Page F-2 LTV
®
Series ventilator Operator’s Manual
p/n 10664, Rev. Y
TERM DEFINITION
Control mode
A ventilation mode where the ventilator delivers machine breaths at a
set rate. In Control Mode, patient triggers are not allowed.
CPAP
Continuous Positive Airway Pressure. The ventilator continuously
maintains Positive gas pressure through the patient circuit during the
entire breath cycle.
CPAP mode
A ventilation mode where the patient triggers all breaths. Available
breath types are Pressure Support and Spontaneous.
Display window
A set of 12 dot-matrix displays used to show monitored data, alarm
messages and Extended Feature menu items.
EEPROM
Electrically Erasable Programmable Read Only Memory. Nonvolatile
electronic memory that is used by the ventilator to maintain calibration
data, control setting and other data when power is not applied to the
ventilator.
Event
Any condition noted in the ventilator’s event trace. This may include
both error conditions and normal operational events.
Exhaled tidal volume
See Tidal Volume.
Expiratory hold
A maneuver which holds the expiratory phase of a delivered breath for
a duration sufficient to determine the AutoPEEP of a patient.
Extended features
A set of ventilator controls and options that are not associated with
front panel controls. Extended Features are accessed through a menu
shown in the display window.
f
See Total Breath Rate, monitored.
Flow
The velocity of gas delivery to the patient, quantified in lpm.
Flow trigger
A patient effort in which the amount of bias flow routed into the
patient’s lungs exceeds the Sensitivity setting. A flow trigger will result
in delivery of an Assist or Patient breath, according to the ventilation
mode.
I:E ratio, monitored
The ratio of the inspiration period to the expiration period for a breath.
The lesser value is normalized to 1.
I:E ratio, calculated
Calculated Inspiratory:Expiratory ratio, based upon the Inspiratory
Time setting and the Breath Rate setting
Inspiratory hold
A maneuver which holds the inspiratory phase of a volume delivered
breath for a duration sufficient to determine Δ Pres pressure and static
lung compliance of the patient.
L
Liters
Leak compensation
Leak Compensation improves triggering when a circuit leak is present.
LED
Light Emitting Diode. An indicator that is illuminated on the front panel.
lpm
Liters Per Minute. Flow rate.
Machine breath
A volume or pressure breath that is started by the operator or the
ventilator, and is controlled and cycled by the ventilator. Machine
Breaths may occur in Control and Assist / Control modes. The
operator may cause a machine breath in any mode using the Manual
Breath Button.
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