Operator’s Manual LTV
®
Series ventilator Page F-1
p/n 10664, Rev. Y
Appendix F -
G
LOSSARY
TERM DEFINITION
AC
Alternating Current.
Airway circuit
The airway tubing that connects the ventilator and the patient.
Airway pressure
The airway pressure measured at the exhalation valve.
Airway pressure display
A bar graph type display composed of 60 LEDs. This display shows
the real-time airway circuit pressure from –10 cmH
2
O to 108 cmH
2
O.
Alarm
An audible and visual announcement that an alarm condition has been
met. Audible notification includes an oscillating or continuous tone.
Visual notification may include flashing displays, illuminated LEDs, and
text messages shown in the display window.
Apnea
Apnea happens when the time between breath starts exceeds the set
apnea interval.
Apnea backup
ventilation
Apnea Backup Ventilation begins when an apnea alarm occurs and
continues until the patient initiates 2 consecutive breaths or the alarm
is canceled by an operator. Apnea Backup Ventilation is given in the
Assist / Control mode.
Apnea interval
The maximum period of time allowed between breath starts. If the time
between breath starts exceeds this interval, an Apnea alarm occurs.
Assist / Control mode
A mode of ventilation where the patient receives a minimum number of
machine and assist breaths. The available breath types are Volume
Control and Pressure Control.
Assist breath
A volume or pressure breath that the patient triggers, and which is
then controlled and cycled by the ventilator. Assist breaths may occur
in Assist / Control and SIMV modes.
Autozero
The procedure for determining the transducer zero offset for ambient
pressure.
Bias flow
A constant stream of gas through the patient circuit during the
exhalation phase of the breath.
bpm
Breaths Per Minute.
Breath period
The time between consecutive ventilator started breaths. The Breath
Period is determined by the Breath Rate per minute setting. For
instance, a Breath Rate of 6 would give a Breath Period of 10 seconds
(60 seconds divided by 6 bpm).
Breath rate, set
The minimum quantity of machine breaths given in a minute.
BTPD
Body Temperature, Pressure Dry.
Circuit
See airway circuit.
Circuit pressure
See airway pressure.
cmH
2
O
Centimeters of water. A unit of measure for pressure.
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