Airon pNeuton A, Operator'S Manual

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pNeuton Ventilator 7 - 3
Tidal Volume and Rate Control System
pNeuton’s Tidal Volume and Respiratory Rate controls
function to determine mandatory breath inspiratory and
expiratory time.
Since the ventilator provides a fixed flow (at 36 L/min or
600 ml/sec) during a mandatory breath, setting a specific
inspiratory time also sets a specific tidal volume. This tidal
volume is so precise that the inspiratory time control is
calibrated to reflect the range of tidal volumes available
(360 to 1,500 ml).
The ventilator's tidal volume output will not change in the
face of increasing patient circuit pressure. The only
change that may occur to actual patient delivered tidal
volume will be caused by compression of gas based upon
the compliance of the patient circuit used. The
compression volume of the ventilator itself is negligible.
With the Airon Corporation disposable patient circuit (part
number 58001), the following tidal volume / patient circuit
pressure relationships can be expected:
Patient Pressure Tidal Volume
360 ml 800 ml 1200 ml
5 cm H
2
O 360 800 1,200
15 cm H
2
O 350 785 1,180
30 cm H
2
O 340 775 1,165
60 cm H
2
O 320 750 1,145
The Respiratory Rate control adjusts expiratory time with a
range 0.6 to 20 seconds. Rate is controlled by increasing
or decreasing expiratory time. With a set tidal volume a
slower respiratory rate will equate to a longer expiratory
time. Tidal volume is not affected by changes to the
Respiratory Rate control.
The Respiratory Rate control is calibrated for set tidal
volumes between 500 and 900 ml. The calibrated