Spirometry principles - Grace
Spirometry principles - Grace
Spirometry principles - Grace
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Prediction equations and limits of<br />
normality<br />
• Numerous prediction equations have been<br />
derived from spirometric surveys of normal<br />
populations (exclude all smokers and<br />
cardiothoracic illness)<br />
• Spirometric parameters can be predicted on<br />
the basis of gender, age and heigth<br />
• They use the lower limit of normal (LLN)