BT-550 Operation manual
41
P/N : 550-ENG-OPM-EUR-R01
Bistos Co., Ltd.
2018.03
Do not autoclave or gas sterilize this oximeter.
Do not soak or immerse the monitor in any liquid.
Use the cleaning solution sparingly. Excessive solution can flow into the monitor
and cause damage to internal components.
Do not touch, press, or rub the display panels with abrasive cleaning compounds,
instruments, brushes, rough-surface materials, or bring them into contact with
anything that could scratch the panel.
Do not use petroleum-based or acetone solutions, or other harsh solvents, to
clean the oximeter. These substances attach the device’s materials and device
failure can result.
Check alarm limits each time the MS board pulse oximeter is used to ensure that
they are appropriate for the patient being monitored.
If the accuracy of any measurement does not seem reasonable, first check the
patient’s vital signs by alternate means and the check the MS board pulse
oximeter for proper functioning.
Inaccurate measurements may be caused by
Incorrect sensor application or use
Significant levels of dysfunctional hemoglobin. (e.g., carboxyhemoglobin or
methemoglobin)
Intravascular dyes such as indocyanine green or methylene blue.
Interfering Substances: Dyes, Nail polish or any substance containing dyes,
that change usual blood pigmentation may cause erroneous readings.
Pulse rate measurement is based on the optical detection of a peripheral flow
pulse and therefore may not detect certain arrhythmias. The pulse oximeter
should not be used as a replacement or substitute for ECG based arrhythmia
analysis.
Exposure to excessive illumination, such as surgical lamps (especially ones
with a xenon light source), bilirubin lamps, fluorescent lights, infrared heating
lamps, or direct sunlight (exposure to excessive illumination can be corrected
by covering the sensor with a dark or opaque material)
Excessive patient movement
SpO
2
is empirically calibrated to functional arterial oxygen saturation in
healthy adult volunteers with normal levels of carboxyhemoglobin (COHb)
and methemoglobin (MetHb). A pulse oximeter cannot measure elevated
levels of COHb or MetHb. Increase in either COHb or MetHb will affect the
accuracy of the SpO
2
measurement.
For increased COHb: COHb levels above normal tend to increase the
level of SpO
2
. The level of increase is approximately equal to the amount
of COHb that is present. High levels of COHb may occur with a seemingly
normal SpO
2
. When elevated levels of COHb are suspected, laboratory
analysis (CO-Oximetry) of a blood sample should be performed.
For increased MetHb: the SpO
2
may be decreased by levels of MetHb of
up to approximately 10% to 15%. At higher levels of MetHb, the SpO
2
may tend to read in the low to mid 80s. When elevated levels of MetHb
