8 - 4
◆
Hypotension
◆
Darkly pigmented skin
◆
Shock
◆
Severe vasoconstriction
◆
Hypothermia
◆
Severe anemia
◆
Ventricular septal defects (VSDs)
◆
Venous pulsations
◆
Poor perfusion
◆
Dysfunctional hemoglobin, such as carboxyhemoglobin (COHb) and
methemoglobin (MetHb)
◆
Elevated levels of bilirubin
◆
Vasospastic disease, such as Raynaud’s, and peripheral vascular disease
◆
Hemoglobinopathies and synthesis disorders such as thalassemias, Hb s, Hb
c, sickle cell, etc.
◆
Hypocapnic or hypercapnic conditions
◆
Birthmark(s), tattoos, skin discolorations, moisture on skin, deformed or
abnormal fingers. etc.
■
Interfering substances:
◆
Intravascular dyes (such as indocyanine green, methylene blue, indigo
carmine, etc.)
◆
Dyes in the measure site, such as nail polish.
■
Environmental conditions:
◆
Excessive ambient light
◆
Electrosurgery equipment
◆
Defibrillation (may cause inaccurate reading for a short amount of time)
◆
Excessive patient/sensor motion
◆
Electromagnetic field
◆
Arterial catheters and intra-aortic balloon
■
Others
◆
Inappropriate positioning of the SpO
2
sensor, or use of incorrect SpO
2
sensor
◆
Cuff or arterial blood pressure measurement device on the same limb as the
SpO
2
sensor.
Summary of Contents for VS 8A
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