosis, while spirometry is only for monitoring

• PEFR is portable and for monitoring, spirometry is more comprehensive and for clinical diagnosis

• Both are only used for breathing exercises