CAE Healthcare Fidelis Lucina, User Manual

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Müse Parameter Descriptions
286
Respiratory Gain Factor
The Respiratory Gain Factor determines how strong an influence arterial CO
2
levels have on the
simulated patient’s tidal volume and respiratory rate. Under default conditions (value = 1), when
arterial CO
2
levels rise, the patient’s respiratory rate and tidal volume show a transitory increase in an
attempt to return the patient to the physiological control CO
2
set-point. If the Respiratory Gain Factor
is increased to more than 1, the patient has a more pronounced response, while values less than 1
correspond to a blunted response.
Default : 1
Range : 0.00 - 10.00
Respiratory Quotient
Respiratory Quotient is the rate of carbon dioxide production divided by the rate of oxygen
consumption. Changes to the Respiratory Quotient parameter alter the rate of carbon dioxide
production relative to the rate of oxygen consumption.
Default : 0.8
Range : 0.70 - 1.10
Volume/Rate Control Factor
Ventilatory responses to increased arterial carbon dioxide or decreased arterial oxygen may take the
form of increased tidal volume, increased respiratory rate, or both. The Volume/Rate Control Factor
determines these relative changes. At a value of 1, increased and decreased ventilatory drive affect tidal
volume and respiratory rate equally. When the
Volume/Rate Control Factor is greater than 1,
increased or decreased minute ventilation is predominantly achieved by changes in tidal volume.
When the Volume/Rate Control Factor is less than 1, ventilatory changes are affected primarily by
changes in respiratory rate.
For example, set the Volume/Rate Control Factor to 0.1 and increase the shunt fraction to 0.4 to
decrease the arterial O
2
. The patient responds to falling arterial oxygen levels with increased minute
ventilation. Increasing the respiratory rate with minimal increase in tidal volume produces this.
Default : 1
Range : 0.1 - 10.0
Chest Wall Capacity
The Chest Wall Capacity parameter sets the total (combined) intrapleural and lung volumes at which
the chest wall is considered distended. Also, see Chest Wall Compliance Factor and Distended Chest
Wall Compliance Factor .
Default : 3900
Range : 1500 - 3900