Chapter 4: T
echnical Specifications
The Spirometry Source
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• MIF50%
(l/s) Maximum Inspiratory flow with
50% of FVC inspired
• FIVC
(l)
Forced Inspiratory Vital Capacity
• FIV1
(l)
Forced Inspirometry Volume in 1
second
• FIV1/FIVC (%)
Ratio
• FEV1/FIV1 (%)
Ratio
• PIF
(l/s) Inspiratory Flow Apex
• MTT
(s)
Mean Transit Time
• PEF/PIF
(-)
Ratio
• Vext
(%)
Extrapolated Volume
• MVVInd
(l/min) Maximum Voluntary Ventilation
(30 x FEV1)
• FEV6
(l)
Forced Expiratory Volume in 6
seconds
• FEV1/FEV6 (%)
Ratio
• EPOC rate
Parameter that depends on the
number of cigarettes smoked a day,
the age and FEV1. Indicates the
risk of EPOC.
• Lung Age
Parameter that depends on the
height and FEV1. Indicates the
equivalent age of the lung.
Interpretation based on:
•ATS
Percentage deviation in relation to values of
reference
Standardized values of predicteds that can be
selected from several standards
Patient’s ID details
Atmospheric data on temperature, pressure and
relative humidity