Care, Maintenance, and Tests
280
The ventilator will automatically terminate the hold maneuver if the
pressure continues to rise once the exhalation valve is closed (signifying a
patient is trying to breathe against the exhalation valve). Similarly the
ventilator will also abort the maneuver if a stable plateau pressure is not
reached during the hold maneuver. The maximum time that the ventilator
will hold the exhalation valve closed for is from 1 to 3 seconds depending
on the patient’s tidal volume (See Table F.2.3.1)
If the Hold button is pressed again or pressing the Clear button during
the maneuver, the hold maneuver will be terminated.
During either inspiratory or expiratory hold maneuvers, the ventilator
will not do either a purge of the flow sensor lines, or a zeroing of the flow
sensor reading.
The duration of the inspiratory hold is dependent on the Tidal Volume of
the patient. It is set according to the table below.
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