Virtuox VPOD, Инструкция по эксплуатации, Страница: 8 / 16

Vpod Instruction Manual
7
under the “Setting mode” will be saved, at the same time, the system will exit from “Setting mode”.
Notices:
1.
To confirm the modification, the act of pressing both buttons simultaneously must be fleet. Do not
press them for long time.
2. When setting date and time, please don’t insert finger.
Cancel and exit from “Setting mode”
Under the Setting mode, double-press the Function button, the modification under “Setting mode” will
be cancelled and simultaneously, the system will exit from “Setting mode”.
If there is no operation under Setting mode” for more than 30 seconds, the system will exit from
“Setting mode” automatically.
CHAPTER 4 Take a measurement
4.1 Monitoring
SpO
2
measuring is a non-invasive technique used to measure the amount of oxygenated hemoglobin
and pulse rate by measuring the absorption of selected wavelengths of light. The light emitted by a red
and infrared light-emitting diodes passes through the tissue and is converted into electrical signals by
a photodiode.
After finishing the settings contained in chapter 3, plug your finger into the sensor shown as the
following picture:
Fig 6 placement of the sensor
Select the suitable sensor in terms of type and dimension.
Clip the sensor to the rational position of the patient finger. And ensure that the patient’s nail
surface is facing upward.
Plug sensor into SpO
2
port on top panel of pulse oximeter.
Notice: To maintain the highest degree of accuracy, it is recommended that the finger and the
oximeter sensor/probe are kept as still as possible.
4.2 Mode switch
After turning on the oximeter, each time the function button is pressed, the oximeter will switch to
another display mode, shown as Fig.7.
4.3 Factors that may affect the measurement
During operation, the accuracy of oximeter readings can be affected by the following factors:
4.3.1 Instrument performance depends on the pulsatile character of the artery. The measurement
would not be considered reliable and accurate if the following conditions are present during
measurement:
Shock or cardiac arrest
Temperature of the digit
After the administration of a cardiovascular drug
Anemia
Evidence of ventilation-perfusion mismatch
4.3.2 Instrument performance depends on the wavelength absorption for oxyhemoglobin and
deoxyhemoglobin. If there are substances absorbing the same wavelength, this would induce false or
low SpO
2
values. The following may affect these values:
carboxyhemoglobin
methemoglobin
methylene blue
Indigo carmine
4.3.3 Extremely high illumination could affect the SpO
2
measurement. Use a semi-translucent or
opaque cover to shield the sensor.
4.3.4
Other factors
a) High-frequency electrosurgical interference from external devices, including defibrillators.
b) Placement of a sensor on an extremity that currently has installed a blood pressure cuff, arterial
catheter, or intravascular line;
c) The patient has hypotension, severe vasoconstriction, severe anemia, or hypothermia;
d) An arterial occlusion proximal to the sensor.
Warnings
Use only SpO
2
sensors provided by manufacturer. Other SpO
2
sensors may cause improper
performance.
Do not use an SpO
2
sensor with exposed optical components.
Excessive patient movement may cause inaccurate measurements.
Tissue damage can be caused by incorrect operation or misusing sensor; for example, by