Use Instructions

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MasterScope - Instructions for Use
Version 03.00 • Date 19FEB2020
Forced Spirometry: Repeatability of test set
• No repeatability: Less than 3 acceptable measurements recorded
• FEV1 repeatability is unacceptable
Difference in FEV1 from best to second best is greater than 150 mL.
• FVC repeatability is unacceptable
Difference in FVC from best to second best is greater than 150 mL.
• PEF repeatability is unacceptable
Difference in PEF from best to second best is greater than 0.67 L/sec.
Slow Spirometry: Repeatability of test set
• IC repeatability is unacceptable
Coefficient of Variation (CV) is greater than 6%.
• VC repeatability is unacceptable
Difference in VC from highest to second highest is greater than 150 mL.
Messages for repeatability and/or acceptability are evaluated. This is also
recalculated after every new measurement performed.
E code Description
L IC repeatability is unacceptable
M VC repeatability is unacceptable
N No repeatability: Less than 3 acceptable slow measurements
O Expiration time was too short
P No plateau was detected at the end of the expiration
Q End-expiratory level of the tidal breathing was too variable
Slow Spirometry:
In the MasterScope, acceptability and repeatability errors are implemented as error
codes. These error codes are shown on the screen and on the PFT reports:
Forced Spirometry:
E code Description
A No repeatability: Less than 3 acceptable forced measurements
B FEV1 repeatability is unacceptable
C FVC repeatability is unacceptable
D Expiration time was too short
E No plateau was detected at the end of the expiration
F Back extrapolated volume was too large
G PEF repeatability is unacceptable
H Late peak flow detected
I Coughing was detected in the first part of the expiration