CAE Healthcare Fidelis Lucina, User Manual

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Müse Parameter Descriptions
279
Respiratory Rate Factor
The Respiratory Rate Factor parameter (along with the Tidal Volume Factor parameter) is used to
change the baseline respiratory rate (before the control-of-breathing and drug influences are taken
into account). A value of 2 doubles the baseline respiratory rate. A value of 0.5 decreases the baseline
respiratory rate by 50%. Changing the respiratory rate using this parameter maintains the physiological
models.
Default : 1
Range : 0.01 - 6.00
TIP : First decrease the respiratory gain factor to reduce the influence of the respiratory control
mechanism on the respiratory rate and tidal volume.
Shunt Fraction
The Shunt Fraction parameter is frequently used to assist in desaturating a patient. This parameter
creates a physiologic “bypass” of the normal pulmonary circulation, resulting in changes in O
2
, CO
2
and
anesthetic gases at the alveolar level. Typically, values of 0.1 to 0.4 are needed to create large alveolar-
arterial oxygen gradients sufficient to cause arterial hypoxemia.
Default : 0.02
Range : 0.00 - 0.50
TIP : If the parameter is set high (0.5), the patient desaturates rapidly and responds negatively to the
administration of supplemental O
2
.
SpO
2
The SpO
2
parameter is used to override the normal pulmonary circulation and set the SpO
2
at a fixed
numeric value, regardless of the oxygen applied. Resetting to Modeled returns control of the
underlying SpO
2
to the physiological models. If SpO
2
is set to less than 75%, the eyes will automatically
close when in the Auto mode.
Default: Modeled
Range: 0% - 100%