Smart One Oxi
English
Rev.1.8
User Manual
Page 27 of 35
MALFUNCTIONING
Storage conditions
SOLUTION
The turbine has not been
inserted properly
Insert the turbine from the front part
of the device by pushing it downwards
until it stops, and then rotating it in a
clockwise direction
The oximetry test has
not been stored
The test lasted less than
30
seconds
or
the
average value of the
finger
pressure
was
unsatisfactory
Repeat the test following the
instructions given on the display and
wait at least 30 seconds for the test to
complete.
11.
ACCURACY AND RELIABILITY
For the spirometry measurements, the device complies with the requisites of the following
standards:
Standardisation of the spirometry (ATS 2005, 2019 update)
ISO 23747: 2015
ISO 26782: 2009
Volume max
10 I
Volume accuracy: the higher value between
2.5% and
0.05 l (ATS 2019)
Max. peak flow
960 l/min (16 l/s)
Peak flow accuracy: highest value between
10% and
20 l/min (
0.33 l/s)
Time zero
At the point of peak expiratory flow (PEF), a tangent
is drawn with a slope equal to PEF and its
intersection on the abscissa defines TIME ZERO. The
back extrapolated volume is the volume of gas that
has already been exhaled at the point of TIME ZERO
as defined by back extrapolation. The method to
determine the time elapsed by TIME ZERO, t0, is
given by the following equation:
