Operator's Manual

Chapter 6 Taking medical readings
Tempus Pro User/Operator Manual - 41-2001EN-00 – Page 90
Note
Loss of pulse signal can occur in any of the following situation:
 The sensor is too tight.
 There is excessive illumination from light sources such as a surgical lamp, a bilirubin
lamp, or sunlight.
 A blood pressure cuff is inflated on the same extremity as the one with a SPO
2
sensor
attached.
 The patient has hypotension, severe vasoconstriction, severe anaemia, or hypothermia.
 There is arterial occlusion proximal to the sensor.
 The patient is in cardiac arrest or is in shock.
Note
High levels of COHb may occur with a seemingly normal SpO2. When elevated levels of
COHb are suspected, laboratory analysis (CO-Oximetry) of a blood sample should be
performed.