Puritan Bennett 560 Ventilator User's Manual - Covidien

Installation and Assembly
• Connected to the FROM PATIENT port:
This filter protects the internal exhalation flow sensor from the gases exhaled by the patient.
Refer to Figure 4-8, item 10.
Figure 4-12. Bacteria Filter
Refer to the manufacturer’s instructions for more information about the use and maintenance of the bacteria
filter(s).
4.6 Humidifier
The humidifier (Figure 4-13) adds moisture (water vapour) and warms the gas in the patient circuit. It is
inserted into the patient circuit between the main outlet and the patient (refer to Figure 4-7 and Figure 4-8).
Warning
During invasive ventilation (when an artificial airway bypasses the patient’s upper respiratory
system), the patient’s upper respiratory system cannot humidify the incoming gas. For this
reason, the use of a humidifier, to minimise drying of the patient’s airways and subsequent
irritation and discomfort, must be used.
Always position a humidification device so that it is lower than both the ventilator and the
patient. Use water traps, if necessary, to limit water in the patient circuit and periodically empty
these water traps.
If a heated humidifier is used, you should always monitor the temperature of the gas delivered
to the patient. Gas delivered from the ventilator that becomes too hot may burn the patient's
airway.
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.
Figure 4-13. Humidifier
When a humidification device is used, any condensation that forms in the patient circuit is collected in the
4-12 User’s Manual