Airon pNeuton A, Operator'S Manual

Page: 26 / 64

pNeuton Ventilator 4 - 4
Interrelationship of Volume and Rate Controls
There is an interrelationship between the Tidal Volume
control and the Respiratory Rate control which must be
considered while operating this ventilator. The Tidal
Volume control is a calibrated control and will not vary from
its setting during normal operation. It will not change if the
Respiratory Rate control is changed. The Respiratory
Rate control is calibrated and will not vary the patient's
mandatory breath rate unless changed. However, if the
Tidal Volume control setting is changed the actual
respiratory rate may change even if the Respiratory Rate
control is not moved.
The ventilator operational characteristics define the reason
the rate changes when the tidal volume is changed. See
Section 7 for a detailed description of the ventilator's
Theory of Operation.
The Respiratory Rate control is calibrated for tidal volumes
between 500 to 900 ml. This allows the rate control to be
preset with initial set-up of the ventilator on a patient.
Always count the patient's mandatory breath rate when
first setting up the ventilator and after any changes to the
tidal volume to assure the patient is receiving the proper
respiratory rate.
The mandatory breath inspiratory flow is fixed at 36 L/min.
Due to this preset flow rate, it is possible that desired
combinations of high tidal volume and respiratory rates
may not be available. In other words, combinations of high
tidal volumes and high mandatory breath rates are limited
by the fixed mandatory breath flow rate. If a high
respiratory rate is required, a lower tidal volume may be
necessary. Likewise, if a high tidal volume is required, a
lower respiratory rate may be needed.