SLE SLE2000 HFO, Руководство по обслуживанию, Страница: 72 / 84

SLE2000 HFO Service Manual
Doc No. SM/0001: Issue 7.0
Page 72 of 84
14) By selecting a range of CPAP pressures from O cmH
2
O to 30 cmH
2
O in 10 cmH
2
O steps, and
adjusting the CPAP alarm setting to the CPAP pressure, observe that the displayed CPAP pressure
plateau and bargraph display correspond with alarm line and LED Segment, respectively.
15) Check that CPAP audible and visual alarm operates at pressures at or below CPAP alarm setting.
16) With a CPAP alarm condition present, check that on pressing the MUTE button, the audible alarm
is muted and the MUTE LED is activated for a period of one minute unless cancelled by the
RESET button.
17) Check that the RESET button cancels the MUTE function and resets all latched warning LED’s.
18) Set Pressure Display Switch to MEAN position. Select a CPAP pressure of 0 cmH
2
O, and an
INSP pressure of 20 cmH
2
O. Select an INSP TIME of 0.5 seconds. Repeatedly press the
MANUAL BREATH push-button at approximately 1 second intervals, to cycle ventilator and
observe that the digitally displayed MEAN pressure gradually rises to 10 cmH
2
O in a period of 30
seconds.
19) Select CMV mode, HFO off. Set a CPAP pressure of 0 cmH
2
O, and an INSP pressure of 20
cmH
2
O. Set an INSP time of 0.5 seconds, and a CMV rate of 60 BPM. Set CYCLE FAIL alarm
level to 10 cmH
2
O, HIGH alarm level to 30 cmH
2
O and CPAP alarm level to -5 cmH
2
O. Press
reset button, observe that the displayed pressure wave crosses the CYCLE FAIL alarm setting on
the LCD display and bargraph, and that no alarms are present. Disconnect the proximal airway
pressure monitoring tube from the pressure port and check that a CYCLE FAIL audible and visual
alarm is activated. Replace the tube and observe that the audible alarm cancels, and that the
latched LED is cancelled on pressing the RESET button.
20) Select CPAP mode, HFO in EXP mode. Set an HFO frequency of 10 Hz, and turn HFO pressure
control fully anticlockwise, so that no HFO pressure modulation is present. Check that a CYCLE
FAIL audible and visual alarm is activated. Gradually introduce HFO pressure modulation and
check that the audible alarm cancels at an HFO pressure of 4 cmH
2
O peak to peak and that the
latched LED is cancelled on pressing the RESET button.
21) Set HFO to CONT mode and repeat previous test.
22) Check that in HFO INSP mode, there is no HFO modulation and no CYCLE FAIL alarm.
7.2 HFO M
ODULATION
1) Switch to CMV mode. Select 30 BPM with 1 second INSP time. Set an inspiratory pressure of
30 cmH
2
O and a CPAP pressure of 0 cmH
2
O. Set HIGH alarm to 60 cmH
2
O, CYCLE FAIL
alarm to 20 cmH
2
O, and LOW alarm to -20 cmH
2
O. Select a display frame time of 2 seconds.
2) Switch HFO mode to EXP. Observe that HFO modulation occurs during expiratory phase of
pressure cycle only