Peak Performance - Investigations of respiratory disease

5 important questions on Peak Performance - Investigations of respiratory disease

What happens to the FEV1:FVC with obstructive conditions?

Both the FEV1 and the FVC fall, however the FEV1 falls more significantly than the FVC. Consequently, the FEV1:FVC ratio decreases.

What happens to the RV in patients who have chronic obstructive diseases?

Increases. The FVC decreases before the RV is reached. Air is trapped in the lungs- characteristic of these types of diseases. Consequently, the RV increases.

What is the relevance of the nitric oxide exhalation test?

Nitric oxide is present in our breaths. It increases in asthma and is an indicator of inflammation of the airways.
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What is the relevance of an exercise test?

Sometimes resting measurements may not be helpful in assessing decreased pulmonary function. Assessing the patient's ability to perform certain physically active tasks can indicate disability/ improvements.
Used to determine the main cause of breathlessness.

What is the link between exercise, cardiovascular system and respiratory system?

Exercise can be used to determine whether limits in physical activity are due to cardiology or respiratory problem.
Cardiovascular: if the patient reaches their predicted maximum heart rate during exercise- indicates that the efforts of the cardiovascular system are limiting further exercise.
Respiratory: if the patient does not reach their predicted maximum heart rate before they cease exercise- indicates that ventilation efforts are limiting further exercise.

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