Instructions for use – Infinity Acute Care System – Monitoring Applications VG6.n 275
SpO2 and pulse rate with Nellcor OxiMax MCable
Patient preparation for SpO2 monitoring
The following tips provide optimal SpO2 monitoring
results but must never replace hospital-approved
practices or manufacturer’s recommendations.
The accuracy of SpO2 monitoring depends largely
on the strength and quality of the SpO2 signal.
If a finger is used as a monitoring site, remove any
nail polish. Cut the finger nails of the patient, if
necessary, for better sensor placement.
Pulses may be counted erroneously due to the
following conditions:
– Placement of a sensor that is too tight
– Patient experiences hypotension, severe
vasoconstriction, severe anemia, or
hypothermia
– Arterial occlusion proximal to the sensor
– Patient is in cardiac arrest or is in shock
– Bright light causing erratic measurement or
missing values. Cover the sensor with opaque
material if it is likely to be exposed to direct
bright light.
– Significant levels of dysfunctional hemoglobins
(HbCO or MetHb)
– Intravascular dyes such as indocyanine green
or methylene blue
– Excessive patient movement
– Venous pulsations
– Placement of a sensor on an extremity with a
blood pressure cuff, arterial catheter, or
intravascular line
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