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Malfunction caused by anesthesia, trauma resulting from major
surgery or medical examination, or other diseases due to virus or
bacteria can also cause a reduction in oxygen hemoglobin
saturation in arterial blood which can be detected by the pulse
oximeter through a low SpO2 reading. This can result in symptoms
such as depression, vomiting, and asthenia in patients.
The fingertip pulse oximeter is a compact, low-power consumption,
portable device. When the index finger is inserted into the fingertip
photoelectric sensor, the display screen of the Braun Pulse oximeter
will show the measured value of %SpO2 and pulse rate as well as a
vertical bar graph showing the pulse amplitude.
Measurement principle
Pulse oximetry is based on the difference in the selective absorption
of red light by oxygenated blood or oxyhemoglobin (HbO2, which is
bright red) as compared to deoxyhemoglobin (Hb, which is dull red)
or de-oxygenated blood. This selective absorption is based on the
Beer Lambert Law. A red (660nm) and infrared LED (940nm) on the
top portion of the prospective clamp finger-type sensor emits light
at these two frequencies. The red light transmitted through the
finger is selectively absorbed by the oxygenated arterial blood and
the remaining light is detected by a photodetector on the lower
portion of the clamp finger. The infrared light then passes through
the finger without any selective absorption and is detected by the
photodetector on the lower side of the clamp. The transmitted light
captured by the photodetector is converted into a voltage or
current signal and then passed through signal conditioning and
filtering circuits using a microprocessor. %SpO2 is then derived by
analyzing the changes in the amplitude of these pulsatile signals
derived from the photodetector and calibrating them using pulse
scanning and recording technology. The pulse rate is then derived
from these associated waveforms.
Product description
1. OLED display
3. Power/Menu button
How to use your Braun Pulse oximeter
Installing and replacing batteries
(initial set up)
Push on the edge of the battery cover behind the arrows to slide it
from the device.
Push down the battery cover
Push the battery cover on
4
Push down the battery cover
2. Finger clip
4. Lanyard
Install 2 AAA batteries.
Replace battery cover.
Taking a measurement
Push the battery cover on
Press on top and bottom housing to open rubber finger clip.
Insert finger with nail facing up into rubber finger clip.
It is recommended that you use the oximeter on your index finger.
Make sure you finger is fully inserted into the device and not pressed
hard into a surface.
Press Power/Menu button on the top of the device.
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