Monitor mode - SpO
2
12
Physics principle used
The CardioMax measures oxygen saturation on arterial blood by the passage of two
light wavelengths through the body tissue, a red one and an infrared one which are
detected by a photo-sensor.
The oximeter processes these signals, separating invariable parameters (thickness
of tissue, skin color, light intensity and venous blood) from the variable parameters
(arterial volume and SpO
2
) in order to identify pulse frequency and calculate oxygen
saturation. Calculation of oxygen saturation is precise due to the fact that blood
saturated with oxygen absorbs less red light than blood with less oxygen.
The CardioMax measures functional saturation, not detecting significant quantities
of dysfunctional hemoglobins, such as carboxyhemoglobin or methemoglobin.
Warnings
Use only original SpO
2
sensors manufactured by Instramed. Other sensors
may cause inadequate performance.
If you suspect a cable or conductor is ruptured, avoid using the equipment
due to possible risk to the operator.
Before using the sensor carefully read instructions which accompany it.
Do not wet the SpO
2
sensor.
When handling the SpO
2
cable, be careful not to strangle the patient.
The SpO
2
sensor should be repositioned every 4 hours, alternating its
location.
Any condition that may restrict blood circulation, such as the armband of
the arterial pressure device or extremes of systemic vascular resistance may
affect the precision of the pulse frequency and SpO
2
readings.
Position the SPO
2
sensor so that the cable rests against the palm of your
hand. This places the light source on the side of the nail and the detector on
the underside of the finger.
Remove nail polish, or artificial nails, if present.
The presence of too much ambient light may affect the operation of the
sensor. In this case, block sunlight (with a surgical towel) if necessary.
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