Mindray A8 - Irregular Flow Waveforms

7-50
Failure
Description
Cause Confirmation
Confirmation
Result
Solution
3-way valve sampling line
are connected properly.
Remove the VE assembly by
referring to 8.29 and check
whether the sampling line on
the work surface is connected
properly.
The silicone tube
loosens or is
occluded.
Reconnect the silicone tube
and prevent it from
occlusion.
Perform PEEP valve
diagnosis by referring to
7.6.3.
A PEEP
diagnosis error
occurs.
Replace the drive gas
assembly (refer to 11.1.17).
Check whether other
technical alarms are
generated.
A PEEP
technical alarm is
generated.
Refer to 4.3 to clear the
alarm.
The problem persists.
The problem
persists.
Replace the sensor adapter
board (refer to 11.1.16) and
drive gas assembly (refer to
11.1.17).
7.4.7 Irregular Flow Waveforms
Failure
Description
Cause Confirmation
Confirmation
Result
Solution
Irregular flow
waveforms
Check whether the gas supply
fluctuates greatly.
The gas supply
fluctuates greatly
(the pipeline supply
pressure drops by
more than 50 kPa (7
psi) during
ventilation).
Connect a stable gas
supply.
Check for water in the circuit
(corrugated tube, flow sensor,
water collection cup, and
absorber canister).
There is too much
water in the
corrugated tube,
flow sensor, water
collection cup, or
absorber canister.
Remove the water.
Visually inspect whether the
breathing valve is stuck
during ventilation.
The breathing valve
is stuck.
(1) Remove and clean the
breathing valve by
referring to
11.5.2.
(2) If the problem persists,
replace the breathing valve
(refer to 11.5.2).
Open the service door (refer
to 8.1.1) and check whether
the sensor adapter board and
3-way valve sampling line are
connected properly.
The silicone tube
loosens or is
occluded.
Reconnect the silicone tube
and prevent it from
occlusion.
Remove the VE assembly by
referring to 9.38 and check
whether the sampling line on
the work surface is connected
properly.
The silicone tube
loosens or is
occluded.
Reconnect the silicone tube
and prevent it from
occlusion.