GE CARESCAPE ONE User Manual page 135

CARESCAPE ONE User Manual DRAFT 26 October 2017
WARNING
2094480-001
Many factors may cause inaccurate readings and alarms,
decreased perfusion, and or low signal strength:
Interfering substances:
●
Carboxyhemoglobin may erroneously increase SpO
￭
reading.
Methemoglobin (MetHb) usually represents less than 1%
￭
of the total Hb, but in the case of methemoglobinemia
that can be congenital or induced by some IV dyes,
antibiotics (such as sulphas), inhaled gases, etc., this
level increases sharply and thus can cause inaccuracies
in the SpO reading.
2
Intravascular dyes (such as indocyanine green,
￭
methylene blue, etc.)
Physiological characteristics:
●
Cardiac arrest
￭
Hypotension
￭
Shock
￭
Severe vasoconstriction
￭
Severe anemia
￭
Hypothermia
￭
Venous pulsations
￭
Darkly pigmented skin
￭
Ventricular septal defects (VSDs)
￭
Nail polish or artificial nails at the measurement site
￭
Environmental conditions:
●
Electromagnetic interference
￭
Excessive ambient light
￭
Electrical interference
￭
Electrosurgery
￭
Defibrillation - May cause inaccurate reading for a short
￭
amount of time.
Excessive patient/sensor motion. Artifact can simulate
￭
an SpO reading, so that the device fails to sound an
2
alarm. In order to ensure reliable patient monitoring, the
proper application of the probe and the signal quality
must be checked at regular intervals.
Sensor placement:
●
Incorrect sensor placement - prolonged monitoring or
￭
incorrect sensor application can cause skin irritation or
impaired circulation. It is recommended that you check
the probe site every four hours (more frequently for poor
perfusion or for neonates). Refer to the instructions
supplied with the sensor.
Sensor placement on the same extremity as a blood
￭
pressure cuff, arterial catheter or intravascular line; or
arterial occlusion proximal to the sensor.
CARESCAPE ONE
SpO₂
2
135