Principle Of Measurement - Gima OXY-5 Manual De Uso

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2.3 Environment Requirements
Temperature:
Operating Temperature: 10°C ~40°C
Storage Temperature: -20°C~55°C
Humidity:
Operating Humidity: 35%~80%
Storage Humidity: 10%~100%
Atmospheric pressure:
Operating Pressure: 70kPa~106kPa
Storage Pressure: 50kPa~106kPa

2.4 Principle of Measurement

The measurement of pulse oximeter is that it uses a multi-functional oxyhemoglobinometer
to transmit some narrow spectrum light bands through blood samples and to measure
attenuation of spectrum with different wavelengths according wo the characteristic that
RHb, O HB, Met Hb and COHb absorb the light of different wavelength, thereby determining
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O Hb saturation of different fractions. O
2
Fractional O Hb saturation = [O
2
Oppositely, pulse oxygen oximeter measures functional O
Functional O Hb saturation = [O
2
Present SpO oximeter transmits light of two wavelengths only, red light (wavelength 660
2
nm) and infrared (wavelength 940 nm), to differentiate HbO
sensor contains two LEDs, and the other side contains a photoelectric detector. SpO
oximeter measures HbO
beats. The result is quite precise when HbO
2.5 Caution
A. The finger should be placed properly (see the attached illustration of this manual), or else
it may cause inaccurate measurement.
B. The SpO sensor and photoelectric receiving tube should be arranged in a way with the
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subject' s arteriole in a position there in between.
C. The SpO sensor should not be used at a location or limb tied with arterial canal or blood
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pressure cuff or receiving intravenous injection.
D. Do not fix the SpO
inaccurate measure of SpO
E. Make sure the optical path is free from any optical obstacles like rubberized fabric.
F. Excessive ambient light may affect the measuring result. It includes fluorescent lamp, dual
ruby light, infrared heater, direct sunlight and etc.
G. Strenuous action of the subject or extreme electrosurgical interference may also affect
the accuracy.
H. Testee can not use enamel or other makeup on the finger.
Hb saturation is called "fractional" O
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Hb / (RHb + O
2
Hb / (RHb + O
2
saturation in the blood by the light plethysmograph when the pulse
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sensor with adhesive or else it may result in venous pulsation and
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.
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ENGLISH
Hb + Met Hb + COHb)] × 100
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Hb saturation:
2
Hb)] × 100
2
from HbR. One side of the
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saturation is over 70% ~ 95%.
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Hb saturation.
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2