CareFusion AVEA - Alarms; Chest Wall Compliance (C Cw); To Perform Esophageal Maneuvers

AVEA ventilator systems Chapter 4: Monitors, Displays and Maneuvers 113
L2786 Rev. M
Chest wall Compliance (C
CW
)
The preset Chest wall Compliance (C
CW
) is used by the ventilator to calculate work of
breathing.
Range: 0 to 300 mL/cmH
2
O
Resolution: 1 mL/cmH
2
O
Default: 200 mL/cmH
2
O
Alarms
All currently available alarms are active during the Esophageal maneuver.
To Perform Esophageal Maneuvers
Esophageal measurements require the use of an esophageal balloon, which can be purchased from CareFusion.
From the Maneuvers Screen menu select Esophageal
Before placing the balloon in the patient a balloon test should be performed. Connect the esophageal balloon
extension tubing to the EPM panel on the AVEA as described in Chapter 2. Remove the new esophageal balloon from
its package and connect it to the pinned connector on the patient end of the extension tubing.
Allow the balloon to hang freely and not contact any surfaces and press the Balloon Test soft key on the maneuver
screen. The ventilator will perform a leak test by evacuating the balloon, filling it to the proper specification, measuring
the balloon pressure and finally evacuating the balloon. A message will appear on the message bar after the test stating
Pass or Fail.
In the event that the balloon does not pass the leak test, inspect the balloon for damage and replace if necessary. If no
damage is present on the balloon check all connectors on the balloon and extension tubing and repeat the test.
Note:
Disconnecting the balloon after passing a balloon test will require that the test be repeated.
Once the balloon has passed the leak test it is ready for placement in the patient. Proper placement of the balloon is
imperative for accurate measurements. During insertion the waveform produced can provide information to confirm
proper placement. An approximate level of placement can be made by measuring the distance from the tip of the nose
to the bottom of the earlobe and then from the earlobe to the distal tip of the xiphoid process.
1. The esophageal pressure waveform correlates to the airway pressure in that they become positive during a
positive pressure breath and negative during a spontaneous breath.
2. The esophageal tracing may show small cardiac oscillations reflective of cardiac activity.