Appendix A: Definitions
84
Parameter Definition
Resp. rate Respiratory rate (Resp. rate) is the number of breaths per minute averaged over the last
eight breaths.
The measured Resp. rate is displayed as a monitored parameter during ventilation.
RSBI Rapid Shallow Breathing Index (RSBI) is calculated by dividing the breath rate by Tidal
Volume.
The measured RSBI is displayed as a monitored parameter during ventilation.
SpO
2
The measured functional Oxygen Saturation (SpO
2
) is displayed as a monitored
parameter when a pulse oximeter is used.
Te Expiratory time Te is the period in seconds of the last expiratory phase.
Ti Inspiratory time Ti is the period in seconds of the last inspiratory phase.
The measured Ti is displayed as a monitored parameter during ventilation.
The expected Ti is calculated and displayed for volume controlled breaths on the settings
screens when the Inspiratory Phase Duration Option is set to PIF.
Va Alveolar Minute Ventilation (Va) is calculated by (Tidal Volume - Deadspace) x Resp.
Rate.
The measured Va is shown as a monitored parameter during ventilation.
Vte Expiratory Tidal Volume (Vte) is the volume expired during the last breath.
The measured Vte is displayed as a monitored parameter during ventilation.
Vti Inspiratory Tidal Volume (VTi) is the volume inspired during the last breath.
The measured VTi is displayed as a monitored parameter during ventilation.
Average Vt Average Tidal Volume (Average Vt) is the average volume expired during the last five
minutes of ventilation.
The Average Vt is displayed as a calculation parameter during iVAPS configuration.
Average Vt/kg Average Tidal Volume per kg (Average Vt/kg) is the Average Vt divided by Ideal Body
Weight (IBW).
The Average Vt is displayed as a calculation parameter during iVAPS configuration.
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