Setting Up Tone Modulation
If tone modulation is on, the QRS tone pitch lowers when the SpO
tone is derived from either heart rate or pulse depending on which is currently selected as the active
Tone modulation is licensed under US patent US 4.653.498 from Nellcor Puritan Bennett
Setting the QRS Volume
Calculating SpO2 Difference
When a second SpO
device), the monitor displays both SpO
second value is subtracted from the first.
Choose the first measurement source.
Choose the second measurement source.
measurement is present (either through the SpO
to switch between
and set the appropriate QRS tone volume.
values, and calculates the difference between them. The
9 Monitoring SpO2
level drops. Remember, the QRS
(for on) and
module or through an external