Covidien Puritan Bennett 560 User Manual page 142

Glossary
Rtot
Parameter measured by the ventilator equal to the total number of breaths per minute (bpm).
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™ 560 Ventilator is flow-triggered, with sensitivity levels in the range from
1 to 5: the lower the number, the more sensitive the trigger.
Sigh
A sigh is an increased volume of gas delivered to the patient at a set rate. i.e. every 50 breaths.
Spont Cyc (Spontaneous Cycling)
This is the percentage of ventilation cycles initiated by the patient over the previous 24 hour period.
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.
SIMV (Synchronised Intermittent Mandatory Ventilation)
A ventilator mode which provides a mechanism for synchronising 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.
V A/C (Volume Assist / Control)
A ventilator mode which provides machine-initiated breaths are delivered at a clinician-set volume
inspiratory time, and rate.
Vent Time (Ventilation Time)
The ventilation duration data is based on the patient counter and shows the total ventilation time
in hours and minutes over the previous 24 hour period.
Volume breath
Inspiration of the selected volume, delivered over the selected inspiratory time.
G-6
User's Manual