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2.2 Major Applications and Scope
The Fingertip Oximeter can detect SpO2 and pulse rate through patient’s nger,
and indicate the pulse intensity by the bar-display. This device is applicable
to home, hospital (including internal medicine, surgery, anesthesia, pediatrics,
emergency room etc.), oxygen bar, the community medical center, alpine area
and it also can be used before or after sports, and the like.
This device is not appropriate to be used for continuous monitoring.
2.3 Environment Requirements
Temperature:
Operating Temperature: 5°C ~40°C
Storage Temperature: -20°C~60°C
Humidity:
Operating Humidity: 30%~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 oxyhe-
moglobinometer 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, O2Hb, Met Hb and COHb absorb the
light of different wavelength, thereby determining O2Hb saturation of different
fractions. O2Hb saturation is called “fractional” O2Hb saturation.
Fractional O2Hb saturation = [O2Hb / (RHb + O2Hb + Met Hb + COHb)] × 100
Oppositely, pulse oxygen oximeter measures functional O2Hb saturation:
Functional O2Hb saturation = [O2Hb / (RHb + O2Hb)] × 100
Present SpO2 oximeter transmits light of two wavelengths only, red light (wave-
length 660 nm) and infrared (wavelength 940 nm), to differentiate HbO2 from
HbR. One side of the sensor contains two LEDs, and the other side contains a
photoelectric detector.
SpO2 oximeter measures HbO2 saturation in the blood by the light plethysmo-
graph when the pulse beats. The result is quite precise when HbO2 saturation
is over 70% ~ 95%.
ENGLISH
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General
Weight and Dimensions
