ResMed lumis series Clinical Guide

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Target alveolar ventilation
iVAPS targets alveolar ventilation. Alveolar ventilation was chosen because gas exchange occurs at
the alveoli level. Total ventilation includes the ventilation devoted to the conducting airways,
whereas alveolar ventilation best represents the useful portion of ventilation that reaches the alveoli.
Alveolar ventilation cannot be measured directly, so iVAPS estimates it using a height approximated
value of anatomical deadspace as shown in the graph below. Anatomic deadspace is the amount of
breath that remains in the conducting airways, that does not reach alveoli and does not contribute to
gas exchange. Its contribution is proportional to breath rate. By using alveolar ventilation as a servo-
ventilation target, as opposed to tidal volume or minute ventilation, the effect of respiratory rate
change on effective ventilation is negated.

ResMed lumis series Specifications

General

Device Type	Non-invasive ventilator
Pressure Range	4-25 cm H2O
Modes	CPAP, S, ST, T, iVAPS
Ramp Time	0-45 minutes
Humidification	Integrated heated humidifier
Data Storage	SD card
Power Supply	AC 100-240V, 50-60Hz
Weight	1.3 kg
Operating Altitude	Up to 2, 591 m
Heated Tubing	Compatible with ClimateLineAir heated tubing
Connectivity	Bluetooth
Display	LCD