
Chapter 7: Printer
7-2 Pulse Oximeter for Sleep Screening Operation Manual
• 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
XX
s
where X is the sample value,
is
the sample mean, and n is the number of samples. Note: The data sample is generally not normally
distributed.
Comentarios a estos manuales