Chapter 7: Printer
7-2
Pulse Oximeter for Sleep Screening Operation Manual
Study Maximums and Minimums – The study maximums and minimums section contains the
following information:
Low SpO
2
– The lowest recorded SpO
2
value taken from the total valid sample.
Time of Lowest SpO
2
– Records the time the lowest SpO
2
reading occurred (clock does not
ignore invalid data when determining lowest SpO
2
time).
High PR – The highest recorded pulse rate value taken from the total valid sample.
Low PR – The lowest recorded pulse rate value taken from the total valid sample.
Avg. SpO
2
– The average SpO
2
value from the total valid sample.
SpO
2
STD – The standard deviation is a measure of the variability of the sample. The larger
the standard deviation of the sample data, the more variability there is in the sample.
1
Statistics - The statistics section contains information calculated from the valid data only. The
following information is supplied in the statistics section:
% Time per SpO
2
range – This section displays the percent of the valid sample time that
the readings were in a specified range. (Sample must be > 1% to be accounted for here.)
Time per SpO
2
range – This section displays the total valid sample time that the readings
were in a specified range.
Total duration below 90% SpO
2
– This section displays the total valid sample time that the
SpO
2
readings were below 90%.
Total duration 88% SpO
2
& below – This section displays the total valid sample time that
the SpO
2
readings were 88% and below.
Longest single event with SpO
2
88% & below – This section displays the duration of the
longest single event when the % SpO
2
value was 88% or below.
Started at – This section displays the time the longest single event with SpO
2
88% and
below began.
Summary Complete – This final section will contain a notification that the summary is
complete. This section is important because of the pauses that occur during printing.
NOTE! Only stored data will be printed. Real-time printing is not available.
NOTE! The monitor uses a “relative time” clock. The times indicated on the printout are
relative to the start of the study. When the monitor switches from Verification to
Data Collection Mode, it restarts the “relative” time clock to 00:00:00.
1
The
standard deviation, s, is calculated by:
(
)
1
2
−
−
=
∑
n
X
X
s
where X is the sample value,
X
is the sample
mean, and n is the number of samples. Note: The data sample is generally not normally distributed.
4.
•
•
•
•
•
•
5.
•
•
•
•
•
•
6.
