System Setup
Instructions for Use Apollo SW 4.5n 83
Part Number: 9053586, 3rd edition
Calculating the resistance of the breathing sys-
tem and connected accessories
To keep the patients' work of breathing as low as
possible, according to ISO 8835-2 and
ISO 80601-2-13 a total inspiratory and expiratory
resistance of 6.0 hPa (cmH2O) at 60 L/min may not
be exceeded.
The "Specifications" chapter states the inspiratory
and expiratory breathing resistance of the breathing
system, not including the breathing hoses. This
allows for the calculation of the resistance of the
breathing circuit using different hose sets and/or
filters.
The following formula are used to calculate the
resistance (R):
R
Inspiration =
R
Breathingsystem_insp + RInspHose + RBagHose +
R
Insp-Filter(port) + RInspFilter(Y-piece)
RExpiration =
R
Breathingsystem_exp + RExpHose + RExpFilter(port) +
R
ExpFilter(Y-piece)
When calculating the resistance, only accessory
resistance values and peak flows must be used that
are applicable for the respective accessory category
and patient category, e.g., resistance value for adults
(60 L/min), for children (30 L/min), or for neonates
(5 L/min).
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