Product Manual

Performance Considerations
70
Dysfunctional Hemoglobins
Dysfunctional hemoglobins such as carboxyhemoglobin,
methemoglobin, and sulphemoglobin are unable to carry oxygen.
SpO
2 readings may appear normal; however, a patient may be
hypoxic because less hemoglobin is available to carry oxygen. Further
assessment beyond pulse oximetry is recommended.
Anemia
Anemia causes decreased arterial oxygen content. Although SpO2
readings may appear normal, an anemic patient may be hypoxic.
Correcting anemia can improve arterial oxygen content. The pulse
oximeter may fail to provide an SpO
2 if hemoglobin levels fall below
5 gm/dl.
Saturation
The N-560 will only measure saturation levels between 1 and 100%.
Pulse rates
The N-560 will only measure pulse rates between 20 and 250 beats
per minute. Detected pulse rates outside the range of 20 to 250
beats per minute are displayed as the closest value within the range.
Sensor Performance Considerations
WARNING: Pulse oximetry readings and pulse signal can be
affected by certain ambient conditions, sensor application
errors, and certain patient conditions.
Inaccurate measurements can be caused by:
• incorrect application of the sensor
• p
lacement of the sensor on an extremity with a blood
pressure cuff, arterial catheter, or intravascular line