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Puritan Bennett 540™ Ventilator User’s Manual
F-5
Respiration rate
The number of breath cycles (inspi expiration) completed within one minute
.
Normal resting
adult respiratory rates are from 16 – 20 breaths per minute (bpm).
Rtot
Parameter measured by the ventilator equal to the total number of breaths per minute (bpm).
Volume breath
Inspiration of the selected volume, delivered over the selected inspiratory time.
Sensitivity
This adjustable parameter determines the amount of inspiratory effort required by the patient before
the ventilator delivers an assisted breath, or demands flow in the case of a spontaneous breath.
The Puritan Bennett 540™ Ventilator is flow-triggered, with sensitivity levels in the range from 1 to 5:
the lower the number, the more sensitive the trigger.
Spontaneous
A ventilation mode that delivers assisted breaths only. Spontaneous mode does not provide breaths if
the patient does not make an inspiratory effort greater than the sensitivity settings and there is no
apnea backup rate.
Standby
The operational mode of the ventilator where it is powered (power supply
I/O
button set to the
I
position), but is not ventilating the patient.
Synchronous Intermittent Mandatory Ventilation (SIMV)
A ventilator mode which provides a mechanism for synchronizing the ventilator-delivered breaths
with a patient's inspiration, as detected by the ventilator.
Tidal volume (Vt)
Volume of gas delivered to the patient in a breath.
Unfreeze
Resumption of the waveform plot tracing on the ventilator’s display.
Summary of Contents for Puritan Bennett 540
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