Getinge Maquet FLOW-i 4.2 User Manual page 114

| 5 | System functionality
5.7 Inspiratory and expiratory hold
Using the inspiratory and expiratory hold
function enables certain lung characteristics
e.g. static compliance and total PEEP to be
estimated.
This is achieved by closing the inspiratory and
expiratory valves immediately at the end of an
inspiration or an expiration. The system then
proceeds to estimate the specified metrics for
as long as the valves are closed.
The valves remain closed the whole time the
touch pad is pressed down. Ventilation
resumes as before when pressure is removed.
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Measurements start at the end of
expiration/inspiration irrespective of the time
when the touch pad was pressed down. If
'Insp. hold' is pressed down in-between
breaths, the actual function will not initiate until
the flow of gas into the lungs stops. If the
respiratory rate is low, this intermediate time
could be several seconds.
To get accurate estimates of metrics, it is
usually sufficient to keep the touch pad
pressed down for the equivalent of a complete
breathing cycle (a few cycles if the respiratory
rate is high).
The time of the last performed measurement
is displayed below each estimated parameter.
All alarms will be muted for 60 seconds when
either insp/exp hold is used.
FLOW-i 4.2, User's Manual