Quality Messages and Quality Grades
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EasyOne Pro™ / EasyOne Pro™ LAB
SVC Quality Grades
5.3 DLCO Quality Messages and Quality Grades
The quality grading is based on ATS/ERS Guidelines [3].
DLCO Quality Messages
Rating
Criteria
A
At least 3 acceptable tests AND the difference between the best VC values is equal to
or less than 150 ml.
B
At least 2 acceptable tests AND the difference between the best VC values is equal to
or less than 150 ml.
D (1)
At least 2 acceptable trials but the results are not reproducible according to 'B'.
D (2)
Only one acceptable trial
F
No acceptable trial available
Message
Criterion
Recommended action
Breath Hold Time out
of Range
Maneuver not
acceptable. Breath
Hold Time is outside
the 8-12 seconds
range
Breath-hold time outside 8 to 12
seconds
Exhale immediately when the
valve opens
Parameter out of
Range
Test cannot be
evaluated; sensor
signals do not pass
QC check
A parameter is out of range, e.g. a
gas concentration is higher or
lower than permitted
1)
Helium concentration out of
range
2)
CO at zero not within 80 ppm
3)
CO at DLCO test gas not
within 500 ppm
4)
Alveolar CO out of range
5)
Expiratory CO out of range
6)
VA out of range
7)
DLCO out of range
Check for leaks; make sure
concentrations of gas cylinder are
entered correctly
