19
Excessive ambient light may affect the measuring result,including uorescent
lamp, dual ruby light, infrared heater, direct sunlight and etc.
There should not be such light barrier as rubber fabric on the way of light, or it
may result in incorrect measure results of SpO2 and pulse rate.
The SpO2 probe and photoelectric receiving tube should be arranged in a way
with the testee’s arteriole in a position there between.
The SpO2 sensor should not be used at a location or limb tied with arterial
canal or blood pressure cuff or receiving intravenous injection.
Acute testee movement or electrosurgical interference can affect the accuracy.
Data update period is less than 5 seconds, which is changeable according to
different individual pulse rate.
Please read the measured value when the waveform on screen is equable and
steady-going, of which the value is optimal. And the waveform at the moment
is the standard one.
The problem of overrating would display when the patient is suffering from
toxicosis which caused by carbon monoxide, the device is not recommended
to be used under this circumstance.
The nger shall be put correctly (refer to the related Figure 4-3-2 in the manual)
or the measurement results may be incorrect.
4.4 Clinical Restrictions
SpO2
1) As the measure is taken on the basis of arteriole pulse, substantial pulsating
blood ow 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 measure-
ment will be more sensitive to interference.
2) For those with a substantial amount of staining dilution drug (such as methyl-
ene 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) The 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.
Warning: Please refer to corresponding medical literature for details about
clinical limits and tabu illness.
ENGLISH
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