AVEA ventilator quick tips
Critical care ventilation
A. Main: Returns the display to the main screen.
B. Event: Select events to record to trends.
C. Alarm silence: 2 minute silence period.
D. Suction: 3 functions:
1. ↑O2 maneuver for 2 minutes.
2. Disables demand flow on loss of PEEP.
3. Alarms silenced for 2 minutes.
E. Nebulizer: 20 minutes, synchronized with inspiration.
The AVEA ventilator’s quick tips card is not intended as a replacement for the
You must become completely familiar with the operator’s manual before using
the AVEA ventilator.
Touch-Turn-Touch™ and Touch-Turn-Accept™ method
1. Touch the control to select. The control changes
color indicating that it is active.
2. Turn the data dial to reach the selected value.
3. Touch the control again or press ACCEPT to
confirm the change.
Setting alarm limits
1. Press the ALARM LIMITS button to open or
close the window.
2. Use Touch-Turn-Touch or
method to modify alarms.
Proximal flow sensors
The AVEA ventilator accepts either hot wire or variable orifice proximal low
sensors. These are in addition to the internal inspiratory flow sensor and heated
expiratory flow sensor.
The variable orifice sensor attaches to the receptacle
circled in dark blue.
The hot wire flow sensor attaches to the receptacle
circled in light blue directly below the variable orifice
flow sensor connection.
To attach, pull back the locking collar. Push firmly onto the receptacle. Push the
collar forward to lock the sensor in place.
To disconnect, retract the collar and pull the connector straight
away from the ventilator.
Monitors and definitions
Exhaled tidal volume.
Exhaled tidal volume adjusted for patient weight.
Inspired tidal volume.
Inspired tidal volume adjusted for patient weight.
Spontaneous tidal volume.
Spontaneous tidal volume adjusted for patient weight.
Mandatory tidal volume: Displayed as a rolling average of either
8 breaths or one minute, whichever occurs first.
Mandatory tidal volume adjusted for patient weight.
Delivered machine volume measured by the ventilator’s inspiratory
Percent leakage: The difference between the inspired and exhaled
tidal volumes in terms of % difference.
Minute volume. Volume of gas exhaled by the patient during the
Minute volume adjusted for patient weight.
Spontaneous minute volume.
Spontaneous minute volume adjusted for patient weight.
Spontaneous breath rate.
Note: Not active for demand breaths.
Rapid shallow breathing index.
Peak inspiratory pressure.
Note: Not active with spontaneous breaths.
Mean airway pressure.
Plateau pressure. If no plateau occurs, then the monitor displays.***
Positive end expiratory pressure.
Air inlet gas supply pressure.
Oxygen inlet gas supply pressure.
Gas composition monitors
Delivered percent O2 .
Dynamic compliance (CDYN and CDYN/Kg), absolute and
normalized to patient weight.
Monitors and definitions (continued)
Respiratory system compliance (C RS ), (a.k.a. static compliance
Cstat), absolute and normalized to patient weight.
Note: This requires an Inspiratory Hold maneuver.
Peak inspiratory flow rate.
Peak expiratory flow rate.
The ratio of the tidal volume (exhaled) to the delta esophageal
Pressure (dPES ). Requires an esophageal balloon.
C 20 / C
The ratio of the tidal volume (exhaled) to the delta
transpulmonary pressure. The delta transpulmonary pressure
is the difference between the airway plateau pressure (during
an inspiratory pause) and esophageal pressure (at the time
the airway plateau pressure is measured) minus the difference
between the airway and esophageal baseline pressures. Requires
an inspiratory hold and esophageal balloon.
The ratio of the dynamic compliance during the last 20% of
inspiration (C 20 ) to the total dynamic compliance (C).
The total resistance during the inspiratory phase of a breath.
Respiratory system resistance is the ratio of the airway pressure
differential (peak–plateau) to the inspiratory flow 12 ms prior to
the end of inspiration. Requires an inspiratory hold.
The peak expiratory resistance (R PEAK ) is defined as the resistance
at the time of the peak expiratory flow (PEFR).
The airway resistance between the wye of the patient circuit
and the tracheal sensor. Requires an inspiratory hold and
The ratio of the tracheal pressure differential (peak–plateau) to
the inspiratory flow 12 ms prior to the end of inspiration. Requires
an inspiratory hold and tracheal catheter.
The difference between peak airway pressure (P PEAK AW ) and baseline airway pressure (PEEPAW ).
The difference between peak esophageal pressure (PPEAK ES ) and
baseline esophageal pressure (PEEPES ).
The airway pressure at the end of an expiratory hold maneuver.
Requires a passive patient.
The difference between airway pressure at the end of an
expiratory hold maneuver and the airway pressure at the start of
the next scheduled breath after the expiratory hold maneuver.
Requires a passive patient.
The difference between esophageal pressure measured at the end
of exhalation (PEEPES ) minus the esophageal pressure measured at
the start of a patient-initiated breath (PES start ) and the sensitivity of
the ventilator’s demand system. The sensitivity of the ventilator’s
demand system is the difference between the baseline airway
pressure (PEEPAW ) and the airway pressure when the patient
initiates a breath (PAW start). Requires an esophageal balloon.
