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How to perform spirometry scoring

M3 India Newsdesk May 22, 2022

Spirometry can help interpret lung function and diagnose obstructive and restrictive lung disease. A spirometric device works by measuring the airflow into and out of the lungs. The medical device is used to diagnose conditions like asthma, chronic obstructive pulmonary disease (COPD) and other conditions that affect breathing. The article explains the ideal index pattern of the airflow in the device. 


Empey’s index [1]

It shows a relationship between PEF and FEV1 and that a disproportionately low PEF should alert the clinician to the possibility of upper airway obstruction. Empey’s index is the ratio of forced expiratory volume in 1s (FEV1) in ml and peak expiratory flow (PEF) in L/min.

Ratio >8 indicates upper airway obstruction
(Greater the ratio, greater the obstruction)


FEF50/FIF50 [2]

(FEF50 is forced expiratory flow at 50% or mid expiration, and FIF50 is forced inspiratory flow at 50% or mid inspiration)

Types of flow-volume loops


 



Click here to see references

This article was originally published on 22 July 2021.

 

Disclaimer- The views and opinions expressed in this article are those of the author's and do not necessarily reflect the official policy or position of M3 India.

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