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body via finger artery. The fingertip pulse oximeter works
by applying a sensor to a pulsating arteriolar vascular bed.
The sensor contains a dual light source and photo detector.
The one wavelength of light source is 660 nm, which is red
light; the other is 905 nm, which is infrared-red light. Skin,
bone, tissue and venous vessels normally absorb a
constant amount of light over time. The photo detector in
finger sensor collects and converts the light into an elec-
tronic signal which is proportional to the light intensity. The
arteriolar bed normally pulsates and absorbs variable
amounts of light during systole and diastole, as blood
volume increases and decreases.
4. Directions for use
1. Insert the batteries as described in the «Inserting the
batteries» section.
2. Insert one finger (nail side up; index or middle finger is
recommended) into the finger opening of the device.
Be sure to fully insert the finger so that the sensors are
completely covered by the finger.
3. Release the device allowing it to clamp down on the
finger.
4. Press the ON/OFF button 1 to turn the device on.
5. Do not shake your finger during the test. It is recom-
mended that you do not move your body whilst taking
a reading.
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6. Your measurement values will appear on the screen
after a few seconds.
7. Remove your finger from the device.
8. The device will automatically switch off after approx.
10±2 seconds after the finger is removed from the
device.
The height of the bar graph 4 is an indication of
the pulse and signal strength. The bar should be
greater than 30 % for a proper reading.
The device must be able to measure the pulse
properly to obtain an accurate SpO
ment. Verify that nothing is hindering the pulse
measurement before relying on the SpO
measurement.
The maximum application time at a single
site should be less than 30 minutes, in order
to ensure correct sensor alignment and skin
integrity.
Inaccurate measurements may occur if:
The patient suffers from significant levels of dysfunc-
tional hemoglobin (such as carboxyhemoglobin or
methemoglobin).
Intravascular dyes such as indocyanine green or meth-
ylene blue have been injected into the patient.
Used in the presence of high ambient light (e.g. direct
sunlight). Shield the sensor area with a surgical towel if
necessary.
There is excessive patient movement.
The patient experiences venous pulsations.
The patient has hypotension, severe vasoconstriction,
severe anemia, or hypothermia.
The patient is in cardiac arrest or is in shock.
Fingernail polish or false fingernails are applied.
5. Inserting the batteries
measure-
After you have unpacked your device, first insert the
2
batteries. The battery compartment is on the bottom of the
device. Remove the battery cover by sliding it in the direc-
2
tion shown. Insert the batteries (2 x 1.5 V, size AAA),
thereby observing the indicated polarity.
Replace the batteries when the low power indi-
cator 5 appears on the display.
Always replace both batteries at the same time.
6. ON/OFF button / Function button
Press and release the ON/OFF button 1 to turn on, hold
the button for about one second. The device shows the
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