CAE Athena - Ph Shift; Positive End Expiratory Pressure (PEEP); O2 Consumption; CO2 Production Factor

Müse Parameter Descriptions
208
CAEAthena
PN: 905K520652 v2.8
pH Shift
The pH Shift parameter is used to create a metabolic acidosis or metabolic alkalosis under script
control.
The default pH value displayed on the Patient Status Display or TouchPro software is dependent on
respiratory arterial CO
2
values. Under default conditions (PaCO
2
= 40 mmHg), the pH is
approximately 7.4. Rising arterial CO
2
produces a subsequent drop in pH, while falling arterial CO
2
levels result in rising pH values.
To simulate pH changes with metabolic changes (acidosis or alkalosis), the pH Shift value is a
mathematical addition to (or subtraction) from the displayed pH value to that which is desired.
Default: 0
Range: -(0.50) - 0.50
Positive End Expiratory Pressure (PEEP)
The PEEP parameter specifies the amount of positive end expiratory pressure applied during
mechanical ventilation. Setting this parameter results in clinically appropriate intrathoracic pressures
and hemodynamic responses.
Default: 0.0 cmH
2
O
Range: 0.0 cmH
2
O - 25.0 cmH
2
O
O
2
Consumption
The O
2
Consumption parameter is used to change the rate of consumption of oxygen and
production of carbon dioxide. When O
2
Consumption is increased and used with increased Shunt
Fraction, profound levels of hypoxia can be achieved rapidly.
Default: 250 mL per minute
Range: 0 mL per minute - 2000 mL per minute
CO
2
Production Factor
The CO
2
Production Factor parameter allows for the manipulation of metabolic CO
2
production to
simulate a variety of pathophysiological conditions. CO
2
production is determined by the O
2
Consumption and Respiratory Quotient settings. A CO
2
Production Factor value of 2 doubles the
CO
2
production, while a value of 0.5 decreases the CO
2
production by 50%.
Default: 1
Range: 0.50 - 4.00