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47 The use of bacterial filters between the fresh gas
port and humidifier supply line & exhalation block
and the expiratory supply line is strongly
recommended.
48 Do not allow the heated section of the patient
circuit to come into contact with the patient.
49 Do not allow heated section of the patient circuit
to become covered, i.e. by a blanket or covering.
50 Do not touch the humidifier hot plate if exposed,
as it may burn the skin when hot.
51 .Ensure the temperature probes are cleaned and
sterilized as per the manufacturers instructions.
6.1.1.3 Flow Sensor (General)
52 When using a mode with TTV
plus
ON, if the user
removes the flow sensor from the patient circuit,
to allow suctioning or re-calibration, they must
carry out one of the following actions:
A) Set the MAX PIP to the measured PIP.
or
B) Turn OFF TTV
plus
.
or
C) Use an alternative form of ventilation during
the disconnection period.
The user is required to use one of the above
actions for the following reason. With TTV
plus
ON
the ventilator is limiting the pressure to deliver
the required volume, i.e. when the set volume
has been reached the peak inspiratory pressure
(PIP) is terminated.
6.1.1.4 Flow Sensor (Reusable, N5402-REV2)
53 When carrying out ET suctioning with the
ventilator delivering high flow rates it is possible
to activate the sensor contamination alarm
inadvertently. To avoid this situation disconnect
the ET manifold first from the flow sensor, then
the flow sensor from the ET tube. It is also
important to reconnect the flow sensor and
manifold in the reverse order so as to again
avoid the contamination alarm. For more
information please refer to “Flow sensor removal
for suctioning or re-calibration, pausing
ventilation” on page 71.
54 The presence of secretion on the sensor mesh
may cause increased resistance. Set alarms
closely to detect clinically significant changes.
55 A new flow sensor is delivered clean, but not
sterile. It should be autoclaved as described in
the Cleaning and Disinfection Procedure prior to
initial use. Use only SLE approved flow sensors
(Part number: N5402).
56 Because a patient’s inspired gas comes into
contact with the internal parts of the flow sensor
that can absorb disinfecting agents, be sure to
disinfect the sensor according the techniques
described in “Cleaning and Sterilization of the
N5402-REV2 Sensor” on page 101.
57 Repeated autoclave cycles may cause surface
crazing which may only be cosmetic and not
affect performance or safety. Inspect the sensor
for integrity following disinfection and before
each use. Discard and replace if significant
structural cracking is noted.
6.1.1.5 Flow Sensor (Single Use, N5302)
58 The presence of secretion on the sensor mesh
may cause increased resistance. Set alarms
closely to detect clinically significant changes.
59 When carrying out ET suctioning with the
ventilator delivering high flow rates it is possible
to activate the sensor contamination alarm
inadvertently. To avoid this situation disconnect
the ET manifold first from the flow sensor, then
the flow sensor from the ET tube. It is also
important to reconnect the flow sensor and
manifold in the reverse order so as to again
avoid the contamination alarm. For more
information please refer to “Flow sensor removal
for suctioning or re-calibration, pausing
ventilation” on page 71.
60 The flow sensor supplied sterile and ready for
use.
61 The flow sensor can only be used once (one
patient episode) and should be disposed of as
clinical waste when ventilation has finished.
Warning: The user should set the MAX PIP
close to measured PIP (4 to 5 mbar above
measured PIP or as per clinical
recommendation). If the flow sensor is
removed from the circuit (for suctioning or re-
calibration) and the patient circuit is
reconnected, the ventilator senses that the
Vte has dropped below the set target level. It
will then increase the pressure up to the set
MAX PIP to try and achieve the set Vte.
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