
7-3
NOTE
Place the SpO
2
sensor cable along the backside of patient’s hand. Make sure the
fingernail is just opposite to the light emitted from the sensor.
SpO
2
waveform amplitude is not proportional to the pulse strength.
SpO
2
value is not proportional to the pulse rate.
7.3 Monitoring Procedure
1. Power on the monitor.
2. Remove colored nail polish from the application site.
3. Apply the sensor to the patient.
4. Plug the connector of the sensor extension cable into the SpO
2
connector on the
monitor.
7.4 Measurement Limitations
If you doubt the measured SpO2, check patient vital signs first. Then check the patient
monitor and SpO2 sensor. The following factors may influence the accuracy of
measurement:
Ambient light
Physical movement (patient and imposed motion)
Diagnostic testing
Low perfusion
Electromagnetic interference, such as MRI environment
Electrosurgical units
Dysfunctional haemoglobin, such as carboxyhemoglobin (COHb)and methemoglobin
(MetHb)
Presence of certain dyes, such as methylene and indigo carmine
Inappropriate positioning of the SpO2 sensor, or use of incorrect SpO2 sensor
Drop of arterial blood flow to immeaurable level caused by shock, anemia, low
temperature or vasoconstrictor.
The absorption of oxyhemoglobin (HbO
2
) and deoxyhemoglobin to the light of special
wavelength may also affect the accuracy of the SpO
2
measurement. In the presence of other
substances (such as carbon hemoglobin, methemoglobin, methylene blue and indigo
carmine) that absorb the light of the same wavelengths, false or low SpO
2
readings may
result.
Komentarze do niniejszej Instrukcji