Transpulmonary pressure during an inspiratory hold, which is the
difference between the airway plateau pressure (PPLAT AW ) and the
corresponding esophageal pressure. Requires an inspiratory hold
and esophageal balloon.
Monitors and definitions (continued)
The difference between the corresponding airway and esophageal
pressures at the end of the expiratory hold during
an AutoPEEP maneuver. Requires an inspiratory hold and
The maximum negative airway pressure that is achieved by the
patient, during an expiratory hold maneuver.
The negative pressure that occurs 100 ms after an inspiratory
effort has been detected.
Ventilator work of breathing (WOBV ) is defined as the summation
of airway pressure (PAW) minus the baseline airway pressure
(PEEPAW) times the change in tidal volume to the patient (-V)
during inspiration, and normalized to the total inspiratory tidal
Patient work of breathing (WOB P ), normalized to the total
inspiratory tidal volume. Patient work of breathing is defined as
the summation of two work components: Work of the lung and
work of the chest wall. Requires an esophageal balloon.
Imposed work of breathing (WOBI) is defined as the work
performed by the patient to breathe spontaneously through the
breathing apparatus, (i.e., the E.T. tube), the breathing circuit and
the demand flow system. Requires a tracheal catheter.
Note: Monitored values are displayed as BTPS.
The patient’s peak expired CO2 as measured and reported by the
CO2 sensor in the airway, calculated for each breath then averaged
as specified by set EtCO2 averaging time.
Minute volume of exhaled CO2 measured continuously and
averaged over a user-selectable time. Requires flow measurement
at the wye or circuit compliance active.
Tidal volume of exhaled CO2 , measured for each breath and then
averaged over the set VCO2 averaging time. Requires flow measurement at the wye or circuit compliance active.
The volume of dead space in the patient’s conducting airways
from the nose to the level of the terminal bronchioles measured
for each breath, then averaged over the set CO2 averaging time.
Also includes any mechanical dead spaces added to the ventilator circuit between the CO2 sensor and the patient. Requires flow
measurement at the wye or circuit compliance active.
Anatomic Vd/Vt is averaged over the set VCO2 averaging
time. Requires flow measurement at the wye or circuit
Comprises Vd ana as well as the volume of the respiratory zone
(respiratory bronchioles, alveolar ducts and alveoli) not participating in gas exchange. Requires an arterial blood gas sample.
Physiologic Vd/Vt is averaged over the set VCO2 averaging time.
Requires an arterial blood gas sample.
Alveolar dead space is the difference between physiological
dead space and anatomical dead space. It represents the volume
of the respiratory zone that is from ventilation of relative
under-perfused or non-perfused alveoli. Requires an arterial
blood gas sample.
Monitors and definitions (continued)
Alveolar ventilation is the volume of gas participating in gas
exchange per minute. Requires an arterial blood gas sample.
The PaO2 / FIO2 ratio is a simple assessment of gas exchange
calculated from the FIO2 monitor value and an arterial blood
oxygen measurement (required) entered by the clinician.
Oxygenation index is a dimensionless number often used to
assess the “pressure cost” of oxygenation calculated from the FIO2
mean airway pressure and an arterial blood oxygen measurement
(required) entered by the clinician.
* Volume guarantee breaths available for neonates
Normal values and indications for weaning (adults)
10 to 20 breaths/minute
< 30 B/min△
5 to 10 cmH2O
< 15 cmH2O
7 to 10 mL/kg
> 5 mL/kg△
5 to 10 Liters/min
< 10 L/min
3 to 0.6 Joules/Liter
< 0.75 J/L △
Pressure time index
0.05 to 0.12
< 0.15 △
2 to 5 cmH2O/L/s
< 15 cmH2O/L/s
50 to 100 mL/cmH2O
> 25 mL/cmH2O
-30 cmH2O low effort
> -20 cmH2O△
-140 cmH2O high effort
< 3 cmH2O
Respiratory drive P0.1
2 to 4 cmH2O
< 6 cmH2O△
60 to 90
200 to 300 cmH2O sec/min
0.3 to 0.4
> 90% on FlO2 of < 40%
P(A - a) O2 on
FlO2 of 100%
< 350 mmHg
> 200 mmHg
> 70 and < 120 bpm
Mean blood pressure
> 70 and < 110 mmHg
Note: Research indicates these pulmonary parameters may aid qualified medical
personnel in evaluating weaning potential. If measured values exceed acceptable
range, successful weaning may be less likely. Ranges from these parameters are not
intended as a substitute for clinical assessment by qualified medical personnel and
CareFusion assumes no liability for their use in patient care. A list of references is
available upon request.
© 2011 CareFusion Corporation or one of its subsidiaries.
All rights reserved. AVEA, Touch-Turn-Accept and TouchTurn-Touch are trademarks or registered trademarks of
CareFusion Corporation or one of its subsidiaries.
RC2236 (0511/2000) L3059 Rev. B
22745 Savi Ranch Parkway
Yorba Linda, CA 92887
Yorba Linda, CA
CareFusion Germany 234 GmbH
+49 931 4972-0 tel
+49 931 4972-423 fax