Справочник Пользователя для Innokas Yhtyma Oy VC150

KO00065K

VC150 Vital Signs Monitor

7-3

: Description

Many factors may cause inaccurate readings and alarms, decreased 
perfusion, and/or low signal strength:
Interfering substances:
- Carboxyhemoglobin may erroneously increase SpO

2

 readings.

- Methemoglobin (MetHb) usually represents less than 1% of the total 
Hgb, 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. Methemoglobin may cause inaccurate 
SpO

2 

readings.

- Intravascular dyes (such as indocyanine green, methylene blue, etc.) at 
certain concentrations may cause inaccurate SpO

2

 readings and/or 

decreased perfusion and corresponding signal strength, potentially 
causing inaccurate SpO

2

 readings.

-Nail polish and artificial nails may cause inaccurate readings.
Physiological characteristics:
Some physiological characteristics may cause decreased perfusion 
and/or low signal strength and may potentially cause inaccurate SpO

2

 

readings:
- Cardiac arrest, hypotension, shock, severe vasoconstriction, severe 
anemia, hypothermia, venous pulsations, congestions, darkly 
pigmented skin, ventricular septal defects (VSDs)
Environmental conditions:
Some environmental conditions may cause interference or artifact and 
may potentially cause inaccurate SpO

2

 readings.

- Excessive ambient light sources (e.g., infrared heat lamps, strobe 
lights, bilirubin lights, direct sunlight, operating room lights). To prevent 
such interference, cover the sensor with opaque material.
- Electrical interference/Electrosurgery
- Defibrillation - May cause inaccurate reading for a short amount of 
time.
- Excessive patient/sensor motion. Artifact can simulate an SpO

2

 

reading, so that the monitor fails to sound an 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:
- Sensor placement on the same extremity as a blood pressure cuff, 
arterial catheter or intravascular line; or arterial occlusion proximal to 
the sensor; or a sensor below the heart level may cause decreased 
perfusion and/or low signal strength and potentially cause inaccurate 
SpO

2

 readings.

- Poor sensor fit may cause decreased or low signal strength and 
potentially cause inaccurate SpO

2

 readings.

- Do not allow tape to block the sensor light emitter and detector as this 
may cause decreased perfusion and/or low signal strength and 
potentially cause inaccurate SpO

2

 readings.

- Before using the GE TruSignal sensor, carefully read the GE sensor 
instructions for use.