Operator's Manual

6.3 Pulse oximetry
Tempus Pro User/Operator Manual - 41-2001EN-00 – Page 85
6.3 Pulse oximetry
WARNING
Do not use this device in the presence of high EMI/RFI radiation. High EMI/RFI
radiation may cause induced current to the SpO
2
sensor resulting in patient injury.
WARNING
This device may give inaccurate readings in the presence of strong electromagnetic
sources, such as electrosurgery equipment.
WARNING
This device may give inaccurate readings in the presence of computed tomography
(CT) equipment.
WARNING
Prolonged use or the patient’s condition may require changing the sensor site
periodically. Change sensor site and check skin integrity, circulatory status, and
correct alignment at least every 4 hours. Prolonged use may cause blisters, skin
deterioration, and discomfort.
WARNING
Incorrectly applied sensors may give inaccurate readings.
WARNING
SpO
2
measurements may be inaccurate in the presence of high ambient light. Shield
the sensor area (with a towel, for example) if necessary.
WARNING
Any condition that restricts blood flow, such as use of a blood pressure cuff or
extremes in systemic vascular resistance, may cause an inability to determine
accurate pulse rate and SpO
2
readings.
WARNING
Remove fingernail polish or false fingernails before applying SpO
2
sensors.
Fingernail polish or false fingernails may cause inaccurate SpO
2
readings.
WARNING
Significant levels of dysfunctional haemoglobins, such as carboxyhaemoglobin or
methaemoglobin, will affect the accuracy of the SpO
2
measurement.
WARNING
Tissue damage may result from overexposure to sensor light during photodynamic
therapy with agents such as verteporphin, porfimer sodium and
metatetrahydroxyphenylchlorin (mTHPC). Change the sensor site at least every hour
and observe for signs of tissue damage. More frequent sensor site changes or
inspections may be indicated depending upon the photodynamic agent used, agent
dose, skin condition, total exposure time or other factors. Use multiple sensor sites.
WARNING
Optical cross
-
talk can occur when two or more sensors are placed in close proximity.
It can be eliminated by covering each site with opaque material. Optical cross-talk
may adversely affect the accuracy of the SpO
2
readings.
WARNING
Obstructions or dirt on the sensor’s red light or detector may cause a sensor failure
or inaccurate readings. Make sure there are no obstructions and the sensor is clean.
WARNING
Under certain clinical conditions, pulse oximeters may not display SpO
2
and/or pulse
rate values. Under these conditions, pulse oximeters may also display erroneous
values. These conditions include, but are not limited to: patient motion, low
perfusion, cardiac arrhythmias, high or low pulse rates or a combination of the above
conditions. Failure of the clinician to recognize the effects of these conditions on
pulse oximeter readings may result in patient injury.