Installation and Assembly
4-12
Puritan Bennett 540™ Ventilator User’s Manual
Figure 4-12.
Humidifier
When a humidification device is used, any condensation that forms in the patient circuit is collected in
the water trap. If you notice any moisture in the patient circuit, you need to replace the wet circuit
components with dry ones.
Refer to the humidification device’s instruction for information on operating, cleaning, and sterilizing
the humidifier.
4.7
Exhalation Block
WARNING
•
During invasive ventilation, the patient’s upper airways may become dry and irritated, causing
discomfort. For this reason, the use of a humidifier is strongly recommended.
•
Always position any humidification device so that it is at a lower height than both the ventilator and the
patient. Use water traps, if necessary, to limit water flow towards the ventilator and the patient and
periodically empty these water traps.
•
If a heated humidifier is used, you should always monitor the temperature of the air delivered to the
patient. Air that becomes too hot may burn the patient’s airway.
•
Consult with your Customer Support representative before attempting to use a heated humidifier.
•
Adding accessories to the ventilator breathing circuit, such as a humidifier and water trap(s), may result
in a decrease in tidal volume delivered to the patient due to the added compressible volume of the
accessory. Always assure that the patient is receiving the appropriate inspired volume when altering
the breathing circuit configuration.
WARNING
•
The exhalation block is for single use by a single patient:
. It may be periodically cleaned, but it
cannot be disinfected or sterilized. To maintain good measurement quality when the ventilator is in
continuous use change it every three months.
•
Each time an exhalation block is installed, the expiratory flow sensor must be recalibrated before using
the ventilator.
Caution
Ensure that the exhalation block has been completely dried after it is cleaned.
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