Technical Specifications - ZONDAN A3 Instructions Pour L'utilisateur

3. PRINCIPLE AND CAUTION
3.1 PRINCIPLE OF MEASUREMENT
Principle of the device is as follows: An experience formula of data
process is established taking use of Lambert Beer Law according to
Spectrum Absorption Characteristics of Reductive hemoglobin (Hb) and
oxyhemoglobin (HbO2) in glow & near-infrared zones. Operation principle
of the instrument is: Photoelectric Oxyhemoglobin Inspection Technology
is adopted in accordance with Capacity Pulse Scanning & Recording
Technology, so that two beams of different wavelength of lights can be
focused onto human nail tip through perspective clamp finger-type sensor.
Then measured signal can be obtained by a photosensitive element,
information acquired through which will be shown on screen through
treatment in electronic circuits and microprocessor.
Figure 1. Operating principle
660 nm Glow and
940 nm infrared-ray -
Emission tube
Glow and
infrared-ray -
Receipt tube
3.2 CAUTION
1. The finger should be placed properly (see the attached illustration of this
manual, Figure 5), or else it may cause inaccurate measurements.
2. The SpO2 sensor and photoelectric receiving tube should be arranged in
a way with the subject's arteriole in a position there between.
3. The SpO2 sensor should not be used at a location or limb tied with
arterial canal or blood pressure cuff or receiving intravenous injection.
4. Make sure the optical path is free from any optical obstacles like
rubberized fabric.
5. Excessive ambient light may affect the measuring result. It includes
fluorescent lamp, dual ruby light, infrared heater, direct sunlight etc.
6. Strenuous action of the subject or extreme electrosurgical interference
may also affect the accuracy.
7. Pulse rate and SpO2 alarm
When a certain physiological parameter exceeds the set alarm
range, a physiological alarm is triggered, and the parameter on the
screen will change color, reminding the user to pay attention to the
measured parameter.
SpO2 parameter values:
Color Range
Green 85–99
Orange Parameter value is outside the 'green range'
Pulse Rate value:
Color Range
Green 50-120
Orange Parameter value is outside the 'green range'
3.3 CLINICAL RESTRICTIONS
1. As the measure is taken on the basis of arteriole pulse, substantial
pulsating blood flow of subject is required. For a subject with weak pulse
due to shock, low ambient/body temperature, major bleeding, or use of
vascular contracting drug, the SpO2 waveform (PLETH) will decrease. In
this case, the measurement will be more sensitive to interference.
2. For those with a substantial amount of staining dilution drug (such as
methylene blue, indigo green and acid indigo blue), or carbon monoxide
hemoglobin (COHb), or methionine (Me+Hb) or thiosalicylic hemoglobin,
and some with icterus problem, the SpO2 determination by this monitor
may be inaccurate.
3. Drugs like dopamine, procaine, prilocaine, lidocaine and butacaine may
also be a major factor blamed for serious error of SpO2 measure.
4. As the SpO2 value serves as a reference value for judgement of anemic
anoxia and toxic anoxia, some patients with serious anemia may also
report good SpO2 measurement.

4. TECHNICAL SPECIFICATIONS

1. Display format: TFT Display; SpO2 measuring range: 35% ~ 99%;
Pulse rate measuring range: 30 bpm ~ 240 bpm;
2. Power requirements: 2x 1.5 V AAA battery
3. Power consumption: 150 mW
4. Resolution: 1% for SpO2 and 1 bpm for pulse rate; perfusion index: 0.1%.
5. Measurement accuracy: ±2% in stage of 70% ~ 100% SpO2, and
meaningless when stage being smaller than 70%. ±2 bpm during the
pulse rate range of 30 bpm ~ 99 bpm and ±2% during the pulse rate
range of 100 bpm ~ 250 bpm.
6. Resistance to surrounding light: The deviation between the value
measured in the condition of man-made light or indoor natural light and
that of darkroom is less than ±1%.
7. It is equipped with a function switch: The device can enter standby
mode in case of no finger is inserted in the Oximeter within 8 seconds.
8. Optical sensor: Red light (wavelength is 660 nm, 6.65 mW) Infrared
(wavelength is 880 nm, 6.75 mW)
5. INSTALLATION
5.1 VIEW OF THE FRONT PANEL
Figure 2. Front view
SpO
Button
Pulse rate
Figure 3. Batteries installation
5.2 BATTERY
Step 1. Insert 2x AAA size batteries properly in the right direction.
Step 2. Replace the cover.
Please take care when you insert the batteries. The improper
insertion may damage the device.
6. OPERATING GUIDE
Figure 5. Put the finger in position
1. Clip the finger in between the rubber cushions (make sure the finger is
in the right position).
2. Press the switch button on front panel to exit standby mode.
3. Do not move the finger and keep the user at ease during the process.
4. Read the information directly from the screen display.
5. The device could change display direction according to the
handing direction.