MEDIAID 340V, Руководство пользователя, Страница: 7 / 40

Principles of Operation of the Model 340V
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Chapter 1:
Principles of Operation of
the Model 340V
1.1 Intended Uses
The Model 340V is intended to
continuously monitor an animal’s
arterial oxygen saturation and
heart rate. It also provides body
temperature information every two
minutes or on command.
1.2 Principles of Pulse Oximetry
The Mediaid Model 340V Pulse Oximeter is designed to measure the
percentage oxygen saturation (%SpO
2
) of functional hemoglobin. Non-
invasive arterial oxygen saturation measurement is obtained by directing
red and infrared light through a pulsating vascular bed. The pulsating
arterioles in the path of the light beam cause a change in the amount of
light detected by a photodiode. The pulse oximeter measures within the
pulse waveform the ratio of transmitted red to infrared light, and thereby
determines the oxygen saturation of arterial blood. The non-pulsatile
signal is removed electronically for the purpose of calculation. Therefore,
skin, bone and other non-pulsating substances do not interfere with the
calculation of arterial oxygen saturation.
1.3 Principle of Measuring Body Temperature
The Mediaid Model 340V’s temperature component is designed to
measure the animal’s core temperature with a rectal thermistor sensor.
The thermistor’s highly sensitive resistance decreases with increasing
temperature. The LED display indicates the animal’s body temperature.
WARNING
Before using the Model 340V, the
user should become thoroughly
familiar with the information in this
manual and with all information
included with the sensors.