iVent201 Operator's Manual
251
Appendix C: Operating
Theory
The iVent
201
is a positive pressure mechanical ventilator. This appendix describes the
ventilator’s components and depicts a schematic flow of the electro-pneumatic system.
The function of each component is described below.
C.1 Ambient Air Filter
Air is drawn from the external environment through this filter. The filter captures
particles greater than 5 microns with an efficiency of 99.0%.
C.2 CBRN Filter (optional)
An optional configuration enables air to be drawn in through a Chemical, Biological,
Radiological, and Nuclear (CBRN) filter.
C.3 Low Pressure O
2
Adapter and Filter (optional)
An optional configuration that enables the usage of low pressure O
2
sources, such as
concentrators, to provide O
2
enrichment.
C.4 Air/Oxygen Blending System
The blending system consists of a proportional air entrainment port and a PSV High
Pressure O2 Enrichment Valve. The ventilator software controls both the port and PSV
account for variations in the inspired flow to achieve the desired oxygen concentration.
C.5 Inlet Manifold
The inlet manifold houses the air entrainment port, demand valve, and fail-safe bypass
port.
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