Operator's Manual

Chapter 6 Taking medical readings
Tempus Pro User/Operator Manual - 41-2001EN-00 – Page 92
WARNING

Inaccurate SpHb and SpOC readings may be caused by:
o Improper sensor application
o Intravascular dyes such as indocyanine green or methylene blue
o Externally applied coloring and texture such as nail polish, acrylic nails, glitter, etc.
o Elevated PaO2 levels
o Elevated levels of bilirubin
o Low arterial perfusion
o Motion artifact
o Low arterial oxygen saturation levels
o Elevated carboxyhemoglobin levels
o Elevated methemoglobin levels
o Hemoglobinopathies and synthesis disorders such as thalassemias, Hb s, Hb c,
sickle cell, etc.
o Vasospastic disease such as Raynaud's
o Elevated altitude
o Peripheral vascular disease
o Liver disease
o EMI radiation interference
 Inaccurate SpO2 readings may be caused by:
o Improper sensor application and placement
o Elevated levels of COHb or MetHb: High levels of COHb or MetHb may occur with
a seemingly normal SpO2. When elevated levels of COHb or MetHb are
suspected, laboratory analysis (CO-Oximetry) of a blood sample should be
performed.
o Elevated levels of bilirubin
o Elevated levels of dyshemoglobin
o Vasospastic disease, such as Raynaud’s, and peripheral vascular disease
o Hemoglobinopathies and synthesis disorders such as thalassemias, Hb s, Hb c,
sickle cell, etc.
o Hypocapnic or hypercapnic conditions
o Severe anemia
o Very low arterial perfusion
o Extreme motion artifact
o Abnormal venous pulsation or venous constriction
o Severe vasoconstriction or hypothermia
o Arterial catheters and intra-aortic balloon
o Intravascular dyes, such as indocyanine green or methylene blue
o Externally applied coloring and texture, such as nail polish, acrylic nails, glitter, etc.
o Birthmark(s), tattoos, skin discolorations, moisture on skin, deformed or abnormal
fingers. etc.
o Skin color disorders