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56 Chapter 6 Reference Welch Allyn Micropaq Monitor
Pulse oximetry (SpO
2
) specifications - Masimo
SpO2 complies with EN ISO 9919:2005.
Characteristic Specification
Saturation (% SpO
2
)
Range
Resolution
Alarm Limits
a
With Acuity 6.0 or higher
With Acuity 5.4X or lower
a. SpO
2
alarm limit range depends on the software version of the Acuity System to which the monitor is connected.
1% to 100%
1%
50% to 99% (lower); 51% to 100% (upper)
80% to 99% (lower); 81% to 100% (upper)
Probe Accuracy (Adults, Pediatrics)
No Motion
During Motion
b
b. Motion is defined as rubbing and tapping motions at 2 to 4 Hz at an amplitude of 1 to 2 cm and a nonrepetitive motion between 1
to 5 Hz at an amplitude of 2 to 3 cm in induced hypoxia studies in the range of 70-100% SpO
2
against a laboratory co-oximeter and
ECG monitor. This variation equals ±1 standard deviation which encompasses 68% of the population.
70% to 100% ±2 counts
0% to 69% unspecified
70% to 100% ±3 counts
0% to 69% unspecified
Pulse Rate
Range
Resolution
Alarm Limits
26 to 239 beats per minute
1 beat per minute
25 to 245 beats per minute (lower)
30 to 250 beats per minute (upper)
Pulse Rate Accuracy
No Motion
During Motion
2
±3 beats per minute
±5 beats per minute
Display Update Interval at monitor 1 second
Alarm Hold-Off Time Period 10 seconds; resets if the sensor reports levels within limits before 10
seconds elapses
Circuitry Microprocessor controlled
Automatic self-test of oximeter when powered on
Automatic setting of default parameters
Automatic alarm messages
Electrosurgery interference suppression Yes
Sensor Compatibility Compatible only with Masimo sensors listed in the Micropaq monitor
section of the Welch Allyn Products and Accessories booklet (810-0409-XX).
For probe/sensor compliance to EN ISO 9919:2005, see the Masimo
directions for use.
Sensor LEDs
RED Wavelength
INFRARED Wavelength
660 nm (nominal)
905 nm (nominal)
Sensor Energies (Radiant Power) 0.13 mW to 0.79 mW at 50 mA pulsed
WARNING Interfering Substances: Carboxyhemoglobin may erroneously
increase readings. The level of increase is approximately equal to the amount of
carboxyhemoglobin present. Dyes, or any substances containing dyes, that
change usual arterial pigmentation may cause erroneous readings.
WARNING Although the SpO
2
alarm limit range can be adjusted down to 50%
saturation (with Acuity 6.0 software or higher), the SpO
2
performance and
accuracy is not specified below 70%.