PHYSIOLOGY
PULMONARY PHYSIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which is a reason you would NOT perform an exercise test in pulmonary disease?
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evaluate dyspnea
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evaluate SpO2
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determine exercise tolerance
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investigate presence of heart disease
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determine V/Q match
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Explanation:
Detailed explanation-1: -Anything that affects the blood flow and oxygenation in the lung can cause a V/Q mismatch. An increased V/Q mismatch is caused by a decrease in blood flow to the lung, for example a pulmonary embolism. A decreased V/Q mismatch is caused by a decrease in ventilation or an airway obstruction, for example Asthma.
Detailed explanation-2: -The V/Q ratio evaluates the matching of ventilation (V) to perfusion (Q). There is regional variation in the V/Q ratio within the lung. Ventilation is 50% greater at the base of the lung than at the apex. The weight of fluid in the pleural cavity increases the intrapleural pressure at the base to a less negative value.
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